dataSource.driver=com.mysql.jdbc.Driver
dataSource.url=jdbc:mysql://localhost:3306/mybatis?useUnicode=true&characterEncoding=utf8
dataSource.username=blog
dataSource.password=blog

<?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>
<!--  引入外部配置文件-->
	<properties resource="db.properties"></properties>
	<!-- 別名設(shè)置，不設(shè)置時(shí)引用要使用全包名，設(shè)置后可以使用自定義別名，更加簡(jiǎn)潔 -->
	<typeAliases>
		<!-- 別名設(shè)置有兩種，一種是一個(gè)一個(gè)設(shè)置，另外一種是設(shè)置某個(gè)包，默認(rèn)別名為類名（大小寫都可以，建議小寫） -->
		<!-- 第一種設(shè)置 
	 	<typeAlias type="com.mybatis_demo.domain.User" alias="user"/>-->
	 	<!-- 第二種設(shè)置，整個(gè)包下面的類都進(jìn)行別名設(shè)置，推薦第二種 -->
	 	<package name="com.mybatis_demo.domain"/>
	 </typeAliases>
<!-- 環(huán)境模式：development開發(fā)模式 work工作模式 -->
  <environments default="development">
  <!-- 環(huán)境變量 -->
    <environment id="development">
    <!-- 使用jdbc的事務(wù)管理 -->
      <transactionManager type="JDBC"/>
      <!-- 使用連接池 -->
      <dataSource type="POOLED">
        <property name="driver" value="${dataSource.driver}"/>
        <property name="url" value="${dataSource.url}"/>
        <property name="username" value="${dataSource.username}"/>
        <property name="password" value="${dataSource.password}"/>
      </dataSource>
    </environment>
  </environments>
  <!-- 引入mapper映射文件 -->
  <mappers>
  <!--  1.相對(duì)路徑引入-->
   <!--  <mapper resource="mapper/UserMapper.xml"/> -->
    <!-- 2.絕對(duì)路徑引入 -->
    <!-- <mapper url="file:\\\D:\sts-bundle\workplace\mybatis_demo\src\main\resources\mapper\UserMapper.xml"/> -->
    <!-- 3.對(duì)應(yīng)mapper接口全包名引入，需要對(duì)應(yīng)的mapper.xml與接口mapper處于同一包下才可以，且xml文件名與接口名要相同，xml文件中的namespace必須是對(duì)應(yīng)接口的全包名 -->
    <!-- <mapper class="com.mybatis_demo.mapper.UserMapper"/> -->
    <!-- 4.包引入，要求跟接口引入一樣 -->
   <!--  <mapper resource="mapper/UserMapper2.xml"/> -->
    <package name="com.mybatis_demo.mapper"/>
  </mappers>
</configuration>

package com.mybatis_demo.domain;
public class User {
	private Integer uid;
	private String uname;
	private Integer age;
	private String address;
	public Integer getUid() {
		return uid;
	}
	public void setUid(Integer uid) {
		this.uid = uid;
	}
	public String getUname() {
		return uname;
	}
	public void setUname(String uname) {
		this.uname = uname;
	}
	public Integer getAge() {
		return age;
	}
	public void setAge(Integer age) {
		this.age = age;
	}
	public String getAddress() {
		return address;
	}
	public void setAddress(String address) {
		this.address = address;
	}
	@Override
	public String toString() {
		return "User [uid=" + uid + ", uname=" + uname + ", age=" + age + ", address=" + address + "]";
	}
}

package com.mybatis_demo.domain;
import java.util.List;
public class UserVo extends User {
	private Integer[] ids;
	private List<Integer> idList;
	public Integer[] getIds() {
		return ids;
	}
	public void setIds(Integer[] ids) {
		this.ids = ids;
	}
	public List<Integer> getIdList() {
		return idList;
	}
	public void setIdList(List<Integer> idList) {
		this.idList = idList;
	}
	
