"一、建立表 1.1、建立表，并插入数据 /* SQLyog Enterprise v12.09 (64 bit) MySQL - 5.6.27-log : Database - mybatis ***************************************************** ...."

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MyBatis入门（三）---多个参数

一、建立表

1.1、建立表，并插入数据

/*
SQLyog Enterprise v12.09 (64 bit)
MySQL - 5.6.27-log : Database - mybatis
*********************************************************************
*/
/!40101 SET NAMES utf8 /;
/!40101 SET SQL_MODE=''/;
/!40014 SET @OLD_UNIQUE_CHECKS=@@UNIQUE_CHECKS, UNIQUE_CHECKS=0 /;
/!40014 SET @OLD_FOREIGN_KEY_CHECKS=@@FOREIGN_KEY_CHECKS, FOREIGN_KEY_CHECKS=0 /;
/!40101 SET @OLD_SQL_MODE=@@SQL_MODE, SQL_MODE='NO_AUTO_VALUE_ON_ZERO' /;
/!40111 SET @OLD_SQL_NOTES=@@SQL_NOTES, SQL_NOTES=0 /;
CREATE DATABASE /!32312 IF NOT EXISTS/mybatis /!40100 DEFAULT CHARACTER SET utf8 /;
USE mybatis;
/Table structure for table author /
DROP TABLE IF EXISTS author;
CREATE TABLE author (
author_id int(11) unsigned NOT NULL AUTO_INCREMENT COMMENT '作者 ID 主键',
author_username varchar(30) NOT NULL COMMENT '作者用户名',
author_password varchar(32) NOT NULL COMMENT '作者密码',
author_email varchar(50) NOT NULL COMMENT '作者邮箱',
author_bio varchar(1000) DEFAULT '这家伙很赖，什么也没留下' COMMENT '作者简介',
register_time datetime DEFAULT CURRENT_TIMESTAMP COMMENT '注册时间',
PRIMARY KEY (author_id)
) ENGINE=InnoDB AUTO_INCREMENT=10 DEFAULT CHARSET=utf8;
/Data for the table author /
insert  into author(author_id,author_username,author_password,author_email,author_bio,register_time)
values (1,'张三','123456','123@qq.com','张三是个新手，刚开始注册','2015-10-29 10:23:59'),(2,'李四','123asf','lisi@163.com','魂牵梦萦 ','2015-10-29 10:24:29'),(3,'王五','dfsd342','ww@sina.com','康熙王朝','2015-10-29 10:25:23'),(4,'赵六','123098sdfa','zhaoliu@qq.com','花午骨','2015-10-29 10:26:09'),(5,'钱七','zxasqw','qianqi@qq.com','这家伙很赖，什么也没留下','2015-10-29 10:27:04'),(6,'张三丰','123456','zhangsf@qq.com','这家伙很赖，什么也没留下','2015-10-29 11:48:00'),(7,'金庸','qwertyuiop','wuji@163.com','这家伙很赖，什么也没留下','2015-10-29 11:48:24'),(8,'知道了','456789','456789@qq.com','哈哈哈哈哈雅虎','2015-10-29 14:03:27'),(9,'不知道','1234567890','123456@qq.com','哈哈哈哈哈雅虎','2015-10-29 14:01:16');
/!40101 SET SQL_MODE=@OLD_SQL_MODE /;
/!40014 SET FOREIGN_KEY_CHECKS=@OLD_FOREIGN_KEY_CHECKS /;
/!40014 SET UNIQUE_CHECKS=@OLD_UNIQUE_CHECKS /;
/!40111 SET SQL_NOTES=@OLD_SQL_NOTES /;

二、创建项目

2.1、创建项目

2.2、创建 POJO 类

package com.pb.mybatis.po;
import java.util.Date;
/**
*


@Title: Author.java


@Package com.pb.mybatis.po


@ClassName Author


@Description: TODO(Blog 作者类)


@author 刘楠


@date 2015-10-29 上午 9:27:53


@version V1.0
*/
public class Author {
//作者 ID
private int authorId;
//作者用户名
private String authorUserName;
//作者密码
private String authorPassword;
//作者邮箱
private String authorEmail;
//作者介绍
private int authorBio;
//注册时间
private Date registerTime;
/**

@return the authorId
*/
public int getAuthorId() {
return authorId;
}

/**

@param authorId the authorId to set
*/
public void setAuthorId(int authorId) {
this.authorId = authorId;
}

/**

@return the authorUserName
*/
public String getAuthorUserName() {
return authorUserName;
}

/**

@param authorUserName the authorUserName to set
*/
public void setAuthorUserName(String authorUserName) {
this.authorUserName = authorUserName;
}

/**

@return the authorPassword
*/
public String getAuthorPassword() {
return authorPassword;
}

/**

@param authorPassword the authorPassword to set
*/
public void setAuthorPassword(String authorPassword) {
this.authorPassword = authorPassword;
}

/**

@return the authorEmail
*/
public String getAuthorEmail() {
return authorEmail;
}

