1.表结构
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;
2.1 jdbc.properties配置
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
2.2 spring-mybatis.xml配置
<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>
第一种:普通for循环插入
①junit类
@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) + "---------------"); }
②xml配置
<insert id="insert">
INSERT INTO t_user (id, name, del_flag)
VALUES(#{id}, #{name}, #{delFlag})
</insert>
第二种:mybatis BATCH模式插入
①junit类
@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) + "---------------"); }
②xml配置与第一种②中使用相同
第三种:foreach方式插入
①junit类
@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) + "---------------"); }
②xml配置
<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>
特别注意:mysql默认接受sql的大小是1048576(1M),即第三种方式若数据量超过1M会报如下异常:(可通过调整MySQL安装目录下的my.ini文件中[mysqld]段的"max_allowed_packet = 1M")
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.
结果对比:
第一种 | 第二种 | 第三种 | |
500条 | 7742 | 7388 | 622 |
1000条 | 15290 | 15078 | 746 |
5000条 | 78011 | 177350 | 1172 |
10000条 | 397472 | 201180 | 1205 |