MyBatis学习总结(八)——Mybatis3.x与Spring4.x整合
一、搭建开发环境
1.1、使用 Maven 创建 Web 项目
执行如下命令：
mvn archetype:create -DgroupId=me.gacl -DartifactId=spring4-mybatis3 -DarchetypeArtifactId=maven-archetype-webapp -DinteractiveMode=false
如下图所示：
创建好的项目如下：
编辑 pom.xml 文件
1 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 2 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd"> 3 <modelVersion>4.0.0</modelVersion> 4 <groupId>me.gacl</groupId> 5 <artifactId>spring4-mybatis3</artifactId> 6 <packaging>war</packaging> 7 <version>1.0-SNAPSHOT</version> 8 <name>spring4-mybatis3 Maven Webapp</name> 9 <url>http://maven.apache.org</url> 10 <dependencies> 11 <dependency> 12 <groupId>junit</groupId> 13 <artifactId>junit</artifactId> 14 <version>3.8.1</version> 15 <scope>test</scope> 16 </dependency> 17 </dependencies> 18 <build> 19 <finalName>spring4-mybatis3</finalName> 20 </build> 21 </project>
修改 <name>spring4-mybatis3 Maven Webapp</name> 部分，把 " Maven Webapp" 这部分包含空格的内容去掉，否则 Maven 在编译项目时会因为空格的原因导致一些莫名其妙的错误出现，修改成： <name>spring4-mybatis3</name> 。
另外，把以下内容删掉：
1 <dependency> 2 <groupId>junit</groupId> 3 <artifactId>junit</artifactId> 4 <version>3.8.1</version> 5 <scope>test</scope> 6 </dependency>
这部分是 junit 的 jar 包依赖信息，这个版本太低了，我们不使用这个 Junit 测试版本，修改过后的 pom.xml 内容如下：
1 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 2 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd"> 3 <modelVersion>4.0.0</modelVersion> 4 <groupId>me.gacl</groupId> 5 <artifactId>spring4-mybatis3</artifactId> 6 <packaging>war</packaging> 7 <version>1.0-SNAPSHOT</version> 8 <name>spring4-mybatis3</name> 9 <url>http://maven.apache.org</url> 10 <dependencies> 11 12 </dependencies> 13 <build> 14 <finalName>spring4-mybatis3</finalName> 15 </build> 16 </project>
1.2、将创建好的项目导入 MyEclipse 中
具体操作步骤如下图所示：
手动创建【src/main/java】、【src/test/resources】、【src/test/java】这三个 source folder，如下图所示：
到此，项目搭建的工作就算是全部完成了。
二、创建数据库和表 (针对 MySQL)
SQL 脚本如下：
Create DATABASE spring4_mybatis3; USE spring4_mybatis3;DROP TABLE IF EXISTS t_user;
CREATE TABLE t_user (
user_id char(32) NOT NULL,
user_name varchar(30) DEFAULT NULL,
user_birthday date DEFAULT NULL,
user_salary double DEFAULT NULL,
PRIMARY KEY (user_id)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
创建好的数据库和表如下：
三、使用 generator 工具生成代码
在网上找到了一个 generator 工具可以根据创建好的数据库表生成 MyBatis 的表对应的实体类，SQL 映射文件和 dao，找到 generator 工具根目录下的 generator.xml 文件，这个文件是用来配置代码生成规则的，如下图所示：
编辑 generator.xml 文件，内容如下：
1 <?xml version="1.0" encoding="UTF-8"?> 2 <!DOCTYPE generatorConfiguration PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN" "http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd"> 3 <generatorConfiguration> 4 <!-- 数据库驱动包位置 --> 5 <classPathEntry location="E:\repository\mysql\mysql-connector-java\5.1.34\mysql-connector-java-5.1.34.jar" /> 6 <!-- <classPathEntry location="C:\oracle\product\10.2.0\db_1\jdbc\lib\ojdbc14.jar" />--> 7 <context id="DB2Tables" targetRuntime="MyBatis3"> 8 <commentGenerator> 9 <property name="suppressAllComments" value="true" /> 10 </commentGenerator> 11 <!-- 数据库链接 URL、用户名、密码 --> 12 <jdbcConnection driverClass="com.mysql.jdbc.Driver" connectionURL="jdbc:mysql://localhost:3306/spring4_mybatis3" userId="root" password="XDP"> 13 <!--<jdbcConnection driverClass="oracle.jdbc.driver.OracleDriver" connectionURL="jdbc:oracle:thin:@localhost:1521:orcl" userId="msa" password="msa">--> 14 </jdbcConnection> 15 <javaTypeResolver> 16 <property name="forceBigDecimals" value="false" /> 17 </javaTypeResolver> 18 <!-- 生成实体类的包名和位置，这里配置将生成的实体类放在 me.gacl.domain 这个包下 --> 19 <javaModelGenerator targetPackage="me.gacl.domain" targetProject="C:\Users\gacl\spring4-mybatis3\src\main\java"> 20 <property name="enableSubPackages" value="true" /> 21 <property name="trimStrings" value="true" /> 22 </javaModelGenerator> 23 <!-- 生成的 SQL 映射文件包名和位置，这里配置将生成的 SQL 映射文件放在 me.gacl.mapping 这个包下 --> 24 <sqlMapGenerator targetPackage="me.gacl.mapping" targetProject="C:\Users\gacl\spring4-mybatis3\src\main\java"> 25 <property name="enableSubPackages" value="true" /> 26 </sqlMapGenerator> 27 <!-- 生成 DAO 的包名和位置，这里配置将生成的 dao 类放在 me.gacl.dao 这个包下 --> 28 <javaClientGenerator type="XMLMAPPER" targetPackage="me.gacl.dao" targetProject="C:\Users\gacl\spring4-mybatis3\src\main\java"> 29 <property name="enableSubPackages" value="true" /> 30 </javaClientGenerator> 31 <!-- 要生成那些表 (更改 tableName 和 domainObjectName 就可以) --> 32 <table tableName="t_user" domainObjectName="User" enableCountByExample="false" enableUpdateByExample="false" enableDeleteByExample="false" enableSelectByExample="false" selectByExampleQueryId="false" /> 33 </context> 34 </generatorConfiguration>
打开命令行窗口，切换到生成工具的根目录下，执行如下命令：
java -jar mybatis-generator-core-1.3.2.jar -configfile generator.xml -overwrite
如下图所示：
刚才我们在 generator.xml 文件中配置将生成的代码和 SQL 映射文件放到 "C:\Users\gacl\spring4-mybatis3\src\main\java" 这个目录下，这个目录就是我们的 spring4-mybatis3 项目所在目录，我们刷新一下 src/main/java 目录，就可以看到生成的代码和映射文件了，如下图所示：
生成的代码和映射文件一行都不用改，可以直接应用到项目当中。下面我们看一眼由 generator 工具生成的代码和映射文件：
1、生成的 dao 类
1 package me.gacl.dao; 2 3 import me.gacl.domain.User; 4 5 public interface UserMapper { 6 int deleteByPrimaryKey(String userId); 7 8 int insert(User record); 9 10 int insertSelective(User record); 11 12 User selectByPrimaryKey(String userId); 13 14 int updateByPrimaryKeySelective(User record); 15 16 int updateByPrimaryKey(User record); 17 }
生成的 UserMapper 是一个接口，里面定义了一些操作 t_user 表的增删改查方法。
2、生成的实体类
1 package me.gacl.domain; 2 3 import java.util.Date; 4 5 public class User { 6 private String userId; 7 8 private String userName; 9 10 private Date userBirthday; 11 12 private Double userSalary; 13 14 public String getUserId() { 15 return userId; 16 } 17 18 public void setUserId(String userId) { 19 this.userId = userId == null ? null : userId.trim(); 20 } 21 22 public String getUserName() { 23 return userName; 24 } 25 26 public void setUserName(String userName) { 27 this.userName = userName == null ? null : userName.trim(); 28 } 29 30 public Date getUserBirthday() { 31 return userBirthday; 32 } 33 34 public void setUserBirthday(Date userBirthday) { 35 this.userBirthday = userBirthday; 36 } 37 38 public Double getUserSalary() { 39 return userSalary; 40 } 41 42 public void setUserSalary(Double userSalary) { 43 this.userSalary = userSalary; 44 } 45 }
User 类是 t_user 表的对应的实体类，User 类中定义的属性和 t_user 表中的字段一一对应。
3、生成的 SQL 映射文件
1 <?xml version="1.0" encoding="UTF-8" ?> 2 <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" > 3 <mapper namespace="me.gacl.dao.UserMapper" > 4 <resultMap id="BaseResultMap" type="me.gacl.domain.User" > 5 <id column="user_id" property="userId" jdbcType="CHAR" /> 6 <result column="user_name" property="userName" jdbcType="VARCHAR" /> 7 <result column="user_birthday" property="userBirthday" jdbcType="DATE" /> 8 <result column="user_salary" property="userSalary" jdbcType="DOUBLE" /> 9 </resultMap> 10 <sql id="Base_Column_List" > 11 user_id, user_name, user_birthday, user_salary 12 </sql> 13 <select id="selectByPrimaryKey" resultMap="BaseResultMap" parameterType="java.lang.String" > 14 select 15 <include refid="Base_Column_List" /> 16 from t_user 17 where user_id = #{userId,jdbcType=CHAR} 18 </select> 19 <delete id="deleteByPrimaryKey" parameterType="java.lang.String" > 20 delete from t_user 21 where user_id = #{userId,jdbcType=CHAR} 22 </delete> 23 <insert id="insert" parameterType="me.gacl.domain.User" > 24 insert into t_user (user_id, user_name, user_birthday, 25 user_salary) 26 values (#{userId,jdbcType=CHAR}, #{userName,jdbcType=VARCHAR}, #{userBirthday,jdbcType=DATE}, 