/**

@param authorEmail the authorEmail to set
*/
public void setAuthorEmail(String authorEmail) {
this.authorEmail = authorEmail;
}

/**

@return the authorBio
*/
public int getAuthorBio() {
return authorBio;
}

/**

@param authorBio the authorBio to set
*/
public void setAuthorBio(int authorBio) {
this.authorBio = authorBio;
}

/**

@return the registerTime
*/
public Date getRegisterTime() {
return registerTime;
}

/**

@param registerTime the registerTime to set
*/
public void setRegisterTime(Date registerTime) {
this.registerTime = registerTime;
}

/** (non Javadoc)


<p>Title: toString</p>


<p>Description: 重写 toString 方法 </p>


@return


@see java.lang.Object#toString()
*/
@Override
public String toString() {
return "Author [authorId=" + authorId + ", authorUserName="
+ authorUserName + ", authorPassword=" + authorPassword
+ ", authorEmail=" + authorEmail + ", authorBio=" + authorBio
+ ", registerTime=" + registerTime + "]";
}




}

2.3、创建 configruation

<?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>
<properties resource="db.properties" />
<typeAliases>
<!-- 使用默认别名  -->
<package name="com.pb.mybatis.po"/>
</typeAliases>
<environments default="development">
<environment id="development">
<transactionManager type="JDBC"/>
<dataSource type="POOLED">
<property name="driver" value="${jdbc.driver}"/>
<property name="url" value="${jdbc.url}"/>
<property name="username" value="${jdbc.username}"/>
<property name="password" value="${jdbc.password}"/>
</dataSource>
</environment>
</environments>
<mappers>
<!-- 加载映射 -->
<package name="com.pb.mybatis.mapper"/>
</mappers>
</configuration>

2.3、创建 mapper 接口

public interface AuthorMapper {
</span><span style="color: rgba(0, 128, 0, 1)">/**</span><span style="color: rgba(0, 128, 0, 1)">
 * 
 * @Title: findById

 * @Description: TODO(根据查找一个用户)

 * </span><span style="color: rgba(128, 128, 128, 1)">@param</span><span style="color: rgba(0, 128, 0, 1)"> id
 * </span><span style="color: rgba(128, 128, 128, 1)">@return</span><span style="color: rgba(0, 128, 0, 1)"> Author
 </span><span style="color: rgba(0, 128, 0, 1)">*/</span>
<span style="color: rgba(0, 0, 255, 1)">public</span> Author findAuthorById(<span style="color: rgba(0, 0, 255, 1)">int</span><span style="color: rgba(0, 0, 0, 1)"> authorId);

}

2.4、创建 mapper.xml

<?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="com.pb.mybatis.mapper.AuthorMapper">
<!--使用 resultMap 映射  type 使用别名，-->
<resultMap type="Author" id="authorResultMap">
<!--主键  -->
<id property="authorId" column="author_id"/>
<!--普通属性与表中的字段对应  -->
<result property="authorUserName" column="author_username"/>
<result property="authorPassword" column="author_password"/>
<result property="authorEmail" column="author_email"/>
<result property="authorBio" column="author_bio"/>
<result property="registerTime" column="register_time"/>
</resultMap>
<!--根据查找一个用户  -->
<select id="findAuthorById" parameterType="int" resultMap="authorResultMap">
SELECT * FROM author
WHERE author_id=#{authorId}
</select>
</mapper>

三、传入多个 ID，进行查找使用 List

3.1、更改 Mapper 接口

/**
     * 
     * @Title: findAuthors
 * @Description: TODO(根据多个ID进行查找)

 * </span><span style="color: rgba(128, 128, 128, 1)">@param</span><span style="color: rgba(0, 128, 0, 1)"> idLists
 * </span><span style="color: rgba(128, 128, 128, 1)">@return</span><span style="color: rgba(0, 128, 0, 1)"> List&lt;Author&gt;
 </span><span style="color: rgba(0, 128, 0, 1)">*/</span>
<span style="color: rgba(0, 0, 255, 1)">public</span> List&lt;Author&gt; findAuthors(List&lt;Integer&gt; idLists);</pre>

3.2、更改 Mapper.xml

<!--根据多个 ID 查找  -->
<select id="findAuthors"  resultMap="authorResultMap">
SELECT * FROM author
WHERE author_id in
<foreach collection="list" item="item" index="index" open="(" close=")" separator=",">
#{item}
</foreach>
    <span style="color: rgba(0, 128, 0, 1)">&lt;!--</span><span style="color: rgba(0, 128, 0, 1)"> collection:传入参数的名称 index:索引： item:collection的别名 </span><span style="color: rgba(0, 128, 0, 1)">--&gt;</span>

