MyBatis Plus配置日志CRUD的使用详解

#配置日志
mybatis-plus:
 configuration:
  log-impl: org.apache.ibatis.logging.stdout.StdOutImpl #仅控制台输出的日志

 //测试插入
  @Test
  public void testInsert(){
    Air air = new Air();
    air.setDistrictId(4);
    air.setLastModifyTime(new Date());
    air.setMonitoringStation("哈哈哈哈哈哈");
    air.setMonitorTime(new Date());
    air.setPm10(33);
    air.setPm25(65);
    airMapper.insert(air);
    System.out.println(air);
  }

//测试更新
  @Test
  public void testUpdate(){
    Air air = new Air();
    air.setId(9L);
    air.setDistrictId(4);
    air.setLastModifyTime(new Date());
    air.setMonitoringStation("哈");
    air.setMonitorTime(new Date());
    air.setPm10(33);
    air.setPm25(65);
    airMapper.updateById(air);
  }

public class Air {
 @TableId(type = IdType.ASSIGN_ID)
 private Long id;
 private long districtId;
 @TableField(fill = FieldFill.INSERT) //插入的时候更新插入时间
 private Date monitorTime;
 private long pm10;
 private long pm25;
 private String monitoringStation;
 @TableField(fill = FieldFill.INSERT_UPDATE) //更新和插入的时候都更新时间
 private Date lastModifyTime;
}

@Slf4j //抓取日志
@Component //SpringBoot的注解 ,一定不要忘了吧处理器加到IOC容器中
public class MyMetaObjectHandler implements MetaObjectHandler {

  @Override
  public void insertFill(MetaObject metaObject) {
    log.info("start insert fill");
//源码: setFieldValByName(String fieldName(字段名), Object fieldVal(字段值), MetaObject metaObjec(对象))
    this.setFieldValByName("monitor_time",new Date(),metaObject);
    this.setFieldValByName("last_modify_time",new Date(),metaObject);
  }

  @Override
  public void updateFill(MetaObject metaObject) {
    log.info("Start update fill....");
    this.setFieldValByName("last_modify_time",new Date(),metaObject);
  }
}