27 #{userSalary,jdbcType=DOUBLE}) 28 </insert> 29 <insert id="insertSelective" parameterType="me.gacl.domain.User" > 30 insert into t_user 31 <trim prefix="(" suffix=")" suffixOverrides="," > 32 <if test="userId != null" > 33 user_id, 34 </if> 35 <if test="userName != null" > 36 user_name, 37 </if> 38 <if test="userBirthday != null" > 39 user_birthday, 40 </if> 41 <if test="userSalary != null" > 42 user_salary, 43 </if> 44 </trim> 45 <trim prefix="values (" suffix=")" suffixOverrides="," > 46 <if test="userId != null" > 47 #{userId,jdbcType=CHAR}, 48 </if> 49 <if test="userName != null" > 50 #{userName,jdbcType=VARCHAR}, 51 </if> 52 <if test="userBirthday != null" > 53 #{userBirthday,jdbcType=DATE}, 54 </if> 55 <if test="userSalary != null" > 56 #{userSalary,jdbcType=DOUBLE}, 57 </if> 58 </trim> 59 </insert> 60 <update id="updateByPrimaryKeySelective" parameterType="me.gacl.domain.User" > 61 update t_user 62 <set > 63 <if test="userName != null" > 64 user_name = #{userName,jdbcType=VARCHAR}, 65 </if> 66 <if test="userBirthday != null" > 67 user_birthday = #{userBirthday,jdbcType=DATE}, 68 </if> 69 <if test="userSalary != null" > 70 user_salary = #{userSalary,jdbcType=DOUBLE}, 71 </if> 72 </set> 73 where user_id = #{userId,jdbcType=CHAR} 74 </update> 75 <update id="updateByPrimaryKey" parameterType="me.gacl.domain.User" > 76 update t_user 77 set user_name = #{userName,jdbcType=VARCHAR}, 78 user_birthday = #{userBirthday,jdbcType=DATE}, 79 user_salary = #{userSalary,jdbcType=DOUBLE} 80 where user_id = #{userId,jdbcType=CHAR} 81 </update> 82 </mapper>
UserMapper.xml 这个文件的内容是编写操作 t_user 表的 SQL 语句，重点说一下 UserMapper.xml 配置中需要注意的几个小细节问题：
1、UserMapper.xml 的 <mapper> 标签的 namespace 必须是 UserMapper 接口的全类名，既<mapper namespace="me.gacl.dao.UserMapper" >
2、UserMapper.xml 的定义操作数据库的 <select><delete><update><insert> 这些标签的 id 属性的值必须和 UserMapper 接口定义的方法名一致，如下图所示：
之所以有上述说的这两点要求，就是为了能够让 MyBatis 能够根据 UserMapper 接口和 UserMapper.xml 文件去自动实现 UserMapper 接口中定义的相关方法，这样我们就不再需要针对 UserMapper 接口去编写具体的实现代码了。
四、Spring 与 MyBatis 整合
首先我们要在项目中加入我们需要的相关 jar 包，我们可以到 Maven 的中央仓库：http://search.maven.org/ 找到我们要的相关 jar 包，如下图所示：
我们只需要在搜索框中输入要找的 jar 包的名称，点击【SEARCH】按钮，就可以找到我们要的 jar 包了。
4.1、添加 Spring 与 Mybatis 的相关 jar 包
1、添加 spring-core，输入 spring-core 关键字进行查找，如下图所示：
找到关于 spring-core 的依赖描述信息，如下图所示：
将
<dependency> <groupId>org.springframework</groupId> <artifactId>spring-core</artifactId> <version>4.1.4.RELEASE</version> </dependency>
复制到项目的 pom.xml 文件中，如下所示：
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>me.gacl</groupId> <artifactId>spring4-mybatis3</artifactId> <packaging>war</packaging> <version>1.0-SNAPSHOT</version> <name>spring4-mybatis3</name> <url>http://maven.apache.org</url> <dependencies> <!-- 添加 Spring4.1.4 的核心包 --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-core</artifactId> <version>4.1.4.RELEASE</version> </dependency><span style="color: rgba(0, 0, 255, 1)"></</span><span style="color: rgba(128, 0, 0, 1)">dependencies</span><span style="color: rgba(0, 0, 255, 1)">></span> <span style="color: rgba(0, 0, 255, 1)"><</span><span style="color: rgba(128, 0, 0, 1)">build</span><span style="color: rgba(0, 0, 255, 1)">></span> <span style="color: rgba(0, 0, 255, 1)"><</span><span style="color: rgba(128, 0, 0, 1)">finalName</span><span style="color: rgba(0, 0, 255, 1)">></span>spring4-mybatis3<span style="color: rgba(0, 0, 255, 1)"></</span><span style="color: rgba(128, 0, 0, 1)">finalName</span><span style="color: rgba(0, 0, 255, 1)">></span> <span style="color: rgba(0, 0, 255, 1)"></</span><span style="color: rgba(128, 0, 0, 1)">build</span><span style="color: rgba(0, 0, 255, 1)">></span></project>
这样 Maven 就会自动帮我们从 Maven 的中央仓库中下载 spring-core 这个 jar 包到我们的本地仓库，然后将 spring-core 这个 jar 包以及它的相关依赖包加入到我们的项目当中，如下所示：
spring4.x 与 mybatis3.x 所需要的相关 jar 包都可以采用上述所说的方式进行查找，然后添加到项目当中，添加完 spring4.x 与 mybatis3.x 相关 jar 包后，pom.xml 文件内容最终如下：
1 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 2 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd"> 3 <modelVersion>4.0.0</modelVersion> 4 <groupId>me.gacl</groupId> 5 <artifactId>spring4-mybatis3</artifactId> 6 <packaging>war</packaging> 7 <version>1.0-SNAPSHOT</version> 8 <name>spring4-mybatis3</name> 9 <url>http://maven.apache.org</url> 10 <dependencies> 11 <!-- 添加 Spring-core 包 --> 12 <dependency> 13 <groupId>org.springframework</groupId> 14 <artifactId>spring-core</artifactId> 15 <version>4.1.4.RELEASE</version> 16 </dependency> 17 <!-- 添加 spring-context 包 --> 18 <dependency> 19 <groupId>org.springframework</groupId> 20 <artifactId>spring-context</artifactId> 21 <version>4.1.4.RELEASE</version> 22 </dependency> 23 <!-- 添加 spring-tx 包 --> 24 <dependency> 25 <groupId>org.springframework</groupId> 26 <artifactId>spring-tx</artifactId> 27 <version>4.1.4.RELEASE</version> 28 </dependency> 29 <!-- 添加 spring-jdbc 包 --> 30 <dependency> 31 <groupId>org.springframework</groupId> 32 <artifactId>spring-jdbc</artifactId> 33 <version>4.1.4.RELEASE</version> 34 </dependency> 35 <!-- 为了方便进行单元测试，添加 spring-test 包 --> 36 <dependency> 37 <groupId>org.springframework</groupId> 38 <artifactId>spring-test</artifactId> 39 <version>4.1.4.RELEASE</version> 40 </dependency> 41 <!--添加 spring-web 包 --> 42 <dependency> 43 <groupId>org.springframework</groupId> 44 <artifactId>spring-web</artifactId> 45 <version>4.1.4.RELEASE</version> 46 </dependency> 47 <!--添加 aspectjweaver 包 --> 48 <dependency> 49 <groupId>org.aspectj</groupId> 50 <artifactId>aspectjweaver</artifactId> 51 <version>1.8.5</version> 52 </dependency> 53 <!-- 添加 mybatis 的核心包 --> 54 <dependency> 55 <groupId>org.mybatis</groupId> 56 <artifactId>mybatis</artifactId> 57 <version>3.2.8</version> 58 </dependency> 59 <!-- 添加 mybatis 与 Spring 整合的核心包 --> 60 <dependency> 61 <groupId>org.mybatis</groupId> 62 <artifactId>mybatis-spring</artifactId> 63 <version>1.2.2</version> 64 </dependency> 65 <!-- 添加 servlet3.0 核心包 --> 66 <dependency> 67 <groupId>javax.servlet</groupId> 68 <artifactId>javax.servlet-api</artifactId> 69 <version>3.0.1</version> 70 </dependency> 71 <dependency> 72 <groupId>javax.servlet.jsp</groupId> 73 <artifactId>javax.servlet.jsp-api</artifactId> 74 <version>2.3.2-b01</version> 75 </dependency> 76 <!-- jstl --> 77 <dependency> 78 <groupId>javax.servlet</groupId> 79 <artifactId>jstl</artifactId> 80 <version>1.2</version> 81 </dependency> 82 <!-- 添加 mysql 驱动包 --> 83 <dependency> 84 <groupId>mysql</groupId> 85 <artifactId>mysql-connector-java</artifactId> 86 <version>5.1.34</version> 87 </dependency> 88 <!-- 添加 druid 连接池包 --> 89 <dependency> 90 <groupId>com.alibaba</groupId> 91 <artifactId>druid</artifactId> 92 <version>1.0.12</version> 93 </dependency> 94 <!-- 添加 junit 单元测试包 --> 95 <dependency> 96 <groupId>junit</groupId> 97 <artifactId>junit</artifactId> 98 <version>4.12</version> 99 <scope>test</scope> 100 </dependency> 101 </dependencies> 102 <build> 103 <finalName>spring4-mybatis3</finalName> 104 </build> 105 </project>
4.2、编写相关配置文件
1、dbconfig.properties
在 src/main/resources 目录下创建一个 dbconfig.properties 文件，用于编写连接 MySQL 数据库的相关信息，dbconfig.properties 的内容如下：
driverClassName=com.mysql.jdbc.Driver validationQuery=SELECT 1 jdbc_url=jdbc:mysql://localhost:3306/spring4_mybatis3?useUnicode=true&characterEncoding=UTF-8&zeroDateTimeBehavior=convertToNull jdbc_username=root jdbc_password=XDP
2、spring.xml(spring 框架的配置文件)
在 src/main/resources 目录下创建一个 spring.xml 文件，spring.xml 文件就是针对 Spring 框架编写的核心配置文件，spring.xml 的内容如下：
