Spring+SpringMVC+MyBatis深入学习及搭建(十四)——SpringMVC和MyBatis整合
转载请注明出处：http://www.cnblogs.com/Joanna-Yan/p/7010363.html
前面讲到：Spring+SpringMVC+MyBatis 深入学习及搭建 (十三)——SpringMVC 入门程序（二）
1. 需求
使用 springmvc 和 mybatis 完成商品列表查询。
2. 整合思路
springmvc+mybatis 的系统架构：
第一步：整合 dao 层
mybatis 和 spring 整合，通过 spring 管理 mapper 接口。
使用 mapper 的扫描器自动扫描 mapper 接口在 spring 中进行注册。
第二步：整合 service 层
通过 spring 管理 service 接口。
使用配置方式将 service 接口配置在 spring 配置文件中。
实现事务控制。
第三步：整合 springMvc
由于 springmvc 是 spring 的模块，不需要整合。
3. 环境准备
数据库环境：mysql5.6
java 环境：
jdk1.7
MyEclipse2014
springmvc 版本：spring3.2
所需要的 jar 包：
数据库驱动包
mybatis 的 jar 包
mybatis 的 spring 的整合包
log4j 包
dbcp 数据库连接池包
spring3.2 所有 jar 包
jstl 包
过程结构目录：
4. 整合 dao
mybatis 和 spring 进行整合。
4.1 db.properties
jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/mybatisdemo
jdbc.username=root
jdbc.password=
4.2 log4j.properties
# Global logging configuration，建议开发环境要用 debug
log4j.rootLogger=DEBUG, stdout
# Console output...
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%5p [%t] - %m%n
4.3 sqlMapConfig.xml
在 classpath 下创建 mybatis/sqlMapConfig.xml。
<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-config.dtd"> <configuration> <!-- 全局 setting 配置，根据需要添加 --><span style="color: rgba(0, 128, 0, 1)"><!--</span><span style="color: rgba(0, 128, 0, 1)"> 配置别名 </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)">typeAliases</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)"> 批量扫描别名 </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)">package </span><span style="color: rgba(255, 0, 0, 1)">name</span><span style="color: rgba(0, 0, 255, 1)">="joanna.yan.ssm.po"</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)">typeAliases</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mapper 由于使用spring和mybatis的整合包进行mapper扫描，这里不需要配置了。 但是必须遵循：mapper.xml和mapper.java文件同名且在一个目录 </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)"> <mappers></mappers> </span><span style="color: rgba(0, 128, 0, 1)">--></span></configuration>
4.4 applicationContext-dao.xml
在 classpath 下创建 spring/applicationContext-dao.xml。配置：数据源、事务管理、SqlSessionFactory、mapper 扫描器。
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:context="http://www.springframework.org/schema/context" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.2.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.2.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.2.xsd "><span style="color: rgba(0, 128, 0, 1)"><!--</span><span style="color: rgba(0, 128, 0, 1)"> 加载db.properties文件中的内容，db.properties文件中的key命名要有一定的特殊规则 </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:db.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)"> 配置数据源，dbcp </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)">="dataSource"</span><span style="color: rgba(255, 0, 0, 1)"> class</span><span style="color: rgba(0, 0, 255, 1)">="org.apache.commons.dbcp.BasicDataSource"</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)">="driverClassName"</span><span style="color: rgba(255, 0, 0, 1)"> value</span><span style="color: rgba(0, 0, 255, 1)">="${jdbc.driver}"</span><span style="color: rgba(0, 0, 255, 1)">/></span> <span style="color: rgba(0, 0, 255, 1)"><</span><span style="color: rgba(128, 0, 0, 1)">property </span><span style="color: rgba(255, 0, 0, 1)">name</span><span style="color: rgba(0, 0, 255, 1)">="url"</span><span style="color: rgba(255, 0, 0, 1)"> value</span><span style="color: rgba(0, 0, 255, 1)">="${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, 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)">="30"</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)">="maxIdle"</span><span style="color: rgba(255, 0, 0, 1)"> value</span><span style="color: rgba(0, 0, 255, 1)">="5"</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)"> sqlSessinFactory </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)"> 加载mybatis的全局配置文件 </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)">="configLocation"</span><span style="color: rgba(255, 0, 0, 1)"> value</span><span style="color: rgba(0, 0, 255, 1)">="classpath:mybatis/sqlMapConfig.xml"</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)"> 数据库连接池 </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, 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)"> mapper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)"> 扫描包路径，如果需要扫描多个包，中间使用半角逗号隔开 </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)">="joanna.yan.ssm.mapper"</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></beans>
4.5 逆向工程生成 po 类及 mapper（即单表增删改查）
详情见：Spring+SpringMVC+MyBatis 深入学习及搭建 (十)——MyBatis 逆向工程
将生成的文件拷贝至工程中。
4.6 手动定义商品查询 mapper
针对综合查询 mapper，一般情况会有关联查询，建议自定义 mapper。
4.6.1 ItemsMapperCustom.xml
sql 语句：
SELECT * FROM items WHERE items.name LIKE '% 笔记本 %'
<?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="joanna.yan.ssm.mapper.ItemsMapperCustom" > <!-- 定义商品查询的 sql 片段，就是商品查询条件 --> <sql id="query_items_where"> <!-- 使用动态 sql，通过 if 判断，满足条件进行 sql 拼接 --> <!-- 商品查询条件通过 ItemsQueryVo 包装对象中 itemsCustom 属性传递 --> <if test="itemsCustom!=null"> <if test="itemsCustom.name!=null and itemsCustom.name!=''"> items.name LIKE '%${itemsCustom.name}%' </if> </if> </sql><span style="color: rgba(0, 128, 0, 1)"><!--</span><span style="color: rgba(0, 128, 0, 1)"> 商品列表查询 </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)"> parameterType传入包装对象（包装了查询条件） resultType建议使用扩展对象 </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)">select </span><span style="color: rgba(255, 0, 0, 1)">id</span><span style="color: rgba(0, 0, 255, 1)">="findItemsList"</span><span style="color: rgba(255, 0, 0, 1)"> parameterType</span><span style="color: rgba(0, 0, 255, 1)">="joanna.yan.ssm.po.ItemsQueryVo"</span><span style="color: rgba(255, 0, 0, 1)"> resultType</span><span style="color: rgba(0, 0, 255, 1)">="joanna.yan.ssm.po.ItemsCustom"</span><span style="color: rgba(0, 0, 255, 1)">></span><span style="color: rgba(0, 0, 0, 1)"> SELECT items.* FROM items </span><span style="color: rgba(0, 0, 255, 1)"><</span><span style="color: rgba(128, 0, 0, 1)">where</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)">include </span><span style="color: rgba(255, 0, 0, 1)">refid</span><span style="color: rgba(0, 0, 255, 1)">="query_items_where"</span><span style="color: rgba(0, 0, 255, 1)">></</span><span style="color: rgba(128, 0, 0, 1)">include</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)">where</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)">select</span><span style="color: rgba(0, 0, 255, 1)">></span></mapper>
4.6.2 ItemsMapperCustom.java
public interface ItemsMapperCustom { //商品查询列表 public List<ItemsCustom> findItemsList(ItemsQueryVo itemsQueryVo) throws Exception; }
5. 整合 service
让 spring 管理 service 接口。
5.1 定义 service 接口
package joanna.yan.ssm.service;import java.util.List;
import joanna.yan.ssm.po.ItemsCustom;
import joanna.yan.ssm.po.ItemsQueryVo;public interface ItemsService {
//商品查询列表
public List<ItemsCustom> findItemsList(ItemsQueryVo itemsQueryVo) throws Exception;
}
package joanna.yan.ssm.service.impl;import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import joanna.yan.ssm.mapper.ItemsMapperCustom;
import joanna.yan.ssm.po.ItemsCustom;
import joanna.yan.ssm.po.ItemsQueryVo;
import joanna.yan.ssm.service.ItemsService;public class ItemsServiceImpl implements ItemsService{
@Autowired </span><span style="color: rgba(0, 0, 255, 1)">private</span><span style="color: rgba(0, 0, 0, 1)"> ItemsMapperCustom itemsMapperCustom; @Override </span><span style="color: rgba(0, 0, 255, 1)">public</span> List<ItemsCustom><span style="color: rgba(0, 0, 0, 1)"> findItemsList(ItemsQueryVo itemsQueryVo) </span><span style="color: rgba(0, 0, 255, 1)">throws</span><span style="color: rgba(0, 0, 0, 1)"> Exception { </span><span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)">通过ItemsMapperCustom查询数据库</span> <span style="color: rgba(0, 0, 255, 1)">return</span><span style="color: rgba(0, 0, 0, 1)"> itemsMapperCustom.findItemsList(itemsQueryVo); }}
