CREATE TABLE `t_user_test` (
  `id` int(20) NOT NULL AUTO_INCREMENT,
  `user_name` varchar(60) DEFAULT NULL COMMENT '用戶名稱',
  `real_name` varchar(60) DEFAULT NULL COMMENT '真實(shí)名稱',
  `sex` tinyint(3) DEFAULT NULL COMMENT '姓名',
  `mobile` varchar(20) DEFAULT NULL COMMENT '電話',
  `email` varchar(60) DEFAULT NULL COMMENT '郵箱',
  `note` varchar(200) DEFAULT NULL COMMENT '備注',
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=142 DEFAULT CHARSET=utf8;碼

package com.enjoylearning.mybatis.entity;

import java.io.Serializable;
import java.util.List;

import org.apache.ibatis.annotations.Param;

import com.mysql.jdbc.Blob;

public class TUser implements Serializable{
	
    private Integer id;

    private String userName;

    private String realName;

    private Byte sex;

    private String mobile;

    private String email;

    private String note;

    private TPosition position;
    
    private List<TJobHistory> jobs ;
    
    private List<HealthReport> healthReports;

    
    private List<TRole> roles;


  
	@Override
	public String toString() {
		String positionId=  (position == null ? "" : String.valueOf(position.getId()));
		return "TUser [id=" + id + ", userName=" + userName + ", realName="
				+ realName + ", sex=" + sex + ", mobile=" + mobile + ", email="
				+ email + ", note=" + note + ", positionId=" + positionId + "]";
	}


	public Integer getId() {
		return id;
	}
	public void setId(Integer id) {
		this.id = id;
	}
	public String getUserName() {
		return userName;
	}
	public void setUserName(String userName) {
		this.userName = userName;
	}
	public String getRealName() {
		return realName;
	}
	public void setRealName(String realName) {
		this.realName = realName;
	}
	
	public Byte getSex() {
		return sex;
	}

	public void setSex(Byte sex) {
		this.sex = sex;
	}


	public String getMobile() {
		return mobile;
	}


	public void setMobile(String mobile) {
		this.mobile = mobile;
	}


	public String getEmail() {
		return email;
	}


	public void setEmail(String email) {
		this.email = email;
	}


	public String getNote() {
		return note;
	}

	public void setNote(String note) {
		this.note = note;
	}


	public TPosition getPosition() {
		return position;
	}


	public void setPosition(TPosition position) {
		this.position = position;
	}

	public List<TJobHistory> getJobs() {
		return jobs;
	}


	public void setJobs(List<TJobHistory> jobs) {
		this.jobs = jobs;
	}

	public List<HealthReport> getHealthReports() {
		return healthReports;
	}

	public void setHealthReports(List<HealthReport> healthReports) {
		this.healthReports = healthReports;
	}

	public List<TRole> getRoles() {
		return roles;
	}

	public void setRoles(List<TRole> roles) {
		this.roles = roles;
	}

}

public interface TUserTestMapper {
	
	TUser selectByPrimaryKey(Integer id);
	List<TUser> selectAll();

}

<?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.mybatis.mapper.TUserTestMapper">


	<select id="selectByPrimaryKey" resultType="TUser">
		select
		id, user_name, real_name, sex, mobile, email, note
		from t_user_test
		where id = #{id,jdbcType=INTEGER}
	</select>
	
	
	<select id="selectAll" resultType="TUser">
		select
		id, user_name, real_name, sex, mobile, email, note
		from t_user_test
	</select>


</mapper>

<?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"/>
	
 	<settings>
		<!-- 設(shè)置自動駝峰轉(zhuǎn)換		 -->
		<setting name="mapUnderscoreToCamelCase" value="true" />

		<!-- 開啟懶加載 -->		
		 <!-- 當(dāng)啟用時，有延遲加載屬性的對象在被調(diào)用時將會完全加載任意屬性。否則，每種屬性將會按需要加載。默認(rèn)：true -->
	  <setting name="aggressiveLazyLoading" value="false" />

	</settings>
	<!-- 別名定義 -->
	<typeAliases>
		<package name="com.enjoylearning.mybatis.entity" />
	</typeAliases>
	
 	<plugins>
		<plugin interceptor="com.enjoylearning.mybatis.Interceptors.ThresholdInterceptor"> 
			<property name="threshold" value="10"/>
		</plugin>
			
  		 <plugin interceptor="com.github.pagehelper.PageInterceptor">
			<property name="pageSizeZero" value="true" />
		</plugin>
	</plugins>