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context" xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd"><span style="color: rgba(0, 128, 0, 1)"><!--</span><span style="color: rgba(0, 128, 0, 1)"> 引入dbconfig.properties属性文件 </span><span style="color: rgba(0, 128, 0, 1)">--></span> <span style="color: rgba(0, 0, 255, 1)"><</span><span style="color: rgba(128, 0, 0, 1)">context:property-placeholder </span><span style="color: rgba(255, 0, 0, 1)">location</span><span style="color: rgba(0, 0, 255, 1)">="classpath:dbconfig.properties"</span> <span style="color: rgba(0, 0, 255, 1)">/></span> <span style="color: rgba(0, 128, 0, 1)"><!--</span><span style="color: rgba(0, 128, 0, 1)"> 自动扫描(自动注入)，扫描me.gacl.service这个包以及它的子包的所有使用@Service注解标注的类 </span><span style="color: rgba(0, 128, 0, 1)">--></span> <span style="color: rgba(0, 0, 255, 1)"><</span><span style="color: rgba(128, 0, 0, 1)">context:component-scan </span><span style="color: rgba(255, 0, 0, 1)">base-package</span><span style="color: rgba(0, 0, 255, 1)">="me.gacl.service"</span> <span style="color: rgba(0, 0, 255, 1)">/></span></beans>
我们的 spring.xml 文件的配置非常简单，就两个配置。
3、spring-mybatis.xml(spring 与 mybatis 整合的配置文件)
在 src/main/resources 目录下创建一个 spring-mybatis.xml 文件，spring-mybatis.xml 文件就是针对 Spring 框架与 Mybatis 框架整合编写的配置文件，spring-mybatis.xml 的内容如下：
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:aop="http://www.springframework.org/schema/aop" xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd "><span style="color: rgba(0, 128, 0, 1)"><!--</span><span style="color: rgba(0, 128, 0, 1)"> JNDI方式配置数据源 </span><span style="color: rgba(0, 128, 0, 1)">--></span> <span style="color: rgba(0, 128, 0, 1)"><!--</span><span style="color: rgba(0, 128, 0, 1)"> <bean id="dataSource" class="org.springframework.jndi.JndiObjectFactoryBean"> <property name="jndiName" value="${jndiName}"></property> </bean> </span><span style="color: rgba(0, 128, 0, 1)">--></span> <span style="color: rgba(0, 128, 0, 1)"><!--</span><span style="color: rgba(0, 128, 0, 1)"> ========================================配置数据源========================================= </span><span style="color: rgba(0, 128, 0, 1)">--></span> <span style="color: rgba(0, 128, 0, 1)"><!--</span><span style="color: rgba(0, 128, 0, 1)"> 配置数据源，使用的是alibaba的Druid(德鲁伊)数据源 </span><span style="color: rgba(0, 128, 0, 1)">--></span> <span style="color: rgba(0, 0, 255, 1)"><</span><span style="color: rgba(128, 0, 0, 1)">bean </span><span style="color: rgba(255, 0, 0, 1)">name</span><span style="color: rgba(0, 0, 255, 1)">="dataSource"</span><span style="color: rgba(255, 0, 0, 1)"> class</span><span style="color: rgba(0, 0, 255, 1)">="com.alibaba.druid.pool.DruidDataSource"</span><span style="color: rgba(255, 0, 0, 1)"> init-method</span><span style="color: rgba(0, 0, 255, 1)">="init"</span><span style="color: rgba(255, 0, 0, 1)"> destroy-method</span><span style="color: rgba(0, 0, 255, 1)">="close"</span><span style="color: rgba(0, 0, 255, 1)">></span> <span style="color: rgba(0, 0, 255, 1)"><</span><span style="color: rgba(128, 0, 0, 1)">property </span><span style="color: rgba(255, 0, 0, 1)">name</span><span style="color: rgba(0, 0, 255, 1)">="url"</span><span style="color: rgba(255, 0, 0, 1)"> value</span><span style="color: rgba(0, 0, 255, 1)">="${jdbc_url}"</span> <span style="color: rgba(0, 0, 255, 1)">/></span> <span style="color: rgba(0, 0, 255, 1)"><</span><span style="color: rgba(128, 0, 0, 1)">property </span><span style="color: rgba(255, 0, 0, 1)">name</span><span style="color: rgba(0, 0, 255, 1)">="username"</span><span style="color: rgba(255, 0, 0, 1)"> value</span><span style="color: rgba(0, 0, 255, 1)">="${jdbc_username}"</span> <span style="color: rgba(0, 0, 255, 1)">/></span> <span style="color: rgba(0, 0, 255, 1)"><</span><span style="color: rgba(128, 0, 0, 1)">property </span><span style="color: rgba(255, 0, 0, 1)">name</span><span style="color: rgba(0, 0, 255, 1)">="password"</span><span style="color: rgba(255, 0, 0, 1)"> value</span><span style="color: rgba(0, 0, 255, 1)">="${jdbc_password}"</span> <span style="color: rgba(0, 0, 255, 1)">/></span> <span style="color: rgba(0, 128, 0, 1)"><!--</span><span style="color: rgba(0, 128, 0, 1)"> 初始化连接大小 </span><span style="color: rgba(0, 128, 0, 1)">--></span> <span style="color: rgba(0, 0, 255, 1)"><</span><span style="color: rgba(128, 0, 0, 1)">property </span><span style="color: rgba(255, 0, 0, 1)">name</span><span style="color: rgba(0, 0, 255, 1)">="initialSize"</span><span style="color: rgba(255, 0, 0, 1)"> value</span><span style="color: rgba(0, 0, 255, 1)">="0"</span> <span style="color: rgba(0, 0, 255, 1)">/></span> <span style="color: rgba(0, 128, 0, 1)"><!--</span><span style="color: rgba(0, 128, 0, 1)"> 连接池最大使用连接数量 </span><span style="color: rgba(0, 128, 0, 1)">--></span> <span style="color: rgba(0, 0, 255, 1)"><</span><span style="color: rgba(128, 0, 0, 1)">property </span><span style="color: rgba(255, 0, 0, 1)">name</span><span style="color: rgba(0, 0, 255, 1)">="maxActive"</span><span style="color: rgba(255, 0, 0, 1)"> value</span><span style="color: rgba(0, 0, 255, 1)">="20"</span> <span style="color: rgba(0, 0, 255, 1)">/></span> <span style="color: rgba(0, 128, 0, 1)"><!--</span><span style="color: rgba(0, 128, 0, 1)"> 连接池最大空闲 </span><span style="color: rgba(0, 128, 0, 1)">--></span> <span style="color: rgba(0, 0, 255, 1)"><</span><span style="color: rgba(128, 0, 0, 1)">property </span><span style="color: rgba(255, 0, 0, 1)">name</span><span style="color: rgba(0, 0, 255, 1)">="maxIdle"</span><span style="color: rgba(255, 0, 0, 1)"> value</span><span style="color: rgba(0, 0, 255, 1)">="20"</span> <span style="color: rgba(0, 0, 255, 1)">/></span> <span style="color: rgba(0, 128, 0, 1)"><!--</span><span style="color: rgba(0, 128, 0, 1)"> 连接池最小空闲 </span><span style="color: rgba(0, 128, 0, 1)">--></span> <span style="color: rgba(0, 0, 255, 1)"><</span><span style="color: rgba(128, 0, 0, 1)">property </span><span style="color: rgba(255, 0, 0, 1)">name</span><span style="color: rgba(0, 0, 255, 1)">="minIdle"</span><span style="color: rgba(255, 0, 0, 1)"> value</span><span style="color: rgba(0, 0, 255, 1)">="0"</span> <span style="color: rgba(0, 0, 255, 1)">/></span> <span style="color: rgba(0, 128, 0, 1)"><!--</span><span style="color: rgba(0, 128, 0, 1)"> 获取连接最大等待时间 </span><span style="color: rgba(0, 128, 0, 1)">--></span> <span style="color: rgba(0, 0, 255, 1)"><</span><span style="color: rgba(128, 0, 0, 1)">property </span><span style="color: rgba(255, 0, 0, 1)">name</span><span style="color: rgba(0, 0, 255, 1)">="maxWait"</span><span style="color: rgba(255, 0, 0, 1)"> value</span><span style="color: rgba(0, 0, 255, 1)">="60000"</span> <span style="color: rgba(0, 0, 255, 1)">/></span> <span style="color: rgba(0, 128, 0, 1)"><!