java：Mybatis框架2（基於mapper接口的開發，多種查詢，復合類型查詢，resultMap定義，多表聯查，sql片段）

1.mybatis02：

 

　　

　

　　mybatis-config.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>
    <!-- 加載屬性文件 -->
       <properties resource="db.properties"/>
    <environments default="development">
         <environment id="development">
             <!-- 使用jdbc中的事務 -->
            <transactionManager type="JDBC"></transactionManager>         
            <!-- 配置數據源 -->
            <dataSource type="POOLED">
                 <property name="driver" value="${driver}"/>
                 <property name="url" value="${url}"/>
                 <property name="username" value="${username}"/>
                 <property name="password" value="${password}"/>
            </dataSource>
         </environment>
    </environments>
    <!-- 引入映射文件 -->
    <mappers>
<!--         <mapper resource="cn/zzsxt/mapper/TbUserMapper.xml"/> -->
<!-- 注意：此種方法要求mapper接口和mapper映射文件要名稱相同，且放到同一個目錄下； -->
<!--         <mapper class="cn.zzsxt.mapper.TbUserMapper"/> -->
<!-- 注意：此種方法要求mapper接口和mapper映射文件要名稱相同，且放到同一個目錄下； -->
             <package name="cn.zzsxt.mapper"/>
    </mappers>
</configuration>  

 

　　log4j.properties：

#Console
log4j.appender.Console=org.apache.log4j.ConsoleAppender
log4j.appender.Console.layout=org.apache.log4j.PatternLayout
log4j.appender.Console.layout.ConversionPattern=%d [%t] %-5p [%c] - %m%n
log4j.logger.org.apache.ibatis=DEBUG
#log4j.rootLogger=warn,appender1  
#log4j.appender.appender1=org.apache.log4j.ConsoleAppender  
#log4j.appender.appender1.layout=org.apache.log4j.SimpleLayout  

　　db.properties：

driver=com.mysql.jdbc.Driver
url=jdbc:mysql://localhost:3306/test
username=root
password=root

　　TbUser.java：

package cn.zzsxt.entity;

import java.io.Serializable;
import java.util.Date;

public class TbUser implements Serializable{
    private long id;
    private String username;
    private String sex;
    private Date birthday;
    private String address;
    
    public long getId() {
        return id;
    }
    public void setId(long id) {
        this.id = id;
    }
    public String getUsername() {
        return username;
    }
    public void setUsername(String username) {
        this.username = username;
    }
    public String getSex() {
        return sex;
    }
    public void setSex(String sex) {
        this.sex = sex;
    }
    public Date getBirthday() {
        return birthday;
    }
    public void setBirthday(Date birthday) {
        this.birthday = birthday;
    }
    public String getAddress() {
        return address;
    }
    public void setAddress(String address) {
        this.address = address;
    }
    @Override
    public String toString() {
        return "TbUser [id=" + id + ", username=" + username + ", sex=" + sex + ", birthday=" + birthday + ", address="
                + address + "]";
    }
    
}

　　TbUserMapper.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">
<!-- 
1、 mapper接口的全限定名要和mapper映射文件的namespace值一致。
2、 mapper接口的方法名稱要和mapper映射文件的statement的id一致。
3、 mapper接口的方法參數類型要和mapper映射文件的statement的parameterType的值一致，而且它的參數是一個。
4、 mapper接口的方法返回值類型要和mapper映射文件的statement的resultType的值一致。
 -->        
<mapper namespace="cn.zzsxt.mapper.TbUserMapper">
 <!--
        1.需求根據用戶名稱模糊查詢
        2.思路：模糊查詢返回結果可能是多條紀錄
        3.resultType:指定就是單條記錄所映射成java對象類型
        4.${}:表示拼接sql串，將接收到參數的內容不加任何修飾拼接在sql中
        5.使用${}容易引起sql注入
        6.${value}:接受輸入參數的內容，如果傳入類型是簡單類型，${}中只能用value
    -->
    <select id="findUserByName" parameterType="java.lang.String" resultType="cn.zzsxt.entity.TbUser">
        select * from tb_user where username like '%${value}%'
    </select>
    <select id="findUserById" parameterType="java.lang.Long" resultType="cn.zzsxt.entity.TbUser">
        select * from tb_user where id=#{id}
    </select>
    <insert id="addUser" parameterType="cn.zzsxt.entity.TbUser">
        insert into tb_user(username,sex,birthday,address) values(#{username},#{sex},#{birthday},#{address})
    </insert>
</mapper>

