MyBatis Batch Processing Tutorial

MyBatis offers a batch processing method for executing SQL statements in bulk. Within MyBatis, the BatchExecutor class can be used to perform batch operations. This class includes a batch() method that allows for the simultaneous execution of multiple SQL statements.

When using the batch() method of the BatchExecutor class, multiple SQL statements can be added to a batch list, which are then executed all at once. During the batch operation, MyBatis sends all these SQL statements to the database at once, improving performance.

Here is an example code using MyBatis for batch processing:

SqlSession sqlSession = sqlSessionFactory.openSession(ExecutorType.BATCH);
try {
    BatchExecutor batchExecutor = (BatchExecutor) sqlSession;
    
    // 添加多个SQL语句到批处理列表中
    batchExecutor.batch(StatementType.UPDATE, "updateUser", user1);
    batchExecutor.batch(StatementType.UPDATE, "updateUser", user2);
    batchExecutor.batch(StatementType.UPDATE, "updateUser", user3);

    // 执行批处理操作
    batchExecutor.doFlushStatements();
    
    // 提交事务
    sqlSession.commit();
} finally {
    sqlSession.close();
}

In the example code above, an SqlSession object is created using the openSession() method of SqlSession. The ExecutorType is set to BATCH. Multiple SQL statements are added to a batch list using the batch() method of BatchExecutor. Finally, the doFlushStatements() method is used to execute the batch process and commit the transaction.

Utilizing MyBatis batch operations can significantly boost the performance of executing SQL statements, especially when dealing with a large number of SQL statements.