How to optimize batch Insert operations in MyBatis

How to efficiently perform batch Insert operations in MyBatis

In actual development, we often encounter situations where we need to insert data in batches, such as inserting multiple data into the database at one time. Records. As an excellent persistence framework, MyBatis provides a variety of ways to implement efficient batch Insert operations. This article will introduce some commonly used methods and provide specific code examples.

Use the foreach tag

The foreach tag in MyBatis is a common batch operation method, which can easily implement batch insertion operations. The following is a sample code:

<insert id="batchInsertUsers" parameterType="java.util.List">
    INSERT INTO users (id, name, age) VALUES
    <foreach collection="list" item="user" separator="," >
        (#{user.id}, #{user.name}, #{user.age})
    </foreach>
</insert>

In the above code, we define an Insert statement of batchInsertUsers, the parameter type is java.util.List, and then use The foreach tag traverses the incoming List and generates the corresponding insertion statement. In this way, multiple records can be inserted into the database at one time, improving the efficiency of the insertion operation.

Using BatchExecutor

In addition to the foreach tag, MyBatis also provides BatchExecutor to support batch operations. By calling the doUpdate method of BatchExecutor, multiple Insert operations can be performed at one time. The following is a sample code:

SqlSessionFactory sqlSessionFactory = MyBatisUtil.getSqlSessionFactory();
try (SqlSession sqlSession = sqlSessionFactory.openSession(ExecutorType.BATCH)) {
    UserDao userDao = sqlSession.getMapper(UserDao.class);
    
    List<User> userList = new ArrayList<>();
    // 构造多条用户数据
    for (int i = 0; i < 1000; i++) {
        User user = new User();
        user.setId(i);
        user.setName("user" + i);
        user.setAge(20 + i % 10);
        userList.add(user);
    }
    
    // 批量插入
    for (User user : userList) {
        userDao.insert(user);
    }
    sqlSession.commit();
}

In the above code, we first create a BatchExecutor type SqlSession, and then construct multiple pieces of user data, through The loop adds multiple Insert operations to the batch execution and ultimately commits them all in one go. This method can greatly improve the efficiency of insertion operations.

Using MyBatis batch processing

In addition, MyBatis also provides a batch method to support batch operations. The following is a sample code:

SqlSessionFactory sqlSessionFactory = MyBatisUtil.getSqlSessionFactory();
try (SqlSession sqlSession = sqlSessionFactory.openSession(ExecutorType.BATCH)) {
    UserDao userDao = sqlSession.getMapper(UserDao.class);
    
    List<User> userList = new ArrayList<>();
    // 构造多条用户数据
    for (int i = 0; i < 1000; i++) {
        User user = new User();
        user.setId(i);
        user.setName("user" + i);
        user.setAge(20 + i % 10);
        userList.add(user);
    }
    
    // 执行批处理
    userDao.batchInsertUsers(userList);
    sqlSession.commit();
}

In the above code, we first create a BatchExecutor type SqlSession, and then construct multiple pieces of user data, and Call the batchInsertUsers method to perform batch operations. This method can also effectively improve the efficiency of insertion operations.

In summary, by using the foreach tag, BatchExecutor or MyBatis's batch processing method, we can efficiently perform batch Insert operations in MyBatis, thereby improving Performance of database operations. In actual projects, you can choose the appropriate method to insert data in batches according to specific needs.

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