MyBatis XML映射文件中的批量插入和更新方式

<insert id="insertDuplicateKeyUpdateStudent">
    INSERT INTO
    student(id, name, age, class, email)
    VALUES
    <foreach collection="students" item="student" separator=",">
        (
        #{student.id},
        #{student.name},
        #{student.age},
        #{student.class},
        #{student.email}
        )
    </foreach>
    ON DUPLICATE KEY UPDATE
    <trim prefix="" suffixOverrides=",">
        <foreach collection="students" separator="," item="student">
            <if test="student.name != null and student.name != ''">
                name = VALUES(name),
            </if>
            <if test="student.age != null">
                age = VALUES(age),
            </if>
            <if test="student.class != null and student.class != ''">
                class = VALUES(class),
            </if>
            <if test="student.email != null and student.email != ''">
                email = VALUES(email)
            </if>
        </foreach>
    </trim>
</insert>

public interface StudentMapper {
    int insertDuplicateKeyUpdateStudent(List<Student> students);
}

@Autowired
private StudentMapper studentMapper;

public void batchInsertOrUpdateStudents(List<Student> students) {
    studentMapper.insertDuplicateKeyUpdateStudent(students);
}