MyBatis批量操作_MySql

1.配置文件

   jdbc.properties

 

#MySql
jdbc.driverClassName=com.mysql.jdbc.Driver
jdbc.url=jdbc\:mysql\://127.0.0.1\:3306/mybatis?useUnicode\=true&characterEncoding\=UTF-8&allowMultiQueries\=true
jdbc.username=root
jdbc.password=root

 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>
	<properties resource="jdbc.properties"/>
	<typeAliases>
		<package name="com.mybatis.model"/>
	</typeAliases>
	<environments default="development">
		<environment id="development">
			<transactionManager type="JDBC" />
			<dataSource type="POOLED">
				<property name="driver" value="${jdbc.driverClassName}" />
				<property name="url" value="${jdbc.url}" />
				<property name="username" value="${jdbc.username}" />
				<property name="password" value="${jdbc.password}" />
			</dataSource>
		</environment>
		<environment id="test">
			<transactionManager type="JDBC" />
			<dataSource type="POOLED">
				<property name="driver" value="${jdbc.driverClassName}" />
				<property name="url" value="${jdbc.url}" />
				<property name="username" value="${jdbc.username}" />
				<property name="password" value="${jdbc.password}" />
			</dataSource>
		</environment>
	</environments>
	<mappers>
		<package name="com.mybatis.mappers"/>
	</mappers>
</configuration>

 2.接口Mapper:StudentMapppackage com.mybatis.mappers;

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

import com.mybatis.model.Student;

public interface StudentMapper {
	/**
	 * 通过List集合批量插入
	 * @param list
	 * @return
	 */
	public int batchInsertStudentWithList(List<Student> list);
	/**
	 * 通过IdList进行Update特定字段为特定值
	 * @param list
	 * @return
	 */
	public int batchUpdateByIdList(List<Integer> list);
	/**
	 * 通过Map批量更新
	 * @param map
	 * @return
	 */
	public int batchUpdateStudentWithMap(Map<String, Object> map);
	/**
	 * 通过List集合批量更新
	 * @param list
	 * @return
	 */
	public int batchUpdateStudentWithList(List<Student> list);
	
	/**
	 * 通过数组进行批量删除
	 * @param array
	 * @return
	 */
	public int batchDeleteStudentWithArray(int array[]);
	/**
	 * 能过IdList进行批量删除
	 * @param list
	 * @return
	 */
	public int batchDeleteStudentWithIdList(List<Integer> list);
	/**
	 * 通过list删除
	 * @param list
	 * @return
	 */
	public int batchDeleteStudentWithList(List<Student> list);
	/**
	 * 通过list中对象进行删除
	 * @param list
	 * @return
	 */
	public int batchDeleteStudentWithListOnlyId(List<Student> list);
}

 3.Mapper配置StudentMapper

 

 

<?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.mappers.StudentMapper">

	<!-- 1，size:表示缓存cache中能容纳的最大元素数。默认是1024； 
		 2，flushInterval:定义缓存刷新周期，以毫秒计； 
		 3，eviction:定义缓存的移除机制；默认是LRU(least recently userd，最近最少使用),还有FIFO(first in 
			first out，先进先出) 
		 4，readOnly:默认值是false，假如是true的话，缓存只能读。 -->
	<cache size="1024" flushInterval="60000" eviction="LRU" readOnly="false" />

	<resultMap type="Student" id="StudentResult">
		<id property="id" column="id" />
		<result property="name" column="name" />
	</resultMap>

	<delete id="batchDeleteStudentWithArray" parameterType="java.lang.String">
		DELETE FROM t_student where id in
		<foreach item="idItem" collection="array" open="(" separator=","
			close=")">
			#{idItem}
		</foreach>
	</delete>
	
	<delete id="batchDeleteStudentWithIdList" parameterType="java.util.List">
		DELETE FROM t_student where id in
		<foreach collection="list" item="idItem" index="index" open="("
			separator="," close=")">
			#{idItem}
		</foreach>
	</delete>
	
	
	<delete id="batchDeleteStudentWithListOnlyId" parameterType="java.util.List">
		DELETE FROM t_student where id in
		<foreach collection="list" index="index" item="item" open="("  
            separator="," close=")">  
            #{item.id}  
        </foreach>  
	</delete>
	
