mybatis-plus联合主键的使用

1、依赖mybatis-plus

<dependency>
    <groupId>com.github.jeffreyning</groupId>
    <artifactId>mybatisplus-plus</artifactId>
    <version>1.5.1-RELEASE</version>
</dependency>
 

2、实体类，联合主键字段上使用@MppMultiId注解

@TableName("etl_job")
public class Job implements Serializable {

    private static final long serialVersionUID=1L;

    @MppMultiId // 复合主键
    private String etlSystem;

    @MppMultiId // 复合主键
    private String etlJob;
}

3.Mapper类，继承MppBaseMapper

public interface JobMapper extends MppBaseMapper<Job> { }

4、mapper.xml

<resultMap id="BaseResultMap" type="com.dd.study.beans.Job">
        <id column="etl_system" property="etlSystem" />
        <id column="etl_job" property="etlJob" />
 </resultMap>
 

6.Service

public interface JobService extends IMppService<Job> { }

7、ServiceImpl

@Service public class JobServiceImpl extends MppServiceImpl<JobMapper, Job> implements JobService { }

8、应用复合主键相关的操作

jobService.saveOrUpdateByMultiId(job);

9、在启动类加上@EnableMPP