<dependency>
? ? ?<groupId>com.github.jeffreyning</groupId>
? ? ?<artifactId>mybatisplus-plus</artifactId>
? ? ?<version>1.5.1-RELEASE</version>
</dependency>
<dependency>
? ? ?<groupId>com.baomidou</groupId>
? ? ?<artifactId>mybatis-plus-boot-starter</artifactId>
? ? ?<version>3.1.0</version>
?</dependency>
?<dependency>
? ? ?<groupId>com.baomidou</groupId>
? ? ?<artifactId>mybatis-plus-generator</artifactId>
? ? ?<version>3.1.0</version>
?</dependency>

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

? ? private static final long serialVersionUID=1L;

? ? @MppMultiId // 復合主鍵
? ? private String etlSystem;

? ? @MppMultiId // 復合主鍵
? ? private String etlJob;
}

public interface JobMapper extends MppBaseMapper<Job> {

}

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

?public interface JobService extends IMppService<Job> {
?}

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

jobService.saveOrUpdateByMultiId(job);