5.2 在 spring 容器配置 service（applicationContext-service.xml）
在 classpath 下创建 spring/applicationContext-service.xml，文件中配置 service。
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:context="http://www.springframework.org/schema/context" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.2.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.2.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.2.xsd "><span style="color: rgba(0, 128, 0, 1)"><!--</span><span style="color: rgba(0, 128, 0, 1)"> 商品管理的service </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)">="itemsService"</span><span style="color: rgba(255, 0, 0, 1)"> class</span><span style="color: rgba(0, 0, 255, 1)">="joanna.yan.ssm.service.impl.ItemsServiceImpl"</span><span style="color: rgba(0, 0, 255, 1)">/></span></beans>
5.3 事务控制（applicationContext-transaction.xml）
在 classpath 下创建 spring/applicationContext-service.xml，文件中使用 spring 声明式事务控制方法。
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:context="http://www.springframework.org/schema/context" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.2.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.2.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.2.xsd "><span style="color: rgba(0, 128, 0, 1)"><!--</span><span style="color: rgba(0, 128, 0, 1)"> 事务管理器 对mybatis操作数据库事务控制，spring使用jdbc的事务控制类 </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)">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, 128, 0, 1)"><!--</span><span style="color: rgba(0, 128, 0, 1)"> 数据源 dataSource在applicationContext-dao.xml中配置了 </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, 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)"> 通知 </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)">="txAdvice"</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, 128, 0, 1)"><!--</span><span style="color: rgba(0, 128, 0, 1)"> 传播行为 </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)"> 可以变相的规范程序员的命名，例如以save开头，update开头等，不能想怎么命名就怎么命名 </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: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, 128, 0, 1)"><!--</span><span style="color: rgba(0, 128, 0, 1)"> 要求 </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: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)">="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)">="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)">="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(255, 0, 0, 1)"> read-only</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)"> 支持，如果没有就算了 </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: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(255, 0, 0, 1)"> read-only</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, 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)">="select*"</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(255, 0, 0, 1)"> read-only</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, 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, 128, 0, 1)"><!--</span><span style="color: rgba(0, 128, 0, 1)"> aop </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)">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)"> 切入点为joanna.yan.ssm.service.impl包下所有类的所有方法，不管里面什么参数 </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)">aop:advisor </span><span style="color: rgba(255, 0, 0, 1)">advice-ref</span><span style="color: rgba(0, 0, 255, 1)">="txAdvice"</span><span style="color: rgba(255, 0, 0, 1)"> pointcut</span><span style="color: rgba(0, 0, 255, 1)">="execution(* joanna.yan.ssm.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:config</span><span style="color: rgba(0, 0, 255, 1)">></span></beans>