　　TbUserMapper.java：

package cn.zzsxt.mapper;

import java.util.List;
import java.util.Map;

import cn.zzsxt.entity.TbUser;
import cn.zzsxt.vo.TbUserQuery;

public interface TbUserMapper {
    List<TbUser> findUserByName(String username);
    TbUser findUserById(long id);
    int addUser(TbUser user);
    /**
     * 查詢用戶信息，要求對用戶名進行模糊查找，對性別進行精確查找
     * @return
     */
    List<TbUser> findUserByNameAndSexVo(TbUserQuery userQuery);
    /**
     * 查詢用戶信息，要求對用戶名進行模糊查找，對性別進行精確查找
     * @param map
     * @return
     */
    List<TbUser> findUserByNameAndSexMap(Map<String,Object> map);
    /**
     * 查詢用戶信息，要求對用戶名進行模糊查找，對性別進行精確查找
     * @param user
     * @return
     */
    List<TbUser> findUserByAddressAndSex(TbUser user);
    
    /**
     * 查詢用戶表中總記錄數
     * @return
     */
    int getCount();
    /**
     * 使用resultMap封裝結果,根據用戶編號查詢用戶信息，
     * @param id
     * @return
     */
    TbUser findUserByResultMap(long id);
    /**
     * 查詢部分列
     * @param id
     * @return
     */
    TbUser findUserByResultType(long id);
    
    List<TbUser> findUserList(TbUserQuery userQuery);
}

　　TbUserMapper.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">
<!-- 
1、 mapper接口的全限定名要和mapper映射文件的namespace值一致。
2、 mapper接口的方法名稱要和mapper映射文件的statement的id一致。
3、 mapper接口的方法參數類型要和mapper映射文件的statement的parameterType的值一致，而且它的參數是一個。
4、 mapper接口的方法返回值類型要和mapper映射文件的statement的resultType的值一致。
 -->        
<mapper namespace="cn.zzsxt.mapper.TbUserMapper">
 <!--
        1.需求根據用戶名稱模糊查詢
        2.思路：模糊查詢返回結果可能是多條紀錄
        3.resultType:指定就是單條記錄所映射成java對象類型
        4.${}:表示拼接sql串，將接收到參數的內容不加任何修飾拼接在sql中
        5.使用${}容易引起sql注入
        6.${value}:接受輸入參數的內容，如果傳入類型是簡單類型，${}中只能用value
    -->
    <select id="findUserByName" parameterType="java.lang.String" resultType="cn.zzsxt.entity.TbUser">
        select * from tb_user where username like '%${value}%'
    </select>
    <select id="findUserById" parameterType="java.lang.Long" resultType="cn.zzsxt.entity.TbUser">
        select * from tb_user where id=#{id}
    </select>
    <insert id="addUser" parameterType="cn.zzsxt.entity.TbUser">
        insert into tb_user(username,sex,birthday,address) values(#{username},#{sex},#{birthday},#{address})
    </insert>
    <!-- 根據用戶名和性別查詢 -->
    <select id="findUserByNameAndSexVo" parameterType="cn.zzsxt.vo.TbUserQuery" resultType="cn.zzsxt.entity.TbUser">
        select * from tb_user where username like '%${user.username}%' and sex=#{user.sex}
    </select>
    
        <!-- 根據用戶名和性別查詢,參數為map -->
    <select id="findUserByNameAndSexMap" parameterType="java.util.HashMap" resultType="cn.zzsxt.entity.TbUser">
        select * from tb_user where username like '%${uname}%' and sex=#{sex}
    </select>
    <!-- 根據用戶名和性別查詢 -->
    <select id="findUserByAddressAndSex" parameterType="cn.zzsxt.entity.TbUser" resultType="cn.zzsxt.entity.TbUser">
        select * from tb_user where address like '%${address}%' and sex=#{sex}
    </select>
    <!-- 查詢總記錄數 -->
    <select id="getCount" resultType="java.lang.Integer">
        select count(*) from tb_user
    </select>


    <!-- 
      定義resultMap：解決字段名稱與屬性名稱不一致的問題。
        將SELECT id id_,username username_,
        sex sex_ FROM tb_user WHERE id = 1 和 User類中的屬性作一個映射關系
        type:resultMap最終映射的java對象類型，可以使用別名
        id：對resultMap的唯一標識
     -->
     
     <resultMap id="userResultMap" type="cn.zzsxt.entity.TbUser">
         <id column="id_" property="id"/>
         <result column="username_" property="username"/>
         <result column="sex_" property="sex"/>
         <result column="birthday" property="birthday"/>
         <result column="address" property="address"/>
     </resultMap>
     <select id="findUserByResultMap" parameterType="java.lang.Long" resultMap="userResultMap">
         select id id_,username username_,sex sex_,birthday,address from tb_user where id=#{id}
     </select>
    
