mybatisPlus 联合主键 批量修改

            com.github.jeffreyning
            mybatisplus-plus
            1.5.1-RELEASE
        

        
            com.baomidou
            mybatis-plus-boot-starter
        

@SpringBootApplication
@EnableMPP
public class SystemApplication {
    public static void main(String[] args) {
        SpringApplication.run(SystemApplication.class, args);
    }
}

    @MppMultiId
    @TableField(value = "message_id")
    @ApiModelProperty(value = "消息id")
    private Long messageId;

    @MppMultiId
    @TableField(value = "user_id")
    @ApiModelProperty(value = "用户id")
    private Long userId;

public interface SysMessageUserMapper extends MppbaseMapper{
}

public interface SysMessageUserService extends IMppService {
}

@Service
public class SysMessageUserServiceImpl extends MppServiceImpl implements SysMessageUserService {
}

//批量修改方法
sysMessageUserService.updateBatchByMultiId(updateList);