6. 整合 springmvc
6.1 springmvc.xml
在 classpath 下创建 spring/springvc.xml 文件，配置处理器映射器、适配器、视图解析器。
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:context="http://www.springframework.org/schema/context" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.2.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.2.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.2.xsd "><span style="color: rgba(0, 128, 0, 1)"><!--</span><span style="color: rgba(0, 128, 0, 1)"> 可以扫描controller、service、... 这里让扫描controller,指定controller的包 </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)">="joanna.yan.ssm.controller"</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(0, 0, 255, 1)">></span> <span style="color: rgba(0, 128, 0, 1)"><!--</span><span style="color: rgba(0, 128, 0, 1)">注解映射器 </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 class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping"/> </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)">注解适配器 </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 class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter"/> </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)">使用mvc:annotation-driven代替上边注解映射器和注解适配器 配置 mvc:annotation-driven默认加载很多的参数绑定方法， 比如json转换解析器就默认加载了，如果使用mvc:annotation-driven就不用配置上面的RequestMappingHandlerMapping和RequestMappingHandlerAdapter 实际开发时使用mvc:annotation-driven </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)">mvc:annotation-driven</span><span style="color: rgba(0, 0, 255, 1)">></</span><span style="color: rgba(128, 0, 0, 1)">mvc:annotation-driven</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)"> 配置视图解析器 解析jsp视图，默认使用jstl标签，所有classpath下得有jstl的包 </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.springframework.web.servlet.view.InternalResourceViewResolver"</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jsp路径的前缀 </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)">="prefix"</span><span style="color: rgba(255, 0, 0, 1)"> value</span><span style="color: rgba(0, 0, 255, 1)">="/WEB-INF/jsp/"</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jsp路径的后缀 </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)">="suffix"</span><span style="color: rgba(255, 0, 0, 1)"> value</span><span style="color: rgba(0, 0, 255, 1)">=".jsp"</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></beans>
6.2 配置前端控制器
参考入门程序：Spring+SpringMVC+MyBatis 深入学习及搭建 (十二)——SpringMVC 入门程序（一）
在 web.xml 中配置：
<?xml version="1.0" encoding="UTF-8"?> <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0"> <display-name>SpringMVC_MyBatis</display-name> <welcome-file-list> <welcome-file>index.jsp</welcome-file> </welcome-file-list><!-- springmvc 前端控制器 -->
<servlet>
<servlet-name>springmvc</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<!-- contextConfigLocation 配置 springmvc 加载的配置文件（该配置文件中配置了处理器映射器、适配器等等）
如果不配置 contextConfigLocation，默认加载的是 /WEB-INF/servlet 名称 -servlet.xml（即 springmvc-servlet.xml）
-->
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring/springmvc.xml</param-value>
</init-param>
<!-- 表示 servlet 随服务启动 -->
<load-on-startup>1</load-on-startup>
</servlet><servlet-mapping>
<servlet-name>springmvc</servlet-name>
<!--Servlet 拦截方式
方式一：.action，访问以.action 结尾由 DispatcherServlet 进行解析
方式二：/，所有访问的地址都由 DispatcherServlet 进行解析，对于静态文件的解析需要配置不让 DispatcherServlet 进行解析。
使用此方式可以实现 RESTful 风格的 url
方式三：/，这样配置不对，使用这种配置，最终要转发到一个 jsp 页面时，
仍然会由 DispatcherServlet 解析 jsp 地址，不能根据 jsp 页面找到 handler，会报错
-->
<url-pattern>*.action</url-pattern>
</servlet-mapping></web-app>
6.3 编写 Controller（就是 Handler）