    
     <!-- 查詢部分列 -->
     <select id="findUserByResultType" parameterType="java.lang.Long" resultType="cn.zzsxt.entity.TbUser">
         select id,username,sex from tb_user where id=#{id}
     </select>
     
     
     <!-- 動態SQL -->
         <select id="findUserList" parameterType="cn.zzsxt.vo.TbUserQuery" resultType="cn.zzsxt.entity.TbUser">
            select * from tb_user
           <where>
<!--                    <if test="user.address!=null and user.address!=''"> -->
<!--                        and address like'%${user.address}%' -->
<!--                    </if> -->
<!--                    <if test="user.sex!=null and user.sex!=''"> -->
<!--                        and sex=#{user.sex} -->
<!--                    </if> -->
                 <!-- 引入SQL片段 -->
                 <include refid="where_address_sex"></include>
           </where>
    </select>
    
    
    <!-- SQL片段:提高sql語句的復用性 -->
    <sql id="where_address_sex">
                 <if test="user.address!=null and user.address!=''">
                       and address like'%${user.address}%'
                   </if>
                   <if test="user.sex!=null and user.sex!=''">
                       and sex=#{user.sex}
                   </if>
                   
                   
                   
                   <if test="ids!=null">
                   <!--
                            使用foreach遍歷傳入ids
                            collection:指定輸入對象中集合屬性
                            item:每次遍歷生成對象
                            open：開始遍歷時拼接的串
                            close：結束遍歷時拼接的串
                        separator分隔符:遍歷的兩個對象中需要拼接的串
                        -->
                       <foreach collection="ids" item="user_id" open="and id in (" close=")" separator=",">
                           #{user_id}
                       </foreach>
                   </if>
    </sql>
</mapper>

　　TbUserQuery.java：

package cn.zzsxt.vo;

import java.util.List;

import cn.zzsxt.entity.TbUser;

public class TbUserQuery {
    private TbUser user;
    //用戶編號
    private List<Long> ids;
    
    
    public TbUser getUser() {
        return user;
    }

    public void setUser(TbUser user) {
        this.user = user;
    }

    public List<Long> getIds() {
        return ids;
    }

    public void setIds(List<Long> ids) {
        this.ids = ids;
    }
    
}

　　TestTbUserMapper.java：

package cn.zzsxt.test; 

import java.io.InputStream;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;
import org.junit.Test;

import cn.zzsxt.entity.TbUser;
import cn.zzsxt.mapper.TbUserMapper;
import cn.zzsxt.vo.TbUserQuery;

public class TestTbUserMapper {
    @Test
    public  void testFindUserByName(){
        InputStream ips = this.getClass().getResourceAsStream("/mybatis-config.xml");
        SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(ips);
        SqlSession sqlSession=sqlSessionFactory.openSession();
        //獲取TbUserMapper生成的代理(通過jdk的動態代理實現的)
        TbUserMapper tbUserMapper = sqlSession.getMapper(TbUserMapper.class);
        List<TbUser> list = tbUserMapper.findUserByName("張");
        for (TbUser tbUser : list) {
            System.out.println(tbUser);
        }
        sqlSession.close();
    }
    
    
    @Test
    public  void testFindUserById(){
        InputStream ips = this.getClass().getResourceAsStream("/mybatis-config.xml");
        SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(ips);
        SqlSession sqlSession=sqlSessionFactory.openSession();
        //獲取TbUserMapper生成的代理(通過jdk的動態代理實現的)
        TbUserMapper tbUserMapper = sqlSession.getMapper(TbUserMapper.class);
        TbUser user = tbUserMapper.findUserById(1);
        System.out.println(user);
        sqlSession.close();
    }
    
    @Test
    public  void testAddUser(){
        InputStream ips = this.getClass().getResourceAsStream("/mybatis-config.xml");
        SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(ips);
        SqlSession sqlSession=sqlSessionFactory.openSession();
        //獲取TbUserMapper生成的代理(通過jdk的動態代理實現的)
        TbUserMapper tbUserMapper = sqlSession.getMapper(TbUserMapper.class);
        TbUser user = new TbUser();
        user.setUsername("王五");
        user.setSex("女");
        user.setBirthday(new Date());
        user.setAddress("鄭州");
        int count = tbUserMapper.addUser(user);
        sqlSession.commit();
        System.out.println(count);
        sqlSession.close();
    }
    
