MyBatis传递多个参数方式

-- 创建“用户信息”数据表
CREATE TABLE IF NOT EXISTS tb_user
( 
	id INT AUTO_INCREMENT PRIMARY KEY COMMENT '用户编号',
	user_account VARCHAR(50) NOT NULL COMMENT '用户账号',
	user_password VARCHAR(50) NOT NULL COMMENT '用户密码',
	blog_url VARCHAR(50) NOT NULL COMMENT '博客地址',
	remark VARCHAR(50) COMMENT '备注'
) COMMENT = '用户信息表';
 
-- 添加数据
INSERT INTO tb_user(user_account,user_password,blog_url,remark) VALUES('pan_junbiao的博客','123456','https://blog.csdn.net/pan_junbiao','您好，欢迎访问 pan_junbiao的博客');

package com.pjb.mybatis.po;
 
/**
 * 用户信息的持久化类
 * @author pan_junbiao
 **/
public class User
{
    private int id; //用户编号
    private String userAccount; //用户账号
    private String userPassword; //用户密码
    private String blogUrl; //博客地址
    private String remark; //备注
 
    //省略getter与setter方法...
}

<!-- 开启自动驼峰命名规则（camel case）映射 -->
<setting name="mapUnderscoreToCamelCase" value="true"/>

<?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.pjb.mybatis.mapper.UserMapper">
 
    <!-- 根据用户账号和用户密码，获取用户信息 -->
    <select id="getUser" resultType="com.pjb.mybatis.po.User">
        SELECT * FROM tb_user
        WHERE user_account = #{arg0}
        AND user_password = #{arg1}
    </select>
 
</mapper>

package com.pjb.mybatis.mapper;
 
import com.pjb.mybatis.po.User;
 
/**
 * 用户信息Mapper动态代理接口
 * @author pan_junbiao
 **/
public interface UserMapper
{
    public User getUser(String account,String password);
}

/**
 * MyBatis传递多个参数
 * @author pan_junbiao
 */
@Test
public void getUser()
{
    DataConnection dataConnection = new DataConnection();
    SqlSession sqlSession = dataConnection.getSqlSession();
    //获取Mapper代理
    UserMapper userMapper = sqlSession.getMapper(UserMapper.class);
    //执行Mapper代理对象的查询方法
    User user = userMapper.getUser("pan_junbiao的博客","123456");
    if(user!=null)
    {
        System.out.println("用户编号：" + user.getId());
        System.out.println("用户账号：" + user.getUserAccount());
        System.out.println("用户密码：" + user.getUserPassword());
        System.out.println("博客地址：" + user.getBlogUrl());
        System.out.println("备注信息：" + user.getRemark());
 
    }
    sqlSession.close();
}

public User getUser(@Param("userAccount") String account,@Param("userPassword") String password);

<select id="getUser" resultType="com.pjb.mybatis.po.User">
    SELECT * FROM tb_user
    WHERE user_account = #{userAccount}
    AND user_password = #{userPassword}
</select>

public User getUser(Map<String, Object> params);

<select id="getUser" parameterType="java.util.Map" resultType="com.pjb.mybatis.po.User">
    SELECT * FROM tb_user
    WHERE user_account = #{userAccount}
    AND user_password = #{userPassword}
</select>

//获取Mapper代理
UserMapper userMapper = sqlSession.getMapper(UserMapper.class);
//查询参数
Map params = new HashMap();
params.put("userAccount","pan_junbiao的博客");
params.put("userPassword","123456");
//执行Mapper代理对象的查询方法
User user = userMapper.getUser(params);

package com.pjb.mybatis.po;
 
/**
 * 用户信息参数类
 * @author pan_junbiao
 **/
public class UserParam
{
    private String userAccount; //用户账号
    private String userPassword; //用户密码
 
    //省略getter与setter方法...
}

public User getUser(UserParam userParam);

<select id="getUser" parameterType="com.pjb.mybatis.po.UserParam" resultType="com.pjb.mybatis.po.User">
    SELECT * FROM tb_user
    WHERE user_account = #{userAccount}
    AND user_password = #{userPassword}
</select>

//获取Mapper代理
UserMapper userMapper = sqlSession.getMapper(UserMapper.class);
//查询参数
UserParam userParam = new UserParam();
userParam.setUserAccount("pan_junbiao的博客");
userParam.setUserPassword("123456");
//执行Mapper代理对象的查询方法
User user = userMapper.getUser(userParam);