In-depth analysis of MyBatis batch insert operation

MyBatis is a popular Java persistence layer framework that has good flexibility and scalability in database operations. In actual development, we often encounter the need to add data in batches. This article will introduce in detail how to perform batch adding operations in MyBatis and provide specific code examples.

1. Overview of batch add operation

Batch add operation refers to the operation of inserting multiple pieces of data into the database at one time. Compared with single insertion, batch addition can effectively reduce the number of interactions with the database and improve the efficiency of data insertion.

In MyBatis, there are many ways to add data in batches. The more commonly used one is to use the foreach tag combined with the insert statement to insert data in batches. A specific example will be used to illustrate this step in detail below.

2. Batch add operation example

Suppose we have a student entity classStudent, including the student's name and age fields. We need to add multiple student information to the database in batches.

First, define the corresponding entity class Student:

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

    // 省略getter和setter方法
}

Then, write the MyBatis Mapper XML file StudentMapper.xml and define it in it SQL statement to add student data in batches:

<!-- StudentMapper.xml -->

<mapper namespace="com.example.mapper.StudentMapper">

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

</mapper>

In the above example, we used the foreach tag to traverse the incoming student list and generate the corresponding insertion value.

Next, define the method of batch inserting data in the corresponding Mapper interface StudentMapper:

public interface StudentMapper {

    void batchInsert(List<Student> students);

}

Finally, call batchInsert in the Service layer or other business logic layer Method, pass in the student list to implement batch insertion operations.

@Service
public class StudentService {

    @Autowired
    private StudentMapper studentMapper;

    public void batchInsertStudents(List<Student> students) {
        studentMapper.batchInsert(students);
    }
}

3. Summary

Through the above examples, we introduced in detail the steps to add data in batches in MyBatis and provided specific code examples. Batch add operations can significantly improve the efficiency of data insertion, which is especially important for scenarios that require frequent insertion of large amounts of data. I hope this article can help developers who are interested in MyBatis batch addition operations.

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