	
	<!-- 效率低，不推荐 -->
	<delete id="batchDeleteStudentWithList" parameterType="java.util.List">
		<foreach collection="list" item="item" index="index" open="" close="" separator=";">
		DELETE  FROM t_student
			where id=#{item.id}
		</foreach>
	</delete>
	
	<update id="batchUpdateByIdList" parameterType="java.util.List">
		UPDATE t_student set name='test' where id in
		<foreach collection="list" item="idItem" index="index" open="("
			separator="," close=")">
			#{idItem}
		</foreach>
	</update>

	<update id="batchUpdateStudentWithList" parameterType="java.util.List">
		<foreach collection="list" item="item" index="index" open="" close="" separator=";">
		UPDATE t_student
			<set>
				name=#{item.name}
			</set>
			where id=#{item.id}
		</foreach>
	</update>

	<update id="batchUpdateStudentWithMap" parameterType="java.util.Map">
		UPDATE t_student SET name = #{name} WHERE id IN
		<foreach collection="idList" index="index" item="idItem" open="("
			separator="," close=")">
			#{idItem}
		</foreach>
	</update>
	
	<insert id="batchInsertStudentWithList" parameterType="java.util.List">
		INSERT INTO /*+append_values */ t_student (name)
		VALUES
		<foreach collection="list" item="item" index="index" separator=",">
			(#{item.name})
		</foreach>
	</insert>
</mapper> 

 4.SqlSessionFactoryUtil

package com.mybatis.util;

import java.io.InputStream;

import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;

public class SqlSessionFactoryUtil {

	private static SqlSessionFactory sqlSessionFactory;
	
	public static SqlSessionFactory getSqlSessionFactory(){
		if(sqlSessionFactory==null){
			InputStream inputStream=null;
			try{
				inputStream=Resources.getResourceAsStream("mybatis-config.xml");
				sqlSessionFactory=new SqlSessionFactoryBuilder().build(inputStream);
			}catch(Exception e){
				e.printStackTrace();
			}
		}
		return sqlSessionFactory;
	}
	
	public static SqlSession openSession(){
		return getSqlSessionFactory().openSession();
	}
}

 5.Model:Student

package com.mybatis.model;

import java.io.Serializable;

public class Student implements Serializable {

	private Integer id;
	private String name;
	private byte[] pic;// blob
	private String remark;// clob
	public Student() {
		super();
		// TODO Auto-generated constructor stub
	}

	public Student(Integer id, String name) {
		super();
		this.id = id;
		this.name = name;
	}

	public Student(String namee) {
		super();
		this.name = name;
	}

	public Integer getId() {
		return id;
	}

	public void setId(Integer id) {
		this.id = id;
	}

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public byte[] getPic() {
		return pic;
	}

	public void setPic(byte[] pic) {
		this.pic = pic;
	}

	public String getRemark() {
		return remark;
	}

	public void setRemark(String remark) {
		this.remark = remark;
	}

	@Override
	public String toString() {
		return "Student [id=" + id + ", name=" + name + ", remark=" + remark + "]";
	}

}

6.测试类

package com.mybatis.service;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.apache.ibatis.session.SqlSession;
import org.apache.log4j.Logger;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;

import com.mybatis.mappers.StudentMapper;
import com.mybatis.model.Student;
import com.mybatis.util.SqlSessionFactoryUtil;

public class StudentBatchTest {

	private static Logger logger=Logger.getLogger(Student.class);
	private SqlSession sqlSession=null;
	private StudentMapper studentMapper=null;
	
	/**
	 * 测试方法前调用
	 * @throws Exception
	 */
	@Before
	public void setUp() throws Exception {
		sqlSession=SqlSessionFactoryUtil.openSession();
		studentMapper=sqlSession.getMapper(StudentMapper.class);
	}

	/**
	 * 测试方法后调用
	 * @throws Exception
	 */
	@After
	public void tearDown() throws Exception {
		sqlSession.close();
	}
	