    @Test
    public  void testFindUserByNameAndSexVo(){
        InputStream ips = this.getClass().getResourceAsStream("/mybatis-config.xml");
        SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(ips);
        SqlSession sqlSession=sqlSessionFactory.openSession();
        //獲取TbUserMapper生成的代理(通過jdk的動態代理實現的)
        TbUserMapper tbUserMapper = sqlSession.getMapper(TbUserMapper.class);
        TbUserQuery userQuery = new TbUserQuery();
        TbUser user = new TbUser();
        user.setUsername("五");
        user.setSex("男");
        userQuery.setUser(user);
        List<TbUser> list= tbUserMapper.findUserByNameAndSexVo(userQuery);
        for (TbUser tbUser : list) {
            System.out.println(tbUser);
        }
        sqlSession.close();
    }
    @Test
    public  void testFindUserByNameAndSexMap(){
        InputStream ips = this.getClass().getResourceAsStream("/mybatis-config.xml");
        SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(ips);
        SqlSession sqlSession=sqlSessionFactory.openSession();
        //獲取TbUserMapper生成的代理(通過jdk的動態代理實現的)
        TbUserMapper tbUserMapper = sqlSession.getMapper(TbUserMapper.class);
        Map<String,Object> map = new HashMap<String,Object>();
        map.put("uname", "五");
        map.put("sex", "男");
        List<TbUser> list= tbUserMapper.findUserByNameAndSexMap(map);
        for (TbUser tbUser : list) {
            System.out.println(tbUser);
        }
        sqlSession.close();
    }
    @Test
    public  void testFindUserByAddressAndSex(){
        InputStream ips = this.getClass().getResourceAsStream("/mybatis-config.xml");
        SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(ips);
        SqlSession sqlSession=sqlSessionFactory.openSession();
        //獲取TbUserMapper生成的代理(通過jdk的動態代理實現的)
        TbUserMapper tbUserMapper = sqlSession.getMapper(TbUserMapper.class);
        TbUser user = new TbUser();
        user.setAddress("安陽");
        user.setSex("男");
        List<TbUser> list= tbUserMapper.findUserByAddressAndSex(user);
        for (TbUser tbUser : list) {
            System.out.println(tbUser);
        }
        sqlSession.close();
    }
}

　　TestTbUserMapper2.java：

package cn.zzsxt.test; 

import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;

import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;
import org.junit.Test;

import cn.zzsxt.entity.TbUser;
import cn.zzsxt.mapper.TbUserMapper;
import cn.zzsxt.vo.TbUserQuery;

public class TestTbUserMapper2 {
    @Test
    public  void testGetCount(){
        InputStream ips = this.getClass().getResourceAsStream("/mybatis-config.xml");
        SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(ips);
        SqlSession sqlSession=sqlSessionFactory.openSession();
        //獲取TbUserMapper生成的代理(通過jdk的動態代理實現的)
        TbUserMapper tbUserMapper = sqlSession.getMapper(TbUserMapper.class);
        int count = tbUserMapper.getCount();
        System.out.println("總記錄數為:"+count);
        sqlSession.close();
    }
    
    @Test
    public  void testFindUserByResultMap(){
        InputStream ips = this.getClass().getResourceAsStream("/mybatis-config.xml");
        SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(ips);
        SqlSession sqlSession=sqlSessionFactory.openSession();
        //獲取TbUserMapper生成的代理(通過jdk的動態代理實現的)
        TbUserMapper tbUserMapper = sqlSession.getMapper(TbUserMapper.class);
        TbUser user = tbUserMapper.findUserByResultMap(1L);
        System.out.println(user);
        sqlSession.close();
    }
    
    @Test
    public  void testFindUserByResultType(){
        InputStream ips = this.getClass().getResourceAsStream("/mybatis-config.xml");
        SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(ips);
        SqlSession sqlSession=sqlSessionFactory.openSession();
        //獲取TbUserMapper生成的代理(通過jdk的動態代理實現的)
        TbUserMapper tbUserMapper = sqlSession.getMapper(TbUserMapper.class);
        TbUser user = tbUserMapper.findUserByResultType(1L);
        System.out.println(user);
        sqlSession.close();
    }
    /**
     * 動態SQL
     */
    @Test
    public  void testFindUserList(){
        InputStream ips = this.getClass().getResourceAsStream("/mybatis-config.xml");
        SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(ips);
        SqlSession sqlSession=sqlSessionFactory.openSession();
        //獲取TbUserMapper生成的代理(通過jdk的動態代理實現的)
        TbUserMapper tbUserMapper = sqlSession.getMapper(TbUserMapper.class);
        