--</span><span style="color: rgba(0, 128, 0, 1)"> <property name="poolPreparedStatements" value="true" /> <property name="maxPoolPreparedStatementPerConnectionSize" value="33" /> </span><span style="color: rgba(0, 128, 0, 1)">--></span> <span style="color: rgba(0, 0, 255, 1)"><</span><span style="color: rgba(128, 0, 0, 1)">property </span><span style="color: rgba(255, 0, 0, 1)">name</span><span style="color: rgba(0, 0, 255, 1)">="validationQuery"</span><span style="color: rgba(255, 0, 0, 1)"> value</span><span style="color: rgba(0, 0, 255, 1)">="${validationQuery}"</span> <span style="color: rgba(0, 0, 255, 1)">/></span> <span style="color: rgba(0, 0, 255, 1)"><</span><span style="color: rgba(128, 0, 0, 1)">property </span><span style="color: rgba(255, 0, 0, 1)">name</span><span style="color: rgba(0, 0, 255, 1)">="testOnBorrow"</span><span style="color: rgba(255, 0, 0, 1)"> value</span><span style="color: rgba(0, 0, 255, 1)">="false"</span> <span style="color: rgba(0, 0, 255, 1)">/></span> <span style="color: rgba(0, 0, 255, 1)"><</span><span style="color: rgba(128, 0, 0, 1)">property </span><span style="color: rgba(255, 0, 0, 1)">name</span><span style="color: rgba(0, 0, 255, 1)">="testOnReturn"</span><span style="color: rgba(255, 0, 0, 1)"> value</span><span style="color: rgba(0, 0, 255, 1)">="false"</span> <span style="color: rgba(0, 0, 255, 1)">/></span> <span style="color: rgba(0, 0, 255, 1)"><</span><span style="color: rgba(128, 0, 0, 1)">property </span><span style="color: rgba(255, 0, 0, 1)">name</span><span style="color: rgba(0, 0, 255, 1)">="testWhileIdle"</span><span style="color: rgba(255, 0, 0, 1)"> value</span><span style="color: rgba(0, 0, 255, 1)">="true"</span> <span style="color: rgba(0, 0, 255, 1)">/></span> <span style="color: rgba(0, 128, 0, 1)"><!--</span><span style="color: rgba(0, 128, 0, 1)"> 配置间隔多久才进行一次检测，检测需要关闭的空闲连接，单位是毫秒 </span><span style="color: rgba(0, 128, 0, 1)">--></span> <span style="color: rgba(0, 0, 255, 1)"><</span><span style="color: rgba(128, 0, 0, 1)">property </span><span style="color: rgba(255, 0, 0, 1)">name</span><span style="color: rgba(0, 0, 255, 1)">="timeBetweenEvictionRunsMillis"</span><span style="color: rgba(255, 0, 0, 1)"> value</span><span style="color: rgba(0, 0, 255, 1)">="60000"</span> <span style="color: rgba(0, 0, 255, 1)">/></span> <span style="color: rgba(0, 128, 0, 1)"><!--</span><span style="color: rgba(0, 128, 0, 1)"> 配置一个连接在池中最小生存的时间，单位是毫秒 </span><span style="color: rgba(0, 128, 0, 1)">--></span> <span style="color: rgba(0, 0, 255, 1)"><</span><span style="color: rgba(128, 0, 0, 1)">property </span><span style="color: rgba(255, 0, 0, 1)">name</span><span style="color: rgba(0, 0, 255, 1)">="minEvictableIdleTimeMillis"</span><span style="color: rgba(255, 0, 0, 1)"> value</span><span style="color: rgba(0, 0, 255, 1)">="25200000"</span> <span style="color: rgba(0, 0, 255, 1)">/></span> <span style="color: rgba(0, 128, 0, 1)"><!--</span><span style="color: rgba(0, 128, 0, 1)"> 打开removeAbandoned功能 </span><span style="color: rgba(0, 128, 0, 1)">--></span> <span style="color: rgba(0, 0, 255, 1)"><</span><span style="color: rgba(128, 0, 0, 1)">property </span><span style="color: rgba(255, 0, 0, 1)">name</span><span style="color: rgba(0, 0, 255, 1)">="removeAbandoned"</span><span style="color: rgba(255, 0, 0, 1)"> value</span><span style="color: rgba(0, 0, 255, 1)">="true"</span> <span style="color: rgba(0, 0, 255, 1)">/></span> <span style="color: rgba(0, 128, 0, 1)"><!--</span><span style="color: rgba(0, 128, 0, 1)"> 1800秒，也就是30分钟 </span><span style="color: rgba(0, 128, 0, 1)">--></span> <span style="color: rgba(0, 0, 255, 1)"><</span><span style="color: rgba(128, 0, 0, 1)">property </span><span style="color: rgba(255, 0, 0, 1)">name</span><span style="color: rgba(0, 0, 255, 1)">="removeAbandonedTimeout"</span><span style="color: rgba(255, 0, 0, 1)"> value</span><span style="color: rgba(0, 0, 255, 1)">="1800"</span> <span style="color: rgba(0, 0, 255, 1)">/></span> <span style="color: rgba(0, 128, 0, 1)"><!--</span><span style="color: rgba(0, 128, 0, 1)"> 关闭abanded连接时输出错误日志 </span><span style="color: rgba(0, 128, 0, 1)">--></span> <span style="color: rgba(0, 0, 255, 1)"><</span><span style="color: rgba(128, 0, 0, 1)">property </span><span style="color: rgba(255, 0, 0, 1)">name</span><span style="color: rgba(0, 0, 255, 1)">="logAbandoned"</span><span style="color: rgba(255, 0, 0, 1)"> value</span><span style="color: rgba(0, 0, 255, 1)">="true"</span> <span style="color: rgba(0, 0, 255, 1)">/></span> <span style="color: rgba(0, 128, 0, 1)"><!--</span><span style="color: rgba(0, 128, 0, 1)"> 监控数据库 </span><span style="color: rgba(0, 128, 0, 1)">--></span> <span style="color: rgba(0, 128, 0, 1)"><!--</span><span style="color: rgba(0, 128, 0, 1)"> <property name="filters" value="stat" /> </span><span style="color: rgba(0, 128, 0, 1)">--></span> <span style="color: rgba(0, 0, 255, 1)"><</span><span style="color: rgba(128, 0, 0, 1)">property </span><span style="color: rgba(255, 0, 0, 1)">name</span><span style="color: rgba(0, 0, 255, 1)">="filters"</span><span style="color: rgba(255, 0, 0, 1)"> value</span><span style="color: rgba(0, 0, 255, 1)">="mergeStat"</span> <span style="color: rgba(0, 0, 255, 1)">/></span> <span style="color: rgba(0, 0, 255, 1)"></</span><span style="color: rgba(128, 0, 0, 1)">bean</span><span style="color: rgba(0, 0, 255, 1)">></span> <span style="color: rgba(0, 128, 0, 1)"><!--</span><span style="color: rgba(0, 128, 0, 1)"> ========================================分隔线========================================= </span><span style="color: rgba(0, 128, 0, 1)">--></span> <span style="color: rgba(0, 128, 0, 1)"><!--</span><span style="color: rgba(0, 128, 0, 1)"> ========================================针对myBatis的配置项============================== </span><span style="color: rgba(0, 128, 0, 1)">--></span> <span style="color: rgba(0, 128, 0, 1)"><!--</span><span style="color: rgba(0, 128, 0, 1)"> 配置sqlSessionFactory </span><span style="color: rgba(0, 128, 0, 1)">--></span> <span style="color: rgba(0, 0, 255, 1)"><</span><span style="color: rgba(128, 0, 0, 1)">bean </span><span style="color: rgba(255, 0, 0, 1)">id</span><span style="color: rgba(0, 0, 255, 1)">="sqlSessionFactory"</span><span style="color: rgba(255, 0, 0, 1)"> class</span><span style="color: rgba(0, 0, 255, 1)">="org.mybatis.spring.SqlSessionFactoryBean"</span><span style="color: rgba(0, 0, 255, 1)">></span> <span style="color: rgba(0, 128, 0, 1)"><!--</span><span style="color: rgba(0, 128, 0, 1)"> 实例化sqlSessionFactory时需要使用上述配置好的数据源以及SQL映射文件 </span><span style="color: rgba(0, 128, 0, 1)">--></span> <span style="color: rgba(0, 0, 255, 1)"><</span><span style="color: rgba(128, 0, 0, 1)">property </span><span style="color: rgba(255, 0, 0, 1)">name</span><span style="color: rgba(0, 0, 255, 1)">="dataSource"</span><span style="color: rgba(255, 0, 0, 1)"> ref</span><span style="color: rgba(0, 0, 255, 1)">="dataSource"</span> <span style="color: rgba(0, 0, 255, 1)">/></span> <span style="color: rgba(0, 128, 0, 1)"><!--</span><span style="color: rgba(0, 128, 0, 1)"> 自动扫描me/gacl/mapping/目录下的所有SQL映射的xml文件, 省掉Configuration.xml里的手工配置 value="classpath:me/gacl/mapping/*.xml"指的是classpath(类路径)下me.gacl.mapping包中的所有xml文件 UserMapper.xml位于me.gacl.mapping包下，这样UserMapper.xml就可以被自动扫描 </span><span style="color: rgba(0, 128, 0, 1)">--></span> <span style="color: rgba(0, 0, 255, 1)"><</span><span style="color: rgba(128, 0, 0, 1)">property </span><span style="color: rgba(255, 0, 0, 1)">name</span><span style="color: rgba(0, 0, 255, 1)">="mapperLocations"</span><span style="color: rgba(255, 0, 0, 1)"> value</span><span style="color: rgba(0, 0, 255, 1)">="classpath:me/gacl/mapping/*.xml"</span> <span style="color: rgba(0, 0, 255, 1)">/></span> <span style="color: rgba(0, 0, 255, 1)"></</span><span style="color: rgba(128, 0, 0, 1)">bean</span><span style="color: rgba(0, 0, 255, 1)">></span> <span style="color: rgba(0, 128, 0, 1)"><!