	<!--配置environment環(huán)境 -->
	<environments default="development">
		<!-- 環(huán)境配置1，每個SqlSessionFactory對應(yīng)一個環(huán)境 -->
		<environment id="development">
			<transactionManager type="JDBC" />
			<dataSource type="POOLED">
				<property name="driver" value="com.mysql.jdbc.Driver" />
				<property name="url" value="jdbc:mysql://ip：port/test?useUnicode=true" />
				<property name="username" value="root" />
				<property name="password" value="123456" />
			</dataSource>
		</environment>
	</environments>

	<!-- 映射文件，mapper的配置文件 -->
	<mappers>
		<!--直接映射到相應(yīng)的mapper文件 -->
		<mapper resource="sqlmapper/TUserTestMapper.xml" />
	</mappers>

</configuration>  

public class MybatisDemo2 {
	
	private SqlSessionFactory sqlSessionFactory;
	
	@Before
	public void init() throws IOException {
		//--------------------第一階段---------------------------
	    // 1.讀取mybatis配置文件創(chuàng)SqlSessionFactory
		String resource = "mybatis-config.xml";
		InputStream inputStream = Resources.getResourceAsStream(resource);
		// 1.讀取mybatis配置文件創(chuàng)SqlSessionFactory
		sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);
		inputStream.close();
	}

	@Test
	//知識點(diǎn)：resultType
	public void testAutoMapping() throws IOException {
		// 2.獲取sqlSession	
		SqlSession sqlSession = sqlSessionFactory.openSession();
		// 3.獲取對應(yīng)mapper
		TUserTestMapper mapper = sqlSession.getMapper(TUserTestMapper.class);
		// 4.執(zhí)行查詢語句并返回多條數(shù)據(jù)
		
		List<TUser> users = mapper.selectAll();
		for (TUser tUser : users) {
			System.out.println(tUser);
		}
		
	}
	
}

sql語句：“com.mysql.jdbc.JDBC4PreparedStatement@654f0d9c: select
		id, user_name, real_name, sex, mobile, email, note
		from t_user_test”執(zhí)行時間為：35毫秒，已經(jīng)超過閾值！
TUser [id=1, userName=zhangsan, realName=張三, sex=1, mobile=186995587411, email=zhangsan@qq.com, note=zhangsan的備注, positionId=]
TUser [id=2, userName=lisi, realName=李四, sex=1, mobile=18677885200, email=lisi@qq.com, note=lisi的備注, positionId=]
TUser [id=3, userName=wangwu, realName=王五, sex=2, mobile=18695988747, email=xxoo@163.com, note=wangwu's note, positionId=]

public interface TUserMapper {
	List<TUser> selectTestResultMap();
}

<?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.mybatis.mapper.TUserMapper">

	<resultMap id="UserResultMap" type="TUser" autoMapping="true">
		<id column="id" property="id" />
        <result column="userName" property="userName"/>
		<result column="realName" property="realName" />
		<result column="sex" property="sex" />
		<result column="mobile" property="mobile" />
		<result column="email" property="email" />
		<result column="note" property="note" />
		<association property="position" javaType="TPosition" columnPrefix="post_">
			<id column="id" property="id"/>
			<result column="name" property="postName"/>
			<result column="note" property="note"/>
		</association>
	</resultMap>

	<select  id="selectTestResultMap" resultMap="UserResultMap" >
		select
		    a.id,
		    userName,
			realName,
			sex,
			mobile,
			email,
			a.note,
			b.id  post_id,
			b.post_name,
			b.note post_note
		from t_user a,
			t_position b
		where a.position_id = b.id

	</select>

</mapper>

public class MybatisDemo2 {
	

	private SqlSessionFactory sqlSessionFactory;
	
	@Before
	public void init() throws IOException {
		//--------------------第一階段---------------------------
	    // 1.讀取mybatis配置文件創(chuàng)SqlSessionFactory
		String resource = "mybatis-config.xml";
		InputStream inputStream = Resources.getResourceAsStream(resource);
		// 1.讀取mybatis配置文件創(chuàng)SqlSessionFactory
		sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);
		inputStream.close();
	}


	
	@Test
	public void testResultMap() throws IOException {
		//--------------------第二階段---------------------------
		// 2.獲取sqlSession	
		SqlSession sqlSession = sqlSessionFactory.openSession();
		// 3.獲取對應(yīng)mapper
		TUserMapper mapper = sqlSession.getMapper(TUserMapper.class);
		
		//--------------------第三階段---------------------------

		// 4.執(zhí)行查詢語句并返回單條數(shù)據(jù)
		List<TUser> users = mapper.selectTestResultMap();
		for (TUser tUser : users) {
			System.out.println(tUser.getUserName());
			System.out.println(tUser.getPosition().getPostName());
		}
	}
}