}

<?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_demo.mapper.UserMapper">
<!-- 遍歷list集合，collection="list"，如果你傳參的時(shí)候是直接傳遞list集合，那么這里只能填list,不能填參數(shù)名 -->
<select id="selectByList" resultType="User">
	select * from t_user where uid in
	<foreach collection="list" item="item" open="(" separator="," close=")">
		#{item}
	</foreach>
</select>
<!-- 遍歷數(shù)組 ，collection="array"，如果你傳參的時(shí)候是直接傳遞數(shù)組，那么這里只能填array,不能填參數(shù)名-->
<select id="selectByArray" resultType="User">
	select * from t_user where uid in
	<foreach collection="array" item="item" open="(" separator="," close=")">
		#{item}
	</foreach>
</select>
<!-- 遍歷包裝類中的數(shù)組，collection="ids"，這里不再是array,而是包裝類中對(duì)應(yīng)的變量名，因?yàn)槟銈鬟f的參數(shù)是一個(gè)包裝類，mybatis是通過(guò)get方法獲取包裝類中的數(shù)組 -->
<select id="selectUserVoByArray" parameterType="UserVo" resultType="User">
	select * from t_user where uid in
	<foreach collection="ids" item="item" open="(" separator="," close=")">
		#{item}
	</foreach>
</select>
<!-- 遍歷包裝類中的list集合，collection="idList"，這里不再是list,而是包裝類中對(duì)應(yīng)的變量名，因?yàn)槟銈鬟f的參數(shù)是一個(gè)包裝類，mybatis是通過(guò)get方法獲取包裝類中的list集合 -->
<select id="selectUserVoByList" parameterType="UserVo" resultType="User">
	select * from t_user where uid in
	<foreach collection="idList" item="item" open="(" separator="," close=")">
		#{item}
	</foreach>
</select>
</mapper>

package com.mybatis_demo.mapper;
import java.util.List;
import java.util.Map;
import com.mybatis_demo.domain.User;
import com.mybatis_demo.domain.UserVo;
public interface UserMapper {
	//mybatis使用mapper動(dòng)態(tài)代理
	
	//4大原則，一個(gè)注意
	//1.接口中的方法名需要與對(duì)應(yīng)mapper.xml的id一致
	//2.接口中的返回值需要與對(duì)應(yīng)mapper.xml的返回值類型保持一致
	//3.接口中的參數(shù)需要與對(duì)應(yīng)mapper.xml的參數(shù)類型、個(gè)數(shù)、參數(shù)名保持一致
	//4.對(duì)應(yīng)mapper.xml的名字空間需要修改成對(duì)應(yīng)接口的全包名
	//注意：mapper動(dòng)態(tài)代理根據(jù)返回值類型,mybatis會(huì)自動(dòng)選擇調(diào)用selectone還是selectlist....
	//用list封裝條件
	public List<User> selectByList(List<Integer> testlist);
	//用數(shù)組封裝條件
	public List<User> selectByArray(Integer[] ids);
	//用包裝類中的數(shù)組封裝條件
	public List<User> selectUserVoByArray(UserVo userVo);
	//用包裝類中的list封裝條件
	public List<User> selectUserVoByList(UserVo userVo);	
}

package com.mybatis_demo.test;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;
import org.junit.Test;
import com.mybatis_demo.domain.User;
import com.mybatis_demo.domain.UserVo;
import com.mybatis_demo.mapper.UserMapper;
public class TestMapper {
	
	//用包裝類中的list封裝條件，傳遞參數(shù)是一個(gè)包裝類
	@Test
	public void test_selectUserVoByList() {
		try {
			 //讀取配置文件
			InputStream in = Resources.getResourceAsStream("sqlMapConfig.xml");
			//創(chuàng)建SqlSessionFactoryBuilder對(duì)象，用來(lái)獲取SqlSessionFactory對(duì)象
			SqlSessionFactoryBuilder builder = new SqlSessionFactoryBuilder();
			//利用SqlSessionFactoryBuilder對(duì)象build一個(gè)SqlSessionFactory對(duì)象
			SqlSessionFactory build = builder.build(in);
			//利用sqlSessionFactory獲取session對(duì)象
			SqlSession session = build.openSession();
			//通過(guò)session對(duì)象獲取對(duì)應(yīng)mapper接口
			UserMapper mapper = session.getMapper(UserMapper.class);
			List<Integer> idList = new ArrayList<Integer>();
			idList.add(5);
			idList.add(3);
			idList.add(123);
			idList.add(19);
			UserVo userVo = new UserVo();
			userVo.setIdList(idList);
			List<User> users = mapper.selectUserVoByList(userVo);
			for (User user : users) {
				System.out.println(user);
			}
		} catch (IOException e) {
			e.printStackTrace();
		}
	}
	