--</span><span style="color: rgba(0, 128, 0, 1)"> 配置扫描器 </span><span style="color: rgba(0, 128, 0, 1)">--></span> <span style="color: rgba(0, 0, 255, 1)"><</span><span style="color: rgba(128, 0, 0, 1)">bean </span><span style="color: rgba(255, 0, 0, 1)">class</span><span style="color: rgba(0, 0, 255, 1)">="org.mybatis.spring.mapper.MapperScannerConfigurer"</span><span style="color: rgba(0, 0, 255, 1)">></span> <span style="color: rgba(0, 128, 0, 1)"><!--</span><span style="color: rgba(0, 128, 0, 1)"> 扫描me.gacl.dao这个包以及它的子包下的所有映射接口类 </span><span style="color: rgba(0, 128, 0, 1)">--></span> <span style="color: rgba(0, 0, 255, 1)"><</span><span style="color: rgba(128, 0, 0, 1)">property </span><span style="color: rgba(255, 0, 0, 1)">name</span><span style="color: rgba(0, 0, 255, 1)">="basePackage"</span><span style="color: rgba(255, 0, 0, 1)"> value</span><span style="color: rgba(0, 0, 255, 1)">="me.gacl.dao"</span> <span style="color: rgba(0, 0, 255, 1)">/></span> <span style="color: rgba(0, 0, 255, 1)"><</span><span style="color: rgba(128, 0, 0, 1)">property </span><span style="color: rgba(255, 0, 0, 1)">name</span><span style="color: rgba(0, 0, 255, 1)">="sqlSessionFactoryBeanName"</span><span style="color: rgba(255, 0, 0, 1)"> value</span><span style="color: rgba(0, 0, 255, 1)">="sqlSessionFactory"</span> <span style="color: rgba(0, 0, 255, 1)">/></span> <span style="color: rgba(0, 0, 255, 1)"></</span><span style="color: rgba(128, 0, 0, 1)">bean</span><span style="color: rgba(0, 0, 255, 1)">></span> <span style="color: rgba(0, 128, 0, 1)"><!--</span><span style="color: rgba(0, 128, 0, 1)"> ========================================分隔线========================================= </span><span style="color: rgba(0, 128, 0, 1)">--></span> <span style="color: rgba(0, 128, 0, 1)"><!--</span><span style="color: rgba(0, 128, 0, 1)"> 配置Spring的事务管理器 </span><span style="color: rgba(0, 128, 0, 1)">--></span> <span style="color: rgba(0, 0, 255, 1)"><</span><span style="color: rgba(128, 0, 0, 1)">bean </span><span style="color: rgba(255, 0, 0, 1)">id</span><span style="color: rgba(0, 0, 255, 1)">="transactionManager"</span><span style="color: rgba(255, 0, 0, 1)"> class</span><span style="color: rgba(0, 0, 255, 1)">="org.springframework.jdbc.datasource.DataSourceTransactionManager"</span><span style="color: rgba(0, 0, 255, 1)">></span> <span style="color: rgba(0, 0, 255, 1)"><</span><span style="color: rgba(128, 0, 0, 1)">property </span><span style="color: rgba(255, 0, 0, 1)">name</span><span style="color: rgba(0, 0, 255, 1)">="dataSource"</span><span style="color: rgba(255, 0, 0, 1)"> ref</span><span style="color: rgba(0, 0, 255, 1)">="dataSource"</span> <span style="color: rgba(0, 0, 255, 1)">/></span> <span style="color: rgba(0, 0, 255, 1)"></</span><span style="color: rgba(128, 0, 0, 1)">bean</span><span style="color: rgba(0, 0, 255, 1)">></span> <span style="color: rgba(0, 128, 0, 1)"><!--</span><span style="color: rgba(0, 128, 0, 1)"> 注解方式配置事物 </span><span style="color: rgba(0, 128, 0, 1)">--></span> <span style="color: rgba(0, 128, 0, 1)"><!--</span><span style="color: rgba(0, 128, 0, 1)"> <tx:annotation-driven transaction-manager="transactionManager" /> </span><span style="color: rgba(0, 128, 0, 1)">--></span> <span style="color: rgba(0, 128, 0, 1)"><!--</span><span style="color: rgba(0, 128, 0, 1)"> 拦截器方式配置事物 </span><span style="color: rgba(0, 128, 0, 1)">--></span> <span style="color: rgba(0, 0, 255, 1)"><</span><span style="color: rgba(128, 0, 0, 1)">tx:advice </span><span style="color: rgba(255, 0, 0, 1)">id</span><span style="color: rgba(0, 0, 255, 1)">="transactionAdvice"</span><span style="color: rgba(255, 0, 0, 1)"> transaction-manager</span><span style="color: rgba(0, 0, 255, 1)">="transactionManager"</span><span style="color: rgba(0, 0, 255, 1)">></span> <span style="color: rgba(0, 0, 255, 1)"><</span><span style="color: rgba(128, 0, 0, 1)">tx:attributes</span><span style="color: rgba(0, 0, 255, 1)">></span> <span style="color: rgba(0, 0, 255, 1)"><</span><span style="color: rgba(128, 0, 0, 1)">tx:method </span><span style="color: rgba(255, 0, 0, 1)">name</span><span style="color: rgba(0, 0, 255, 1)">="add*"</span><span style="color: rgba(255, 0, 0, 1)"> propagation</span><span style="color: rgba(0, 0, 255, 1)">="REQUIRED"</span> <span style="color: rgba(0, 0, 255, 1)">/></span> <span style="color: rgba(0, 0, 255, 1)"><</span><span style="color: rgba(128, 0, 0, 1)">tx:method </span><span style="color: rgba(255, 0, 0, 1)">name</span><span style="color: rgba(0, 0, 255, 1)">="append*"</span><span style="color: rgba(255, 0, 0, 1)"> propagation</span><span style="color: rgba(0, 0, 255, 1)">="REQUIRED"</span> <span style="color: rgba(0, 0, 255, 1)">/></span> <span style="color: rgba(0, 0, 255, 1)"><</span><span style="color: rgba(128, 0, 0, 1)">tx:method </span><span style="color: rgba(255, 0, 0, 1)">name</span><span style="color: rgba(0, 0, 255, 1)">="insert*"</span><span style="color: rgba(255, 0, 0, 1)"> propagation</span><span style="color: rgba(0, 0, 255, 1)">="REQUIRED"</span> <span style="color: rgba(0, 0, 255, 1)">/></span> <span style="color: rgba(0, 0, 255, 1)"><</span><span style="color: rgba(128, 0, 0, 1)">tx:method </span><span style="color: rgba(255, 0, 0, 1)">name</span><span style="color: rgba(0, 0, 255, 1)">="save*"</span><span style="color: rgba(255, 0, 0, 1)"> propagation</span><span style="color: rgba(0, 0, 255, 1)">="REQUIRED"</span> <span style="color: rgba(0, 0, 255, 1)">/></span> <span style="color: rgba(0, 0, 255, 1)"><</span><span style="color: rgba(128, 0, 0, 1)">tx:method </span><span style="color: rgba(255, 0, 0, 1)">name</span><span style="color: rgba(0, 0, 255, 1)">="update*"</span><span style="color: rgba(255, 0, 0, 1)"> propagation</span><span style="color: rgba(0, 0, 255, 1)">="REQUIRED"</span> <span style="color: rgba(0, 0, 255, 1)">/></span> <span style="color: rgba(0, 0, 255, 1)"><</span><span style="color: rgba(128, 0, 0, 1)">tx:method </span><span style="color: rgba(255, 0, 0, 1)">name</span><span style="color: rgba(0, 0, 255, 1)">="modify*"</span><span style="color: rgba(255, 0, 0, 1)"> propagation</span><span style="color: rgba(0, 0, 255, 1)">="REQUIRED"</span> <span style="color: rgba(0, 0, 255, 1)">/></span> <span style="color: rgba(0, 0, 255, 1)"><</span><span style="color: rgba(128, 0, 0, 1)">tx:method </span><span style="color: rgba(255, 0, 0, 1)">name</span><span style="color: rgba(0, 0, 255, 1)">="edit*"</span><span style="color: rgba(255, 0, 0, 1)"> propagation</span><span style="color: rgba(0, 0, 255, 1)">="REQUIRED"</span> <span style="color: rgba(0, 0, 255, 1)">/></span> <span style="color: rgba(0, 0, 255, 1)"><</span><span style="color: rgba(128, 0, 0, 1)">tx:method </span><span style="color: rgba(255, 0, 0, 1)">name</span><span style="color: rgba(0, 0, 255, 1)">="delete*"</span><span style="color: rgba(255, 0, 0, 1)"> propagation</span><span style="color: rgba(0, 0, 255, 1)">="REQUIRED"</span> <span style="color: rgba(0, 0, 255, 1)">/></span> <span style="color: rgba(0, 0, 255, 1)"><</span><span style="color: rgba(128, 0, 0, 1)">tx:method </span><span style="color: rgba(255, 0, 0, 1)">name</span><span style="color: rgba(0, 0, 255, 1)">="remove*"</span><span style="color: rgba(255, 0, 0, 1)"> propagation</span><span style="color: rgba(0, 0, 255, 1)">="REQUIRED"</span> <span style="color: rgba(0, 0, 255, 1)">/></span> <span style="color: rgba(0, 0, 255, 1)"><</span><span style="color: rgba(128, 0, 0, 1)">tx:method </span><span style="color: rgba(255, 0, 0, 1)">name</span><span style="color: rgba(0, 0, 255, 1)">="repair"</span><span style="color: rgba(255, 0, 0, 1)"> propagation</span><span