</select>

3.3、测试

@Test
    public void testFindAuthors() {
        //获取会话
        SqlSession sqlSession=sqlSessionFactory.openSession();
        //Mapper 接口
        AuthorMapper authorMapper=sqlSession.getMapper(AuthorMapper.class);
        List<Integer> list=new ArrayList<Integer>();
    list.add(</span>1<span style="color: rgba(0, 0, 0, 1)">);
    list.add(</span>3<span style="color: rgba(0, 0, 0, 1)">);
    list.add(</span>4<span style="color: rgba(0, 0, 0, 1)">);
    list.add(</span>6<span style="color: rgba(0, 0, 0, 1)">);
    list.add(</span>7<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)">调用方法</span>
    List&lt;Author&gt; authors=<span style="color: rgba(0, 0, 0, 1)">authorMapper.findAuthors(list);
    System.out.println(authors);
    </span><span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)">关闭会话</span>

        sqlSession.close();
}

四、使用 Map 做为参数

4.1、在 Mapper 接口中增加相应方法

/**
     * 
     * @Title: findAuthorsByMap
 * @Description: TODO(使用Map做为参数)

 * </span><span style="color: rgba(128, 128, 128, 1)">@param</span><span style="color: rgba(0, 128, 0, 1)"> map
 * </span><span style="color: rgba(128, 128, 128, 1)">@return</span><span style="color: rgba(0, 128, 0, 1)"> List&lt;Author&gt;
 </span><span style="color: rgba(0, 128, 0, 1)">*/</span>
<span style="color: rgba(0, 0, 255, 1)">public</span> List&lt;Author&gt; findAuthorsByMap(Map&lt;String, Object&gt; map);</pre>

4.2、更改 Mapper.xml

<!--使用 Map 查找  -->
<select id="findAuthorsByMap" resultMap="authorResultMap">
SELECT * FROM author
<!--  参数使用 Map 的 Key-->
WHERE author_username LIKE "%"#{username}"%"
or author_bio like"%"#{bio}"%"
</select>

4.3、测试

@Test
    public void testFindAuthorsByMap() {
        //获取会话
                SqlSession sqlSession=sqlSessionFactory.openSession();
                //Mapper 接口
                AuthorMapper authorMapper=sqlSession.getMapper(AuthorMapper.class);
                Map<String, Object> map=new HashMap<String, Object>();
                map.put("username", "张");
                map.put("bio", "哈");
            </span><span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)">调用方法</span>
            List&lt;Author&gt; authors=<span style="color: rgba(0, 0, 0, 1)">authorMapper.findAuthorsByMap(map);
            System.out.println(authors);
            </span><span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)">关闭会话</span>

                sqlSession.close();
for(Author a:authors){
System.out.println(a.toString());
}
}

五、直接使用多个参数

5.1、Mapper 接口

/**
     * 
     * @Title: findAuthorsByParams
 * @Description: TODO(使用多个参数

 * </span><span style="color: rgba(128, 128, 128, 1)">@param</span><span style="color: rgba(0, 128, 0, 1)"> id
 * </span><span style="color: rgba(128, 128, 128, 1)">@param</span><span style="color: rgba(0, 128, 0, 1)"> username
 * </span><span style="color: rgba(128, 128, 128, 1)">@return</span><span style="color: rgba(0, 128, 0, 1)"> List&lt;Author&gt;
 </span><span style="color: rgba(0, 128, 0, 1)">*/</span>
<span style="color: rgba(0, 0, 255, 1)">public</span> List&lt;Author&gt; findAuthorsByParams(<span style="color: rgba(0, 0, 255, 1)">int</span> authorId,String authorUserName);</pre>

5.2、Mapper.xml

<!--直接使用多个参数  -->
<select id="findAuthorsByParams" resultMap="authorResultMap">
SELECT * FROM author
WHERE author_id=#{0}
OR author_username LIKE "%"#{1}"%"
<!-- 其中，#{0} 代表接收的是 dao 层中的第一个参数，#{1} 代表 dao 层中第二参数，更多参数一致往后加即可。 -->
</select>

5.3、测试

@Test
    public void testFindAuthorsByParams() {
        //获取会话
                SqlSession sqlSession=sqlSessionFactory.openSession();
                //Mapper 接口
                AuthorMapper authorMapper=sqlSession.getMapper(AuthorMapper.class);
            </span><span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)">调用方法</span>
            List&lt;Author&gt; authors=authorMapper.findAuthorsByParams(6,"张"<span style="color: rgba(0, 0, 0, 1)">);
            System.out.println(authors);
            </span><span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)">关闭会话</span>

                sqlSession.close();
for(Author a:authors){
System.out.println(a.toString());
}
}

六、直接使用多个参数注解写法

6.1、Mapper 接口

public List<Author> findAuthorsByParams(@Param("id") int authorId,@Param("username")String authorUserName);

6.2、Mapper.xml

<!--使用注解的方式使用多个参数  -->
<select id="findAuthorsByParams" resultMap="authorResultMap">
SELECT * FROM author
WHERE author_id=#{id}
or author_username LIKE "%"#{username}"%"
<!-- 使用注解的方式。，直接使用 Param 中的参数即可 -->
</select>

MyBatis入门（三）---多个参数

一、建立表

二、创建项目

四、使用 Map 做为参数

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MyBatis入门（三）---多个参数