从对象的对象创建Json对象模板

Question

I have one JSON which looks something like this

{  
   "uniqueId":"junk",
   "buildingId":"123",
   "famousFor":[  
      {  
         "famousForId":"asd",
         "name":"Gaming",
         "activeState":true
      }
   ],
   "openHours":[  
      {  
         "day":"Sunday",
         "timingsFrom":{  
            "time":"11:00",
            "meridian":"AM"
         },
         "timingsTo":{  
            "time":"11:59",
            "meridian":"PM"
         }
      }
   ],
   "uploadedImages":{  
      "coverPhoto":[  
         {  
            "imageUrl":"http://google.com/images/a123a.png",
            "activeState":false
         }
      ],
      "profilePhoto":[  
         {  
            "imageUrl":"http://google.com/images/a123a.png, 
                        "            activeState":false
         }
      ]
   },
   "fDescriptions":[  
      {  
         "fMapUrl":"http://google.com/images/a123a.png",
         "tag":"1"
      }
   ],
   "Outlets":[  
      {  
         "outletName":"Halo",
         "floorNumber":1,
         "category":"Gaming"
      }
   ]
}

Now the thing is I have to create one GET API which essentially will provide me the same template with empty value. While returning the Object it's sending me the null value. How can I standardized the template that looks the same. My Object looks something like this.

public class EssentialDetails {

    @NotBlank(message=ApplicationUtil.MISSING_FIELD)
    @Valid
    @Pattern(regexp = "[0-9]+$",message="DP ID Must be Number")
    String dpId;
    @Id @NotBlank(message= ApplicationUtil.MISSING_FIELD)
    @Valid
    @Pattern(regexp = "[A-Za-z0-9]+$",message="Must Be Combination of Number and Letters")
    String tpId;
    @NotNull(message=ApplicationUtil.MISSING_FIELD)   @Valid
    List<FamousFor> famousFor;
    @NotNull(message=ApplicationUtil.MISSING_FIELD)  @Valid
    List<OpenHours> openHours;
    @NotNull(message=ApplicationUtil.MISSING_FIELD)  @Valid
    Pictures uploadedImages;
    @NotNull(message=ApplicationUtil.MISSING_FIELD) @Valid
    List<FloorDescription> floorDescriptions;
    @NotNull(message=ApplicationUtil.MISSING_FIELD)  @Valid
    List<Outlets> mallOutlets;

}

How can I pass the empty template with every field present within the template? I'm using java 8 and spring boot 2.0.6.

Answer 1

如果为空或为空，或者注释下方的某些有效值可以在模型的属性上方使用

@JsonInclude(ALWAYS)