Mybatis 批量插入数据的三种方式

灰太狼 2022-11-18 13:43 211阅读 0赞

1.for循环insert

long start = System.currentTimeMillis();
        for(int i = 0 ;i < 100000; i++) { 
            User user = new User();
            user.setId("id" + i);
            user.setName("name" + i);
            user.setPassword("password" + i);
            userMapper.insert(user);
        }
        long end = System.currentTimeMillis();
        System.out.println("---------------" + (start - end) + "---------------");

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

时间为380826ms

2.Mybatis batch模式

SqlSession sqlSession = sqlSessionTemplate.getSqlSessionFactory().openSession(ExecutorType.BATCH, false);//跟上述sql区别
            UserMapper userMapper = sqlSession.getMapper(UserMapper.class);
    
            long start = System.currentTimeMillis();
            for (int i = 0; i < 100000; i++) { 
                User user = new User();
                user.setId("id" + i);
                user.setName("name" + i);
                user.setPassword("password" + i);
                userMapper.insert(user);
            }
            sqlSession.commit();
            long end = System.currentTimeMillis();
            System.out.println("---------------" + (start - end) + "---------------");

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

时间为203660ms

3.批量foreach插入

long start = System.currentTimeMillis();
            List<User> userList = new ArrayList<>();
            for (int i = 0; i < 100000; i++) { 
                User user = new User();
                user.setId("id" + i);
                user.setName("name" + i);
                user.setPassword("password" + i);
                userMapper.insert(user);
            }
            userMapper.insertBatch(userList);
            long end = System.currentTimeMillis();
            System.out.println("---------------" + (start - end) + "---------------");

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

时间为8706ms

插入三种方式，文章参考：https://segmentfault.com/a/1190000021290975?utm\_source=tag-newest

> 如果批量增加数据量较多时 建议采用batch模式，foreach一次性插入数据量建议10-100条，for循环是最不建议的方式，需要频繁的建立关闭数据库连接，比较耗时。