style="color: rgba(0, 0, 255, 1)">="REQUIRED"</span> <span style="color: rgba(0, 0, 255, 1)">/></span> <span style="color: rgba(0, 0, 255, 1)"><</span><span style="color: rgba(128, 0, 0, 1)">tx:method </span><span style="color: rgba(255, 0, 0, 1)">name</span><span style="color: rgba(0, 0, 255, 1)">="delAndRepair"</span><span style="color: rgba(255, 0, 0, 1)"> propagation</span><span style="color: rgba(0, 0, 255, 1)">="REQUIRED"</span> <span style="color: rgba(0, 0, 255, 1)">/></span> <span style="color: rgba(0, 0, 255, 1)"><</span><span style="color: rgba(128, 0, 0, 1)">tx:method </span><span style="color: rgba(255, 0, 0, 1)">name</span><span style="color: rgba(0, 0, 255, 1)">="get*"</span><span style="color: rgba(255, 0, 0, 1)"> propagation</span><span style="color: rgba(0, 0, 255, 1)">="SUPPORTS"</span> <span style="color: rgba(0, 0, 255, 1)">/></span> <span style="color: rgba(0, 0, 255, 1)"><</span><span style="color: rgba(128, 0, 0, 1)">tx:method </span><span style="color: rgba(255, 0, 0, 1)">name</span><span style="color: rgba(0, 0, 255, 1)">="find*"</span><span style="color: rgba(255, 0, 0, 1)"> propagation</span><span style="color: rgba(0, 0, 255, 1)">="SUPPORTS"</span> <span style="color: rgba(0, 0, 255, 1)">/></span> <span style="color: rgba(0, 0, 255, 1)"><</span><span style="color: rgba(128, 0, 0, 1)">tx:method </span><span style="color: rgba(255, 0, 0, 1)">name</span><span style="color: rgba(0, 0, 255, 1)">="load*"</span><span style="color: rgba(255, 0, 0, 1)"> propagation</span><span style="color: rgba(0, 0, 255, 1)">="SUPPORTS"</span> <span style="color: rgba(0, 0, 255, 1)">/></span> <span style="color: rgba(0, 0, 255, 1)"><</span><span style="color: rgba(128, 0, 0, 1)">tx:method </span><span style="color: rgba(255, 0, 0, 1)">name</span><span style="color: rgba(0, 0, 255, 1)">="search*"</span><span style="color: rgba(255, 0, 0, 1)"> propagation</span><span style="color: rgba(0, 0, 255, 1)">="SUPPORTS"</span> <span style="color: rgba(0, 0, 255, 1)">/></span> <span style="color: rgba(0, 0, 255, 1)"><</span><span style="color: rgba(128, 0, 0, 1)">tx:method </span><span style="color: rgba(255, 0, 0, 1)">name</span><span style="color: rgba(0, 0, 255, 1)">="datagrid*"</span><span style="color: rgba(255, 0, 0, 1)"> propagation</span><span style="color: rgba(0, 0, 255, 1)">="SUPPORTS"</span> <span style="color: rgba(0, 0, 255, 1)">/></span> <span style="color: rgba(0, 0, 255, 1)"><</span><span style="color: rgba(128, 0, 0, 1)">tx:method </span><span style="color: rgba(255, 0, 0, 1)">name</span><span style="color: rgba(0, 0, 255, 1)">="*"</span><span style="color: rgba(255, 0, 0, 1)"> propagation</span><span style="color: rgba(0, 0, 255, 1)">="SUPPORTS"</span> <span style="color: rgba(0, 0, 255, 1)">/></span> <span style="color: rgba(0, 0, 255, 1)"></</span><span style="color: rgba(128, 0, 0, 1)">tx:attributes</span><span style="color: rgba(0, 0, 255, 1)">></span> <span style="color: rgba(0, 0, 255, 1)"></</span><span style="color: rgba(128, 0, 0, 1)">tx:advice</span><span style="color: rgba(0, 0, 255, 1)">></span> <span style="color: rgba(0, 0, 255, 1)"><</span><span style="color: rgba(128, 0, 0, 1)">aop:config</span><span style="color: rgba(0, 0, 255, 1)">></span> <span style="color: rgba(0, 0, 255, 1)"><</span><span style="color: rgba(128, 0, 0, 1)">aop:pointcut </span><span style="color: rgba(255, 0, 0, 1)">id</span><span style="color: rgba(0, 0, 255, 1)">="transactionPointcut"</span><span style="color: rgba(255, 0, 0, 1)"> expression</span><span style="color: rgba(0, 0, 255, 1)">="execution(* me.gacl.service..*Impl.*(..))"</span> <span style="color: rgba(0, 0, 255, 1)">/></span> <span style="color: rgba(0, 0, 255, 1)"><</span><span style="color: rgba(128, 0, 0, 1)">aop:advisor </span><span style="color: rgba(255, 0, 0, 1)">pointcut-ref</span><span style="color: rgba(0, 0, 255, 1)">="transactionPointcut"</span><span style="color: rgba(255, 0, 0, 1)"> advice-ref</span><span style="color: rgba(0, 0, 255, 1)">="transactionAdvice"</span> <span style="color: rgba(0, 0, 255, 1)">/></span> <span style="color: rgba(0, 0, 255, 1)"></</span><span style="color: rgba(128, 0, 0, 1)">aop:config</span><span style="color: rgba(0, 0, 255, 1)">></span> <span style="color: rgba(0, 128, 0, 1)"><!--</span><span style="color: rgba(0, 128, 0, 1)"> 配置druid监控spring jdbc </span><span style="color: rgba(0, 128, 0, 1)">--></span> <span style="color: rgba(0, 0, 255, 1)"><</span><span style="color: rgba(128, 0, 0, 1)">bean </span><span style="color: rgba(255, 0, 0, 1)">id</span><span style="color: rgba(0, 0, 255, 1)">="druid-stat-interceptor"</span><span style="color: rgba(255, 0, 0, 1)"> class</span><span style="color: rgba(0, 0, 255, 1)">="com.alibaba.druid.support.spring.stat.DruidStatInterceptor"</span><span style="color: rgba(0, 0, 255, 1)">></span> <span style="color: rgba(0, 0, 255, 1)"></</span><span style="color: rgba(128, 0, 0, 1)">bean</span><span style="color: rgba(0, 0, 255, 1)">></span> <span style="color: rgba(0, 0, 255, 1)"><</span><span style="color: rgba(128, 0, 0, 1)">bean </span><span style="color: rgba(255, 0, 0, 1)">id</span><span style="color: rgba(0, 0, 255, 1)">="druid-stat-pointcut"</span><span style="color: rgba(255, 0, 0, 1)"> class</span><span style="color: rgba(0, 0, 255, 1)">="org.springframework.aop.support.JdkRegexpMethodPointcut"</span><span style="color: rgba(255, 0, 0, 1)"> scope</span><span style="color: rgba(0, 0, 255, 1)">="prototype"</span><span style="color: rgba(0, 0, 255, 1)">></span> <span style="color: rgba(0, 0, 255, 1)"><</span><span style="color: rgba(128, 0, 0, 1)">property </span><span style="color: rgba(255, 0, 0, 1)">name</span><span style="color: rgba(0, 0, 255, 1)">="patterns"</span><span style="color: rgba(0, 0, 255, 1)">></span> <span style="color: rgba(0, 0, 255, 1)"><</span><span style="color: rgba(128, 0, 0, 1)">list</span><span style="color: rgba(0, 0, 255, 1)">></span> <span style="color: rgba(0, 0, 255, 1)"><</span><span style="color: rgba(128, 0, 0, 1)">value</span><span style="color: rgba(0, 0, 255, 1)">></span>me.gacl.service.*<span style="color: rgba(0, 0, 255, 1)"></</span><span style="color: rgba(128, 0, 0, 1)">value</span><span style="color: rgba(0, 0, 255, 1)">></span> <span style="color: rgba(0, 0, 255, 1)"></</span><span style="color: rgba(128, 0, 0, 1)">list</span><span style="color: rgba(0, 0, 255, 1)">></span> <span style="color: rgba(0, 0, 255, 1)"></</span><span style="color: rgba(128, 0, 0, 1)">property</span><span style="color: rgba(0, 0, 255, 1)">></span> <span style="color: rgba(0, 0, 255, 1)"></</span><span style="color: rgba(128, 0, 0, 1)">bean</span><span style="color: rgba(0, 0, 255, 1)">></span> <span style="color: rgba(0, 0, 255, 1)"><</span><span style="color: rgba(128, 0, 0, 1)">aop:config</span><span style="color: rgba(0, 0, 255, 1)">></span> <span style="color: rgba(0, 0, 255, 1)"><</span><span style="color: rgba(128, 0, 0, 1)">aop:advisor </span><span style="color: rgba(255, 0, 0, 1)">advice-ref</span><span style="color: rgba(0, 0, 255, 1)">="druid-stat-interceptor"</span><span style="color: rgba(255, 0, 0, 1)"> pointcut-ref</span><span style="color: rgba(0, 0, 255, 1)">="druid-stat-pointcut"</span> <span style="color: rgba(0, 0, 255, 1)">/></span> <span style="color: rgba(0, 0, 255, 1)"></</span><span style="color: rgba(128, 0, 0, 1)">aop:config</span><span style="color: rgba(0, 0, 255, 1)">></span></beans>
到此，相关的配置文件算是编写完成了，如下图所示：
4.3、进行单元测试