        TbUserQuery userQuery = new TbUserQuery();
        TbUser user = new TbUser();
        //user.setAddress("安陽");
        //user.setSex("男");
        userQuery.setUser(user);    //此處若不傳值，報錯！！！！！！
        //foreach測試
        List<Long> ids = new ArrayList<Long>();
        ids.add(1L);
        ids.add(2L);
        ids.add(3L);
        userQuery.setIds(ids);
       List<TbUser> list = tbUserMapper.findUserList(userQuery);
        for (TbUser tbUser : list) {
            System.out.println(tbUser);
        }
        sqlSession.close();
    }
    
}

 

2.mybatis03：

 

 

　　mybatis-config.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>
    <!-- 加載屬性文件 -->
       <properties resource="db.properties"/>
    <environments default="development">
         <environment id="development">
             <!-- 使用jdbc中的事務 -->
            <transactionManager type="JDBC"></transactionManager>         
            <!-- 配置數據源 -->
            <dataSource type="POOLED">
                 <property name="driver" value="${driver}"/>
                 <property name="url" value="${url}"/>
                 <property name="username" value="${username}"/>
                 <property name="password" value="${password}"/>
            </dataSource>
         </environment>
    </environments>
    <!-- 引入映射文件 -->
    <mappers>
<!--         <mapper resource="cn/zzsxt/mapper/TbUserMapper.xml"/> -->
<!-- 注意：此種方法要求mapper接口和mapper映射文件要名稱相同，且放到同一個目錄下； -->
<!--         <mapper class="cn.zzsxt.mapper.TbUserMapper"/> -->
<!-- 注意：此種方法要求mapper接口和mapper映射文件要名稱相同，且放到同一個目錄下； -->
             <package name="cn.zzsxt.mapper"/>
    </mappers>
</configuration>  

　　

　　db.properties：

driver=com.mysql.jdbc.Driver
url=jdbc:mysql://localhost:3306/mybatis
username=root
password=root

　　log4j.properties：

#Console
log4j.appender.Console=org.apache.log4j.ConsoleAppender
log4j.appender.Console.layout=org.apache.log4j.PatternLayout
log4j.appender.Console.layout.ConversionPattern=%d [%t] %-5p [%c] - %m%n
log4j.logger.org.apache.ibatis=DEBUG
#log4j.rootLogger=warn,appender1  
#log4j.appender.appender1=org.apache.log4j.ConsoleAppender  
#log4j.appender.appender1.layout=org.apache.log4j.SimpleLayout  

　　TbGoods.java：

package cn.zzsxt.entity;

import java.util.Date;

public class TbGoods {
    private long id;
    private String name;
    private double price;
    private Date create_time;
    private String detail;
    public long getId() {
        return id;
    }
    public void setId(long id) {
        this.id = id;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public double getPrice() {
        return price;
    }
    public void setPrice(double price) {
        this.price = price;
    }
    public Date getCreate_time() {
        return create_time;
    }
    public void setCreate_time(Date create_time) {
        this.create_time = create_time;
    }
    public String getDetail() {
        return detail;
    }
    public void setDetail(String detail) {
        this.detail = detail;
    }
    @Override
    public String toString() {
        return "TbGoods [id=" + id + ", name=" + name + ", price=" + price + ", create_time=" + create_time
                + ", detail=" + detail + "]";
    }
    
}

 

　　TbOrder.java：

package cn.zzsxt.entity;

import java.util.Date;
import java.util.List;

public class TbOrder {
    private long id;
    private long user_id;
    private String order_number;
    private Date create_time;
    private String detail;
    //訂單與訂單明細:一對多
    private List<TbOrderDetail> orderDetailList;
    
    public long getId() {
        return id;
    }
    public void setId(long id) {
        this.id = id;
    }
    public long getUser_id() {
        return user_id;
    }
    public void setUser_id(long user_id) {
        this.user_id = user_id;
    }
    public String getOrder_number() {
        return order_number;
    }
    public void setOrder_number(String order_number) {
        this.order_number = order_number;
    }
    public Date getCreate_time() {
        return create_time;
    }
    public void setCreate_time(Date create_time) {
        this.create_time = create_time;
    }
    public String getDetail() {
        return detail;
    }
    public void setDetail(String detail) {
        this.detail = detail;
    }
    
    public List<TbOrderDetail> getOrderDetailList() {
        return orderDetailList;
    }
    public void setOrderDetailList(List<TbOrderDetail> orderDetailList) {
        this.orderDetailList = orderDetailList;
    }
    @Override
    public String toString() {
        return "TbOrder [id=" + id + ", user_id=" + user_id + ", order_number=" + order_number + ", create_time="
                + create_time + ", detail=" + detail + "]";
    }
    
}

 

