Mybatis批量插入哪家强？-优快云博客

本文链接：https://blog.youkuaiyun.com/weixin_42653522/article/details/120341844

前言

本文使用 Mybatis 进行批量插入，比较两种不同的插入方式的区别。

测试

批量插入注意事项：

1、连接数据库时添加参数 allowMultiQueries=true，支持多语句执行，批处理

2、数据库是否支持大量数据写入，设置 max_allowed_packet参数保证批次提交的数据量

拼接 sql

public void batchDemo() {
   long start = System.currentTimeMillis();
    List<User> list = new ArrayList<>();
    for (int i = 0; i < 5000; i++) {
        User user = new User();
        user.setId(UUID.randomUUID().toString());
        user.setName("feiyangyang");
        user.setPwd("feiyangyang");
        list.add(user);
    }
    userService.batchForeach(list);
    long end = System.currentTimeMillis();
    System.out.println("---------------" + (start - end) + "---------------");
}

<insert id="batchForeach" parameterType="com.fyy.druid.entity.User">
    insert into
    user(id,`name`,pwd)
    values
    <foreach collection ="userList" item="user" separator =",">
        (#{user.id}, #{user.name}, #{user.pwd})
    </foreach>
</insert>

batch插入

public void batchInsert() {
    long start = System.currentTimeMillis();
    SqlSession sqlSession = sqlSessionTemplate.getSqlSessionFactory().openSession(ExecutorType.BATCH);
    UserService mapper = sqlSession.getMapper(UserService.class);

    for (int i = 0; i < 5000; i++) {
        User user = new User();
        user.setId(UUID.randomUUID().toString());
        user.setName("feiyangyang");
        user.setPwd("feiyangyang");
        mapper.batchInsert(user);
    }
    sqlSession.commit();
    long end = System.currentTimeMillis();
    System.out.println("---------------" + (start - end) + " ---------------");
}