@Controller public class ItemsController {@Autowired </span><span style="color: rgba(0, 0, 255, 1)">private</span><span style="color: rgba(0, 0, 0, 1)"> ItemsService itemsService; </span><span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)">商品查询http:</span><span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)">localhost:8080/SpringMVC_MyBatis/queryItems.action</span> @RequestMapping("/queryItems"<span style="color: rgba(0, 0, 0, 1)">) </span><span style="color: rgba(0, 0, 255, 1)">public</span> ModelAndView queryItems() <span style="color: rgba(0, 0, 255, 1)">throws</span><span style="color: rgba(0, 0, 0, 1)"> Exception{ </span><span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)">调用service查找数据库，查询商品列表</span> List<ItemsCustom> itemsList=itemsService.findItemsList(<span style="color: rgba(0, 0, 255, 1)">null</span><span style="color: rgba(0, 0, 0, 1)">); </span><span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)">返回ModelAndView</span> ModelAndView modelAndView=<span style="color: rgba(0, 0, 255, 1)">new</span><span style="color: rgba(0, 0, 0, 1)"> ModelAndView(); modelAndView.addObject(</span>"itemsList"<span style="color: rgba(0, 0, 0, 1)">, itemsList); </span><span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)">指定视图// modelAndView.setViewName("/WEB-INF/jsp/items/itemsList.jsp");
//下边的路径，如果在视图解析器中配置 jsp 路径的前缀和 jsp 路径的后缀，修改为
modelAndView.setViewName("items/itemsList");
return modelAndView;
}
}
6.4 编写 jsp
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %> <%@ taglib uri="http://java.sun.com/jsp/jstl/fmt" prefix="fmt"%> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>查询商品列表</title> </head> <body> <form action="${pageContext.request.contextPath}/item/queryItem.action" method="post"> 查询条件： <table width="100%" border=1> <tr> <td><input type="submit" value="查询"/></td> </tr> </table> 商品列表： <table width="100%" border=1> <tr> <td>商品名称</td> <td>商品价格</td> <td>生产日期</td> <td>商品描述</td> <td>操作</td> </tr> <c:forEach items="${itemsList}" var="item"> <tr> <td>${item.name}</td> <td>${item.price}</td> <td><fmt:formatDate value="${item.createtime}" pattern="yyyy-MM-dd HH🇲🇲ss"/></td> <td>${item.detail}</td><span style="color: rgba(0, 0, 255, 1)"><</span><span style="color: rgba(128, 0, 0, 1)">td</span><span style="color: rgba(0, 0, 255, 1)">><</span><span style="color: rgba(128, 0, 0, 1)">a </span><span style="color: rgba(255, 0, 0, 1)">href</span><span style="color: rgba(0, 0, 255, 1)">="${pageContext.request.contextPath }/item/editItem.action?id=${item.id}"</span><span style="color: rgba(0, 0, 255, 1)">></span>修改<span style="color: rgba(0, 0, 255, 1)"></</span><span style="color: rgba(128, 0, 0, 1)">a</span><span style="color: rgba(0, 0, 255, 1)">></</span><span style="color: rgba(128, 0, 0, 1)">td</span><span style="color: rgba(0, 0, 255, 1)">></span></tr>
</c:forEach></table>
</form>
</body></html>
7. 加载 spring 容器
将 mapper、service、controller 加载到 spring 容器中。
建议使用通配符加载上边的配置文件。
在 web.xml 中添加 spring 容器监听器，加载 spring 容器。
<!-- 加载 spring 容器 --> <context-param> <param-name>contextConfigLocation</param-name> <param-value>/WEB-INF/classes/spring/applicationContext-*.xml</param-value> </context-param> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener>
8. 商品查询调试
访问地址：http://localhost:8080/SpringMVC_MyBatis/queryItems.action
查询结果：
注意：在进行项目发布时，报错
javax.servlet.ServletException: Servlet.init() for servlet springmvc threw exception org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:505) org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103) org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950) org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:423) org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1079) org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:620) org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:316) java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) java.lang.Thread.run(Thread.java:745)
原因：服务器上 Tomcat 的 jdk 版本过高是 1.8，而 Spring 的 jar 是 3.2。
解决：降低 jdk 版本至 1.7 或将 Spring 的 jar 升至 4.0 及以上。
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