mybatis的三种批量插入以及次效率比较

CREATE TABLE `t_user` (
  `id` varchar(32) CHARACTER SET utf8 NOT NULL COMMENT '主键',
  `name` varchar(50) CHARACTER SET utf8 DEFAULT NULL COMMENT '用户名',
  `del_flag` char(1) CHARACTER SET utf8 DEFAULT NULL COMMENT '删除标示',
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1;

mysql.driver=com.mysql.jdbc.Driver
mysql.url=jdbc:mysql://127.0.0.1:3306/ssm
mysql.username=root
mysql.password=admin
#定义初始连接数
mysql.initialSize=1
#定义最大连接数
mysql.maxActive=20
#定义最大空闲
mysql.maxIdle=20
#定义最小空闲
mysql.minIdle=1
#定义最长等待时间
mysql.maxWait=60000

<context:component-scan base-package="com.win.ssm"/>
<context:property-placeholder location="classpath:jdbc.properties"/>
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
    <property name="driverClassName" value="${mysql.driver}"/>
    <property name="url" value="${mysql.url}"/>
    <property name="username" value="${mysql.username}"/>
    <property name="password" value="${mysql.password}"/>
    <!-- 初始化链接大小-->
<property name="initialSize" value="${mysql.initialSize}"/>
    <!-- 连接池最大数量-->
<property name="maxActive" value="${mysql.maxActive}"/>
    <!-- 连接池最大空闲-->
<property name="maxIdle" value="${mysql.maxIdle}"/>
    <!-- 连接池最小空闲 -->
<property name="minIdle" value="${mysql.minIdle}"></property>
    <!-- 获取连接最大等待时间-->
<property name="maxWait" value="${mysql.maxWait}"/>
</bean>
<!-- spring与mybatis整合类 -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
    <property name="dataSource" ref="dataSource"/>
    <!-- 查找接口的别名 -->
<property name="typeAliasesPackage" value="com.win"/>
    <!-- 自动扫描mapping.xml文件-->
<property name="mapperLocations" value="classpath:/mapping/*.xml"/>
</bean>

<bean id="sqlSessionTemplate" class="org.mybatis.spring.SqlSessionTemplate">
    <constructor-arg index="0" ref="sqlSessionFactory" />
    <!--<constructor-arg index="1" value="BATCH" />-->
</bean>

<!-- 扫描DAO接口 -->
<bean id="mapperScannerConfigurer" class="org.mybatis.spring.mapper.MapperScannerConfigurer">
    <property name="basePackage" value="com.win.ssm.dao"/>
    <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
</bean>
<!-- 事务管理 -->
<bean class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
    <property name="dataSource" ref="dataSource"/>
</bean>

@Test
public void testInsertBatch2() throws Exception {
    long start = System.currentTimeMillis();
    User user;
    SqlSession sqlSession = sqlSessionTemplate.getSqlSessionFactory().openSession(false);
    UserDao mapper = sqlSession.getMapper(UserDao.class);
    for (int i = 0; i < 500; i++) {
        user = new User();
        user.setId("test" + i);
        user.setName("name" + i);
        user.setDelFlag("0");
        mapper.insert(user);
    }
    sqlSession.commit();
    long end = System.currentTimeMillis();
    System.out.println("---------------" + (start - end) + "---------------");
}

<insert id="insert">
    INSERT INTO t_user (id, name, del_flag)
          VALUES(#{id}, #{name}, #{delFlag})
</insert>

@Test
public void testInsertBatch2() throws Exception {
    long start = System.currentTimeMillis();
    User user;
    SqlSession sqlSession = sqlSessionTemplate.getSqlSessionFactory().openSession(ExecutorType.BATCH, false);//跟上述sql区别
    UserDao mapper = sqlSession.getMapper(UserDao.class);
    for (int i = 0; i < 500; i++) {
        user = new User();
        user.setId("test" + i);
        user.setName("name" + i);
        user.setDelFlag("0");
        mapper.insert(user);
    }
    sqlSession.commit();
    long end = System.currentTimeMillis();
    System.out.println("---------------" + (start - end) + "---------------");
}

@Test
public void testInsertBatch() throws Exception {
    long start = System.currentTimeMillis();
    List<User> list = new ArrayList<>();
    User user;
    for (int i = 0; i < 10000; i++) {
        user = new User();
        user.setId("test" + i);
        user.setName("name" + i);
        user.setDelFlag("0");
        list.add(user);
    }
    userService.insertBatch(list);
    long end = System.currentTimeMillis();
    System.out.println("---------------" + (start - end) + "---------------");
}

<insert id="insertBatch">
    INSERT INTO t_user
            (id, name, del_flag)
    VALUES
    <foreach collection ="list" item="user" separator =",">
         (#{user.id}, #{user.name}, #{user.delFlag})
    </foreach >
</insert>

nested exception is com.mysql.jdbc.PacketTooBigException: Packet for query is too large (5677854 > 1048576).

You can change this value on the server by setting the max_allowed_packet' variable.