	//用包裝類中的array封裝條件，傳遞參數(shù)是一個(gè)包裝類
	@Test
	public void test_selectUserVoByArray() {
		try {
			 //讀取配置文件
			InputStream in = Resources.getResourceAsStream("sqlMapConfig.xml");
			//創(chuàng)建SqlSessionFactoryBuilder對(duì)象，用來(lái)獲取SqlSessionFactory對(duì)象
			SqlSessionFactoryBuilder builder = new SqlSessionFactoryBuilder();
			//利用SqlSessionFactoryBuilder對(duì)象build一個(gè)SqlSessionFactory對(duì)象
			SqlSessionFactory build = builder.build(in);
			//利用sqlSessionFactory獲取session對(duì)象
			SqlSession session = build.openSession();
			//通過(guò)session對(duì)象獲取對(duì)應(yīng)mapper接口
			UserMapper mapper = session.getMapper(UserMapper.class);
			Integer[] ids = new Integer[]{5,9,30};
			UserVo userVo = new UserVo();
			userVo.setIds(ids);
			List<User> users = mapper.selectUserVoByArray(userVo);
			for (User user : users) {
				System.out.println(user);
			}
		} catch (IOException e) {
			e.printStackTrace();
		}
	}
	
	//用數(shù)組封裝條件，傳遞參數(shù)是一個(gè)數(shù)組
	@Test
	public void test_selectByArray() {
		try {
			 //讀取配置文件
			InputStream in = Resources.getResourceAsStream("sqlMapConfig.xml");
			//創(chuàng)建SqlSessionFactoryBuilder對(duì)象，用來(lái)獲取SqlSessionFactory對(duì)象
			SqlSessionFactoryBuilder builder = new SqlSessionFactoryBuilder();
			//利用SqlSessionFactoryBuilder對(duì)象build一個(gè)SqlSessionFactory對(duì)象
			SqlSessionFactory build = builder.build(in);
			//利用sqlSessionFactory獲取session對(duì)象
			SqlSession session = build.openSession();
			//通過(guò)session對(duì)象獲取對(duì)應(yīng)mapper接口
			UserMapper mapper = session.getMapper(UserMapper.class);
			Integer[] ids = new Integer[]{5,9,30};
			List<User> users = mapper.selectByArray(ids);
			for (User user : users) {
				System.out.println(user);
			}
		} catch (IOException e) {
			e.printStackTrace();
		}
	}
	
	//用list封裝條件，傳遞參數(shù)是一個(gè)list集合
	@Test
	public void test_selectByList() {
		try {
			 //讀取配置文件
			InputStream in = Resources.getResourceAsStream("sqlMapConfig.xml");
			//創(chuàng)建SqlSessionFactoryBuilder對(duì)象，用來(lái)獲取SqlSessionFactory對(duì)象
			SqlSessionFactoryBuilder builder = new SqlSessionFactoryBuilder();
			//利用SqlSessionFactoryBuilder對(duì)象build一個(gè)SqlSessionFactory對(duì)象
			SqlSessionFactory build = builder.build(in);
			//利用sqlSessionFactory獲取session對(duì)象
			SqlSession session = build.openSession();
			//通過(guò)session對(duì)象獲取對(duì)應(yīng)mapper接口
			UserMapper mapper = session.getMapper(UserMapper.class);
			List<Integer> list = new ArrayList<Integer>();
			list.add(5);
			list.add(3);
			list.add(123);
			list.add(19);
			List<User> users = mapper.selectByList(list);
			for (User user : users) {
				System.out.println(user);
			}
		} catch (IOException e) {
			e.printStackTrace();
		}
	}
}