　　TbOrderDetail.java：

package cn.zzsxt.entity;

public class TbOrderDetail {
    private long id;
    private long order_id;
    private long goods_id;
    private long goods_num;
    //訂單明細與商品:一對一
    private TbGoods goods;
    
    public long getId() {
        return id;
    }
    public void setId(long id) {
        this.id = id;
    }
    public long getOrder_id() {
        return order_id;
    }
    public void setOrder_id(long order_id) {
        this.order_id = order_id;
    }
    public long getGoods_id() {
        return goods_id;
    }
    public void setGoods_id(long goods_id) {
        this.goods_id = goods_id;
    }
    public long getGoods_num() {
        return goods_num;
    }
    public void setGoods_num(long goods_num) {
        this.goods_num = goods_num;
    }
    
    public TbGoods getGoods() {
        return goods;
    }
    public void setGoods(TbGoods goods) {
        this.goods = goods;
    }
    @Override
    public String toString() {
        return "TbOrderDetail [id=" + id + ", order_id=" + order_id + ", goods_id=" + goods_id + ", goods_num="
                + goods_num + "]";
    }
    
}

 

　　TbUser.java：

package cn.zzsxt.entity;

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

public class TbUser implements Serializable{
    private long id;
    private String username;
    private String sex;
    private Date birthday;
    private String address;
    //用戶與訂單:一對多
    private List<TbOrder> orderList;
    
    public long getId() {
        return id;
    }
    public void setId(long id) {
        this.id = id;
    }
    public String getUsername() {
        return username;
    }
    public void setUsername(String username) {
        this.username = username;
    }
    public String getSex() {
        return sex;
    }
    public void setSex(String sex) {
        this.sex = sex;
    }
    public Date getBirthday() {
        return birthday;
    }
    public void setBirthday(Date birthday) {
        this.birthday = birthday;
    }
    public String getAddress() {
        return address;
    }
    public void setAddress(String address) {
        this.address = address;
    }
    
    public List<TbOrder> getOrderList() {
        return orderList;
    }
    public void setOrderList(List<TbOrder> orderList) {
        this.orderList = orderList;
    }
    @Override
    public String toString() {
        return "TbUser [id=" + id + ", username=" + username + ", sex=" + sex + ", birthday=" + birthday + ", address="
                + address + "]";
    }
    
}

　　TbOrderQuery01.java：

package cn.zzsxt.vo;

import cn.zzsxt.entity.TbOrder;

public class TbOrderQuery01 extends TbOrder {
    private String username;
    private String sex;
    public String getUsername() {
        return username;
    }
    public void setUsername(String username) {
        this.username = username;
    }
    public String getSex() {
        return sex;
    }
    public void setSex(String sex) {
        this.sex = sex;
    }
    @Override
    public String toString() {
        return "TbOrderQuery01 [username=" + username + ", sex=" + sex + "]"+super.toString();
    }
    
}

 

　　TbOrderQuery02.java：

package cn.zzsxt.vo;

import cn.zzsxt.entity.TbOrder;
import cn.zzsxt.entity.TbUser;

public class TbOrderQuery02 extends TbOrder {
    private TbUser user;

    public TbUser getUser() {
        return user;
    }

    public void setUser(TbUser user) {
        this.user = user;
    }

    @Override
    public String toString() {
        return "TbOrderQuery02:"+super.toString()+" [user=" + user + "]";
    }
    
}

 

　　TbOrderQuery03.java：

package cn.zzsxt.vo;

import java.util.List;

import cn.zzsxt.entity.TbOrder;
import cn.zzsxt.entity.TbOrderDetail;
import cn.zzsxt.entity.TbUser;

public class TbOrderQuery03 extends TbOrder {
    //訂單與用戶:一對一
    private TbUser user;
    //訂單與訂單明細:一對多
    private List<TbOrderDetail> orderDetailList;
    
    public TbUser getUser() {
        return user;
    }
    public void setUser(TbUser user) {
        this.user = user;
    }
    public List<TbOrderDetail> getOrderDetailList() {
        return orderDetailList;
    }
    public void setOrderDetailList(List<TbOrderDetail> orderDetailList) {
        this.orderDetailList = orderDetailList;
    }
    @Override
    public String toString() {
        return "TbOrderQuery03 [user=" + user + ", orderDetailList=" + orderDetailList + ", toString()="
                + super.toString() + "]";
    }
    
}

　　TbOrderMapper.java：

package cn.zzsxt.mapper;

import java.util.List;

import cn.zzsxt.entity.TbUser;
import cn.zzsxt.vo.TbOrderQuery01;
import cn.zzsxt.vo.TbOrderQuery02;
import cn.zzsxt.vo.TbOrderQuery03;

public interface TbOrderMapper {
    /**
     * 查詢訂單信息，關聯用戶信息
     * @return
     */
    List<TbOrderQuery01> findOrderAndUser();
    /**
     * 查詢訂單信息，關聯用戶信息，將查詢結果封裝成自定義的resultMap中
     * @return
     */
    List<TbOrderQuery02> findOrderAndUserResultMap();
    
