Introducing the method of implementing batch insertion operations in MyBatis

MyBatis is an excellent persistence layer framework that is widely used in Java projects. In actual development, sometimes it is necessary to batch add operations to the database. This article will introduce how to use MyBatis to implement batch addition operations and provide specific code examples.

1. Create entity class

First we need to create the corresponding entity class to map the fields of the database table. Suppose we have a user class User, including id, name and age fields, which can be defined as follows:

public class User {
    private Long id;
    private String name;
    private Integer age;

    // 省略getter和setter方法
}

2. Write the Mapper interface and Mapper XML file

Next, we need to write the corresponding Mapper interface and Mapper XML file are used to define SQL statements and mapping relationships. We can add a method to add users in batches in the Mapper interface:

public interface UserMapper {
    void batchInsert(@Param("users") List<User> users);
}

In the corresponding Mapper XML file, write the SQL statement:

<mapper namespace="com.example.UserMapper">
    <insert id="batchInsert" parameterType="java.util.List">
        insert into user (name, age) values
        <foreach collection="users" item="user" separator="," >
            (#{user.name}, #{user.age})
        </foreach>
    </insert>
</mapper>

3. Write the Service layer code

In the Service layer, we can call the batch add method defined in the Mapper interface:

@Service
public class UserService {
    @Autowired
    private UserMapper userMapper;

    public void batchInsert(List<User> users) {
        userMapper.batchInsert(users);
    }
}

4. Call the Service layer method

Finally, where batch add operations are required, we can Call the Service layer method to implement batch addition:

@Service
public class UserController {
    @Autowired
    private UserService userService;

    public void batchAddUsers() {
        List<User> users = new ArrayList<>();
        // 构造用户数据
        for (int i = 0; i < 10; i++) {
            User user = new User();
            user.setName("User" + i);
            user.setAge(20 + i);
            users.add(user);
        }

        userService.batchInsert(users);
    }
}

Through the above steps, we successfully implemented the method of using MyBatis for batch addition operations. In actual projects, batch addition operations can effectively improve the performance of database operations, especially when the amount of data is large. Hope this article helps you!

The above is the detailed content of Introducing the method of implementing batch insertion operations in MyBatis. For more information, please follow other related articles on the PHP Chinese website!