	//通过list进行批量插入
	@Test
	public void batchInsertStudentWithList(){
		  List<Student> list= new ArrayList<Student>();
		    for(int i = 2;i < 10;i++){
		        Student student = new Student();
		        student.setName("test" + i);
		        list.add(student);
		    }
		    int n=studentMapper.batchInsertStudentWithList(list);
		    System.out.println("成功插入"+n+"条记录");
		    sqlSession.commit();
	}
	//分页批量插入
	@Test
	public void batchInsertStudentPage(){
	    List<Student> list= new ArrayList<Student>();
	    for(int i = 0;i < 2000;i++){
	        Student student = new Student();
	        student.setName("test" + i);
	        list.add(student);
	    }
	    try {
			save(list);
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
	
	private void save(List<Student> uidCodeList) throws Exception {
		SqlSession batchSqlSession = null;
		try {
			batchSqlSession =SqlSessionFactoryUtil.openSession();//获取批量方式的sqlsession		
			int batchCount = 1000;//每批commit的个数
			int batchLastIndex = batchCount - 1;//每批最后一个的下标
			for(int index = 0; index < uidCodeList.size()-1;){
				if(batchLastIndex > uidCodeList.size()-1){
					batchLastIndex = uidCodeList.size() - 1;
					batchSqlSession.insert("com.mybatis.mappers.StudentMapper.batchInsertStudentWithList", uidCodeList.subList(index, batchLastIndex+1));
					batchSqlSession.commit();
					System.out.println("index:"+index+"     batchLastIndex:"+batchLastIndex);
					break;//数据插入完毕,退出循环
					
				}else{
					batchSqlSession.insert("com.mybatis.mappers.StudentMapper.batchInsertStudentWithList", uidCodeList.subList(index, batchLastIndex+1));					                batchSqlSession.commit();
					System.out.println("index:"+index+"     batchLastIndex:"+batchLastIndex);
					index = batchLastIndex + 1;//设置下一批下标
					batchLastIndex = index + (batchCount - 1);						
				}				
			}						
		}finally{
			batchSqlSession.close();
		}		
	}
	//通过IdList批量更新
	@Test
	public void batchUpdateByIdList() {
		logger.info("通过IdList批量更新");
		List<Integer> list = new ArrayList<Integer>();
		list.add(5);
		list.add(6);
		int n = studentMapper.batchUpdateByIdList(list);
		System.out.println("成功更新" + n + "条记录");
		sqlSession.commit();
	}

	//通过map进行批量更新
	@Test
	public void batchUpdateStudentWithMap() {
		List<Integer> ls = new ArrayList<Integer>();
		for (int i = 5; i < 7; i++) {
			ls.add(i);
		}
		Map<String, Object> map = new HashMap<String, Object>();
		map.put("idList", ls);
		map.put("name", "小群11");
		int n = studentMapper.batchUpdateStudentWithMap(map);
		System.out.println("成功更新" + n + "条记录");
		sqlSession.commit();
	}
	//通过list批量更新
	@Test
	public void batchUpdateStudentWithList() {
		logger.info("更新学生(带条件)");
		List<Student> list = new ArrayList<Student>();
		list.add(new Student(6, "张三aa"));
		list.add(new Student(6, "李四aa"));
		int n = studentMapper.batchUpdateStudentWithList(list);
		System.out.println("成功更新" + n + "条记录");
		sqlSession.commit();
	}
	
	//通过Array进行批量删除
	@Test
	public void batchDeleteStudentWithArray() {
		logger.info("删除学生，通过Array");
		int array[] = new int[] { 3, 4 };
		studentMapper.batchDeleteStudentWithArray(array);
		sqlSession.commit();
	}
	@Test
	public void batchDeleteStudentWithIdList() {
		logger.info("通过IdList批量更新");
		List<Integer> list = new ArrayList<Integer>();
		list.add(9);
		list.add(10);
		int n = studentMapper.batchDeleteStudentWithIdList(list);
		System.out.println("成功删除" + n + "条记录");
		sqlSession.commit();
	}
	@Test
	public void batchDeleteStudentWithList() {
		logger.info("通过IdList批量更新");
		List<Student> list = new ArrayList<Student>();
		list.add(new Student(12, null));
		list.add(new Student(13, null));
		int n = studentMapper.batchDeleteStudentWithList(list);
		System.out.println("成功删除" + n + "条记录");
		sqlSession.commit();
	}
	
	@Test
	public void batchDeleteStudentWithListOnlyId() {
		logger.info("通过IdList批量更新");
		List<Student> list = new ArrayList<Student>();
		list.add(new Student(14, null));
		list.add(new Student(15, null));
		int n = studentMapper.batchDeleteStudentWithListOnlyId(list);
		System.out.println("成功删除" + n + "条记录");
		sqlSession.commit();
	}
	
}