    /**
     * 查詢訂單信息，關聯用戶信息和訂單明細
     * @return
     */
    List<TbOrderQuery03> findOrderAndDetailAndUser();
    /**
     * 查詢用戶信息，關聯訂單信息，訂單明細和商品信息
     * @return
     */
    List<TbUser> findUserAndGoods();
}

 

　　TbOrderMapper.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="cn.zzsxt.mapper.TbOrderMapper">
    <!-- 查詢訂單信息關聯用戶信息 一對一 -->
    <select id="findOrderAndUser" resultType="cn.zzsxt.vo.TbOrderQuery01">
        SELECT
          tb_order.id,
          tb_order.user_id,
          tb_order.order_number,
          tb_user.username,
          tb_user.sex
        FROM tb_order, tb_user
        WHERE tb_order.user_id = tb_user.id
    </select>
    <!-- 自定義resultMap -->
    <resultMap type="cn.zzsxt.vo.TbOrderQuery02" id="orderAndUserResultMap">
         <id  column="order_id" property="id"/>
         <result column="user_id" property="user_id"/>
         <result column="order_number" property="order_number"/>
         <result column="detail" property="detail"/>
         <!-- 一對一關聯 -->
         <association property="user" javaType="cn.zzsxt.entity.TbUser">
             <id column="id" property="id"/>
             <result column="username" property="username"/>
             <result column="sex" property="sex"/>
             <result column="birthday" property="birthday"/>
             <result column="address" property="address"/>
         </association>
    </resultMap>
    <select id="findOrderAndUserResultMap" resultMap="orderAndUserResultMap">
         SELECT
            tb_order.id order_id,
            tb_order.user_id,
            tb_order.order_number,
            tb_order.detail,
            tb_user.username,
            tb_user.sex,
            tb_user.birthday,
            tb_user.address
            FROM tb_order, tb_user
            WHERE tb_order.user_id = tb_user.id
    </select>
    <!-- 自定義resultMap -->
    <resultMap type="cn.zzsxt.vo.TbOrderQuery03" id="orderAndDetailAndUserResultMap">
         <id  column="order_id" property="id"/>
         <result column="user_id" property="user_id"/>
         <result column="order_number" property="order_number"/>
         <result column="create_time" property="create_time"/>
         <result column="detail" property="detail"/>
         <!-- 一對一關聯 -->
         <association property="user" javaType="cn.zzsxt.entity.TbUser">
             <id column="id" property="id"/>
             <result column="username" property="username"/>
             <result column="sex" property="sex"/>
             <result column="birthday" property="birthday"/>
             <result column="address" property="address"/>
         </association>
         <!-- 一對多關聯 -->
         <collection property="orderDetailList" ofType="cn.zzsxt.entity.TbOrderDetail">
             <id column="detail_id" property="id"/>
             <result column="goods_id" property="goods_id"/>
             <result column="goods_num" property="goods_num"/>
         </collection>
    </resultMap>
    <select id="findOrderAndDetailAndUser" resultMap="orderAndDetailAndUserResultMap">
        SELECT
          tb_order.id order_id,
          tb_order.user_id,
          tb_order.order_number,
          tb_order.create_time,
          tb_order.detail,
          tb_user.username,
          tb_user.sex,
          tb_user.birthday,
          tb_user.address,
          tb_order_detail.id detail_id,
          tb_order_detail.goods_id,
          tb_order_detail.goods_num
        FROM tb_order, tb_user, tb_order_detail
        WHERE tb_order.user_id = tb_user.id
              AND tb_order.id = tb_order_detail.order_id
    </select>
    <!-- 多對多 -->
    <resultMap type="cn.zzsxt.entity.TbUser" id="userAndGoodsResultMap">
        <id column="user_id" property="id"/>
        <result column="username" property="username"/>
        <result column="sex" property="sex"/>
        <result column="birthday" property="birthday"/>
        <result column="address" property="address"/>
        <!-- 一對多 -->
        <collection property="orderList" ofType="cn.zzsxt.entity.TbOrder">
             <id  column="order_id" property="id"/>
             <result column="order_number" property="order_number"/>
             <result column="create_time" property="create_time"/>
             <result column="detail" property="detail"/>
             <!-- 一對多 -->
             <collection property="orderDetailList" ofType="cn.zzsxt.entity.TbOrderDetail">
                <id column="detail_id" property="id"/>
                 <result column="goods_id" property="goods_id"/>
                 <result column="goods_num" property="goods_num"/>
                 <!-- 一對一 -->
                 <association property="goods" javaType="cn.zzsxt.entity.TbGoods">
                         <result column="name" property="name"/>
                         <result column="price" property="price"/>
                         <result column="goods_create_time" property="create_time"/>
                         <result column="goods_detail" property="detail"/>
                 </association>
             </collection>
        </collection>
    </resultMap>
    <select id="findUserAndGoods" resultMap="userAndGoodsResultMap">
    SELECT
      tb_user.id user_id,
      tb_user.username,
      tb_user.sex,
      tb_user.birthday,
      tb_user.address,
      tb_order.id order_id,
      tb_order.order_number,
      tb_order.create_time,
      tb_order.detail,
      tb_order_detail.id detail_id,
      tb_order_detail.goods_id,
      tb_order_detail.goods_num,
      tb_goods.name,
      tb_goods.price,
      tb_goods.create_time goods_create_time,
      tb_goods.detail goods_detail
    FROM tb_order, tb_user, tb_order_detail, tb_goods
    WHERE tb_order.user_id = tb_user.id
          AND tb_order.id = tb_order_detail.order_id
          AND tb_order_detail.goods_id = tb_goods.id
    </select>
    