经过以上两个步骤，spring4 与 mybatis3 的整合算是全部完成了。接下来我们要做的工作就算进行单元测试，测试一下 spring4 与 mybatis3 的整合是否成功。
1、在 src/main/java 目录下创建一个 me.gacl.service 包，然后在 me.gacl.service 包创建一个 UserServiceI 接口，如下所示：
1 package me.gacl.service; 2 3 import me.gacl.domain.User; 4 5 public interface UserServiceI { 6 7 /** 8 * 添加用户 9 * @param user 10 */ 11 void addUser(User user); 12 13 /** 14 * 根据用户 id 获取用户 15 * @param userId 16 * @return 17 */ 18 User getUserById(String userId); 19 }
2、在 src/main/java 目录下创建一个 me.gacl.service.impl 包，然后在 me.gacl.service.impl 包创建一个针对 UserServiceI 接口的实现类：UserServiceImpl，如下所示：
1 package me.gacl.service.impl; 2 3 import org.springframework.beans.factory.annotation.Autowired; 4 import org.springframework.stereotype.Service; 5 import me.gacl.dao.UserMapper; 6 import me.gacl.domain.User; 7 import me.gacl.service.UserServiceI; 8 9 /** 10 * @author gacl 11 * 使用 @Service 注解将 UserServiceImpl 类标注为一个 service 12 * service 的 id 是 userService 13 */ 14 @Service("userService") 15 public class UserServiceImpl implements UserServiceI { 16 17 /** 18 * 使用 @Autowired 注解标注 userMapper 变量， 19 * 当需要使用 UserMapper 时，Spring 就会自动注入 UserMapper 20 */ 21 @Autowired 22 private UserMapper userMapper;//注入 dao 23 24 @Override 25 public void addUser(User user) { 26 userMapper.insert(user); 27 } 28 29 @Override 30 public User getUserById(String userId) { 31 return userMapper.selectByPrimaryKey(userId); 32 } 33 }
创建好的两个类如下所示：
3、在 src/test/java 目录下编写单元测试类，新建一个 me.gacl.test 包，然后在这个包下创建一个 MyBatisTest 类，代码如下：
1 package me.gacl.test; 2 3 import java.util.Date; 4 import java.util.UUID; 5 import me.gacl.domain.User; 6 import me.gacl.service.UserServiceI; 7 //import me.gacl.service.UserServiceI; 8 import org.junit.Before; 9 import org.junit.Test; 10 import org.springframework.context.ApplicationContext; 11 import org.springframework.context.support.ClassPathXmlApplicationContext; 12 13 public class MyBatisTest { 14 15 private UserServiceI userService; 16 17 /** 18 * 这个 before 方法在所有的测试方法之前执行，并且只执行一次 19 * 所有做 Junit 单元测试时一些初始化工作可以在这个方法里面进行 20 * 比如在 before 方法里面初始化 ApplicationContext 和 userService 21 */ 22 @Before 23 public void before(){ 24 //使用 "spring.xml" 和 "spring-mybatis.xml" 这两个配置文件创建 Spring 上下文 25 ApplicationContext ac = new ClassPathXmlApplicationContext(new String[]{"spring.xml","spring-mybatis.xml"}); 26 //从 Spring 容器中根据 bean 的 id 取出我们要使用的 userService 对象 27 userService = (UserServiceI) ac.getBean("userService"); 28 } 29 30 @Test 31 public void testAddUser(){ 32 //ApplicationContext ac = new ClassPathXmlApplicationContext(new String[]{"spring.xml","spring-mybatis.xml"}); 33 //UserServiceI userService = (UserServiceI) ac.getBean("userService"); 34 User user = new User(); 35 user.setUserId(UUID.randomUUID().toString().replaceAll("-", "")); 36 user.setUserName("白虎神皇 xdp"); 37 user.setUserBirthday(new Date()); 38 user.setUserSalary(10000D); 39 userService.addUser(user); 40 } 41 42 }
执行单元测试代码，这时候会报如下错误：
错误提示是说没有找到 "me.gacl.test.MyBatisTest" 这个类，这是因为我们没有使用 maven 编译项目中的类的缘故。
下面我们使用 Maven 编译项目，选中项目的 pom.xml 文件→【Debug As】→【maven install】，如下所示：
编译结果如下：
在这里说一下我执行 Maven install 之后遇到的问题，第一次执行 Maven install 命令时，就出现了如下一堆乱七八糟的错误：
后来我把项目删掉，再重新导入项目，然后再执行 Clean 项目操作之后，如下图所示：
再执行 Maven install 操作又可以正常编译通过了，这让我郁闷了好久，这应该不是我项目配置的原因，而是 Maven 的原因，具体也不知道为啥会这样。反正这算是一种解决办法吧，如果遇到执行 Maven install 操作不能正常编译通过的情况：可以尝试采用：Maven clean→Clean 项目→Maven install 这三个步骤去解决问题。
除了可以用常规的 Junit 进行单元测试之外，我们还可以使用 Spring 提供的 Junit 测试框架进行单元测试，在 me.gacl.test 下新建一个 MyBatisTestBySpringTestFramework 类，代码如下：
1 package me.gacl.test; 2 3 import java.util.Date; 4 import java.util.UUID; 5 import me.gacl.domain.User; 6 import me.gacl.service.UserServiceI; 7 import org.junit.Test; 8 import org.junit.runner.RunWith; 9 import org.springframework.beans.factory.annotation.Autowired; 10 import org.springframework.test.context.ContextConfiguration; 11 import org.springframework.test.context.junit4.SpringJUnit4ClassRunner; 12 13 @RunWith(SpringJUnit4ClassRunner.class) 14 //配置了 @ContextConfiguration 注解并使用该注解的 locations 属性指明 spring 和配置文件之后， 15 @ContextConfiguration(locations = {"classpath:spring.xml", "classpath:spring-mybatis.xml" }) 16 public class MyBatisTestBySpringTestFramework { 17 18 //注入 userService 19 @Autowired 20 private UserServiceI userService; 21 22 @Test 23 public void testAddUser(){ 24 User user = new User(); 25 user.setUserId(UUID.randomUUID().toString().replaceAll("-", "")); 26 user.setUserName("xdp_gacl_ 白虎神皇"); 27 user.setUserBirthday(new Date()); 28 user.setUserSalary(10000D); 29 userService.addUser(user); 30 } 31 32 @Test 33 public void testGetUserById(){ 34 String userId = "fb1c5941094e400b975f10d9a9d602a3"; 35 User user = userService.getUserById(userId); 36 System.out.println(user.getUserName()); 37 } 38 }
执行这两个测试方法，是可以正常测试通过的，如下所示：
到此，我们框架的整合测试工作就算是全部通过了，整合成功。
4.4、在 web 服务器中进行测试
1、编辑 web.xml 文件，添加 spring 监听器配置项，内容如下：
<?xml version="1.0" encoding="UTF-8"?> <web-app xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" version="3.0"> <welcome-file-list> <welcome-file>index.jsp</welcome-file> </welcome-file-list><span style="color: rgba(0, 0, 255, 1)"><</span><span style="color: rgba(128, 0, 0, 1)">listener</span><span style="color: rgba(0, 0, 255, 1)">></span> <span style="color: rgba(0, 0, 255, 1)"><</span><span style="color: rgba(128, 0, 0, 1)">description</span><span style="color: rgba(0, 0, 255, 1)">></span>Spring监听器<span style="color: rgba(0, 0, 255, 1)"></</span><span style="color: rgba(128, 0, 0, 1)">description</span><span style="color: rgba(0, 0, 255, 1)">></span> <span style="color: rgba(0, 0, 255, 1)"><</span><span style="color: rgba(128, 0, 0, 1)">listener-class</span><span style="color: rgba(0, 0, 255, 1)">></span>org.springframework.web.context.ContextLoaderListener<span style="color: rgba(0, 0, 255, 1)"></</span><span style="color: rgba(128, 0, 0, 1)">listener-class</span><span style="color: rgba(0, 0, 255, 1)">></span> <span style="color: rgba(0, 0, 255, 1)"></</span><span style="color: rgba(128, 0, 0, 1)">listener</span><span style="color: rgba(0, 0, 255, 1)">></span> <span style="color: rgba(0, 128, 0, 1)"><!--</span><span style="color: rgba(0, 128, 0, 1)"> ContextLoaderListener初始化Spring上下文时需要使用到的contextConfigLocation参数 </span><span style="color: rgba(0, 128, 0, 1)">--></span> <span style="color: rgba(0, 0, 255, 1)"><</span><span style="color: rgba(128, 0, 0, 1)">context-param</span><span style="color: rgba(0, 0, 255, 1)">></span> <span style="color: rgba(0, 0, 255, 1)"><</span><span style="color: rgba(128, 0, 0, 1)">param-name</span><span style="color: rgba(0, 0, 255, 1)">></span>contextConfigLocation<span style="color: rgba(0, 0, 255, 1)"></</span><span style="color: rgba(128, 0, 0, 1)">param-name</span><span style="color: rgba(0, 0, 255, 1)">></span> <span style="color: rgba(0, 128, 0, 1)"><!--</span><span style="color: rgba(0, 128, 0, 1)"> 配置spring.xml和spring-mybatis.xml这两个配置文件的位置，固定写法 </span><span style="color: rgba(0, 128, 0, 1)">--></span> <span style="color: rgba(0, 0, 255, 1)"><</span><span style="color: rgba(128, 0, 0, 1)">param-value</span><span style="color: rgba(0, 0, 255, 1)">></span>classpath:spring.xml,classpath:spring-mybatis.xml<span style="color: rgba(0, 0, 255, 1)"></</span><span style="color: rgba(128, 0, 0, 1)">param-value</span><span style="color: rgba(0, 0, 255, 1)">></span> <span style="color: rgba(0, 0, 255, 1)"></</span><span style="color: rgba(128, 0, 0, 1)">context-param</span><span style="color: rgba(0, 0, 255, 1)">></span></web-app>
2、在 UserMapper 接口中添加一个获取所有用户信息的 getAllUser() 方法，如下所示：