</mapper>        

　　TestOrderMapper.java：

package cn.zzsxt.test;

import java.io.InputStream;
import java.util.List;

import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;
import org.junit.Test;

import cn.zzsxt.entity.TbGoods;
import cn.zzsxt.entity.TbOrder;
import cn.zzsxt.entity.TbOrderDetail;
import cn.zzsxt.entity.TbUser;
import cn.zzsxt.mapper.TbOrderMapper;
import cn.zzsxt.vo.TbOrderQuery01;
import cn.zzsxt.vo.TbOrderQuery02;
import cn.zzsxt.vo.TbOrderQuery03;

public class TestOrderMapper {
    @Test
    public void testFindOrderAndUser(){
        InputStream ips = this.getClass().getResourceAsStream("/mybatis-config.xml");
        SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(ips);
        SqlSession sqlSession = sqlSessionFactory.openSession();
        TbOrderMapper orderMapper = sqlSession.getMapper(TbOrderMapper.class);
        List<TbOrderQuery01> list = orderMapper.findOrderAndUser();
        for (TbOrderQuery01 tbOrderQuery01 : list) {
            System.out.println(tbOrderQuery01);
        }
    }
    
    @Test
    public void testFindOrderAndUserResultMap(){
        InputStream ips = this.getClass().getResourceAsStream("/mybatis-config.xml");
        SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(ips);
        SqlSession sqlSession = sqlSessionFactory.openSession();
        TbOrderMapper orderMapper = sqlSession.getMapper(TbOrderMapper.class);
        List<TbOrderQuery02> list = orderMapper.findOrderAndUserResultMap();
        for (TbOrderQuery02 tbOrderQuery02 : list) {
            System.out.println(tbOrderQuery02);
        }
    }
    
    @Test
    public void testFindOrderAndDetailAndUser(){
        InputStream ips = this.getClass().getResourceAsStream("/mybatis-config.xml");
        SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(ips);
        SqlSession sqlSession = sqlSessionFactory.openSession();
        TbOrderMapper orderMapper = sqlSession.getMapper(TbOrderMapper.class);
        List<TbOrderQuery03> list = orderMapper.findOrderAndDetailAndUser();
        for (TbOrderQuery03 tbOrderQuery03 : list) {
            System.out.println(tbOrderQuery03);
        }
    }
    
    @Test
    public void testFindUserAndGoods(){
        InputStream ips = this.getClass().getResourceAsStream("/mybatis-config.xml");
        SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(ips);
        SqlSession sqlSession = sqlSessionFactory.openSession();
        TbOrderMapper orderMapper = sqlSession.getMapper(TbOrderMapper.class);
        List<TbUser> list = orderMapper.findUserAndGoods();
        for (TbUser tbUser : list) {
            System.out.println("用戶信息:"+tbUser);
            List<TbOrder> orderList = tbUser.getOrderList();//獲取訂單信息
            System.out.println("訂單信息:");
            for (TbOrder tbOrder : orderList) {
                System.out.println(tbOrder);
                System.out.println("訂單明細:");
                List<TbOrderDetail> orderDetailList = tbOrder.getOrderDetailList();//獲取訂單明細
                for (TbOrderDetail tbOrderDetail : orderDetailList) {
                    System.out.println(tbOrderDetail);
                    //獲取商品信息
                    TbGoods tbGoods = tbOrderDetail.getGoods();
                    System.out.println(tbGoods);
                }
            }
        }
    }
}