1 package me.gacl.dao; 2 3 import java.util.List; 4 5 import me.gacl.domain.User; 6 7 public interface UserMapper { 8 int deleteByPrimaryKey(String userId); 9 10 int insert(User record); 11 12 int insertSelective(User record); 13 14 User selectByPrimaryKey(String userId); 15 16 int updateByPrimaryKeySelective(User record); 17 18 int updateByPrimaryKey(User record); 19 20 /**获取所有用户信息 21 * @return List<User> 22 */ 23 List<User> getAllUser(); 24 }
3、在 UserMapper.xml 文件中编写 getAllUser() 方法要执行的 SQL 语句，如下所示：
<?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" > <mapper namespace="me.gacl.dao.UserMapper" > <resultMap id="BaseResultMap" type="me.gacl.domain.User" > <id column="user_id" property="userId" jdbcType="CHAR" /> <result column="user_name" property="userName" jdbcType="VARCHAR" /> <result column="user_birthday" property="userBirthday" jdbcType="DATE" /> <result column="user_salary" property="userSalary" jdbcType="DOUBLE" /> </resultMap> <sql id="Base_Column_List" > user_id, user_name, user_birthday, user_salary </sql> <select id="selectByPrimaryKey" resultMap="BaseResultMap" parameterType="java.lang.String" > select <include refid="Base_Column_List" /> from t_user where user_id = #{userId,jdbcType=CHAR} </select> <delete id="deleteByPrimaryKey" parameterType="java.lang.String" > delete from t_user where user_id = #{userId,jdbcType=CHAR} </delete> <insert id="insert" parameterType="me.gacl.domain.User" > insert into t_user (user_id, user_name, user_birthday, user_salary)values (#{userId,jdbcType=CHAR}, #{userName,jdbcType=VARCHAR}, #{userBirthday,jdbcType=DATE}, #{userSalary,jdbcType=DOUBLE}) </insert> <insert id="insertSelective" parameterType="me.gacl.domain.User" > insert into t_user <trim prefix="(" suffix=")" suffixOverrides="," > <if test="userId != null" > user_id, </if> <if test="userName != null" > user_name, </if> <if test="userBirthday != null" > user_birthday, </if> <if test="userSalary != null" > user_salary, </if> </trim> <trim prefix="values (" suffix=")" suffixOverrides="," > <if test="userId != null" > #{userId,jdbcType=CHAR}, </if> <if test="userName != null" > #{userName,jdbcType=VARCHAR}, </if> <if test="userBirthday != null" > #{userBirthday,jdbcType=DATE}, </if> <if test="userSalary != null" > #{userSalary,jdbcType=DOUBLE}, </if> </trim> </insert> <update id="updateByPrimaryKeySelective" parameterType="me.gacl.domain.User" > update t_user <set > <if test="userName != null" > user_name = #{userName,jdbcType=VARCHAR}, </if> <if test="userBirthday != null" > user_birthday = #{userBirthday,jdbcType=DATE}, </if> <if test="userSalary != null" > user_salary = #{userSalary,jdbcType=DOUBLE}, </if> </set> where user_id = #{userId,jdbcType=CHAR} </update> <update id="updateByPrimaryKey" parameterType="me.gacl.domain.User" > update t_user set user_name = #{userName,jdbcType=VARCHAR}, user_birthday = #{userBirthday,jdbcType=DATE}, user_salary = #{userSalary,jdbcType=DOUBLE} where user_id = #{userId,jdbcType=CHAR} </update><!-- ============== 以下内容是根据自身业务扩展的内容 ======================= -->
<!-- select 标签的 id 属性与 UserMapper 接口中定义的 getAllUser 方法要一模一样 -->
<select id="getAllUser" resultMap="BaseResultMap">
select user_id, user_name, user_birthday, user_salary from t_user
</select>
</mapper>
4、在 UserServiceI 接口中也添加一个 getAllUser() 方法，如下：
1 package me.gacl.service; 2 3 import java.util.List; 4 5 import me.gacl.domain.User; 6 7 public interface UserServiceI { 8 9 /** 10 * 添加用户 11 * @param user 12 */ 13 void addUser(User user); 14 15 /** 16 * 根据用户 id 获取用户 17 * @param userId 18 * @return 19 */ 20 User getUserById(String userId); 21 22 /**获取所有用户信息 23 * @return List<User> 24 */ 25 List<User> getAllUser(); 26 }
5、在 UserServiceImpl 类中实现 getAllUser 方法，如下：
1 package me.gacl.service.impl; 2 3 import java.util.List; 4 5 import org.springframework.beans.factory.annotation.Autowired; 6 import org.springframework.stereotype.Service; 7 import me.gacl.dao.UserMapper; 8 import me.gacl.domain.User; 9 import me.gacl.service.UserServiceI; 10 11 /** 12 * @author gacl 13 * 使用 @Service 注解将 UserServiceImpl 类标注为一个 service 14 * service 的 id 是 userService 15 */ 16 @Service("userService") 17 public class UserServiceImpl implements UserServiceI { 18 19 /** 20 * 使用 @Autowired 注解标注 userMapper 变量， 21 * 当需要使用 UserMapper 时，Spring 就会自动注入 UserMapper 22 */ 23 @Autowired 24 private UserMapper userMapper;//注入 dao 25 26 @Override 27 public void addUser(User user) { 28 userMapper.insert(user); 29 } 30 31 @Override 32 public User getUserById(String userId) { 33 return userMapper.selectByPrimaryKey(userId); 34 } 35 36 @Override 37 public List<User> getAllUser() { 38 return userMapper.getAllUser(); 39 } 40 }
6、在 src/main/java 目录下创建一个 me.gacl.web.controller 包，然后在 me.gacl.web.controller 下创建一个 UserServlet，如下：
1 package me.gacl.web.controller; 2 3 import java.io.IOException; 4 import java.util.List; 5 6 import javax.servlet.ServletException; 7 import javax.servlet.annotation.WebServlet; 8 import javax.servlet.http.HttpServlet; 9 import javax.servlet.http.HttpServletRequest; 10 import javax.servlet.http.HttpServletResponse; 11 12 import org.springframework.context.ApplicationContext; 13 import org.springframework.web.context.support.WebApplicationContextUtils; 14 15 import me.gacl.domain.User; 16 import me.gacl.service.UserServiceI; 17 18 /** 19 * @author gacl 20 * @WebServlet 是 Servlet3.0 提供的注解，目的是将一个继承了 HttpServlet 类的普通 java 类标注为一个 Servlet 21 * UserServlet 使用了 @WebServlet 标注之后，就不需要在 web.xml 中配置了 22 */ 23 @WebServlet("/UserServlet") 24 public class UserServlet extends HttpServlet { 25 26 //处理业务逻辑的 userService 27 private UserServiceI userService; 28 29 public void doGet(HttpServletRequest request, HttpServletResponse response) 30 throws ServletException, IOException { 31 //获取所有的用户信息 32 List<User> lstUsers = userService.getAllUser(); 33 request.setAttribute("lstUsers", lstUsers); 34 request.getRequestDispatcher("/index.jsp").forward(request, response); 35 } 36 37 public void doPost(HttpServletRequest request, HttpServletResponse response) 38 throws ServletException, IOException { 39 this.doGet(request, response); 40 } 41 42 public void init() throws ServletException { 43 //在 Servlet 初始化时获取 Spring 上下文对象 (ApplicationContext) 44 ApplicationContext ac = WebApplicationContextUtils.getWebApplicationContext(this.getServletContext()); 45 //从 ApplicationContext 中获取 userService 46 userService = (UserServiceI) ac.getBean("userService"); 47 } 48 }
7、编辑 index.jsp 页面，用于展示查询到的用户信息，内容如下：
<%@ page language="java" pageEncoding="UTF-8"%> <%--引入 JSTL 核心标签库 --%> <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%> <!DOCTYPE html> <html> <head> <title>显示用户信息</title> <style type="text/css"> table,td{ border: 1px solid; border-collapse: collapse; } </style> </head> <body> <table> <tr> <td>用户 ID</td> <td>用户名</td> <td>用户生日</td> <td>工资</td> </tr> <%--遍历 lstUsers 集合中的 User 对象 --%> <c:forEach var="user" items="${lstUsers}"> <tr> <td>${user.userId}</td> <td>${user.userName}</td> <td>${user.userBirthday}</td> <td>${user.userSalary}</td> </tr> </c:forEach> </table> </body> </html>
8、执行 maven install 命令编译项目，然后将项目部署到 tomcat 服务器中运行，注意，由于要使用 Servlet3.0，所以必须将项目部署到 tomcat7.x 以上的服务器中去运行，如下所示：
输入地址：http://localhost:8080/spring4-mybatis3/UserServlet 访问 UserServlet，访问结果如下：
可以看到，t_user 表中的用户信息全部查询出来显示到页面上了。这样在 web 服务器中的测试也正常通过了。
以上就是 Spring4.x 与 MyBatis3.x 整合的全部内容了。编写这个整合例子花了不少时间，使用 Maven 编译时总是出现莫名其妙的问题，有时候成功，有时候失败，反正很莫名其妙。如果遇到执行 Maven install 操作不能正常编译通过的情况：可以尝试采用：Maven clean→Clean 项目→Maven install 这三个步骤去解决问题