将对象放入 Jackson 的 ObjectNode 中

Question

我正在尝试在 Jackson 的 ObjectNode 中设置一个 Object，我能够做到这一点，但是我在将其设置为对象节点时遇到了问题。 null 属性也来了，我试过使用 GSON，但请求中出现了 " \"。

public class Testing4 {
        public static void main(String[] args) throws JsonProcessingException {
        
            ObjectNode request = null;
            ObjectMapper mapper = new ObjectMapper();
            request = mapper.createObjectNode();
            
                    
            RequestParam requestParam  = new RequestParam();
            requestParam.setCustomerName("sachin");
            requestParam.setCustomerOrderNumber("12344556");
            
            request.set("request",mapper.convertValue(requestParam, JsonNode.class));
            request.put("FatherName","jithin");
            
            String req = mapper.createObjectNode().set("request", request).toString();
            System.out.println(req);
            
            
            
        }

        private static Comparator<? super String> kFirst() {
          return (s1, s2) -> "k".equals(s1) ? -1 : "k".equals(s2) ? 1 : 0;
        
}
}

DTO class

public class RequestParam implements Serializable {
    

        /**
     * 
     */
    private static final long serialVersionUID = 1L;
        private String orderDueDate;
        private String originatingSystemOrderId;
        private String objectId;
        private String taskTypeId;
        private String customerId;
        private String customerName;
        private String customerOrderNumber;
        private Dataset dataset;


}

在这里我可以获得 o/p 但 o/p 包含 null 分配以及我将如何删除 null 分配 o/p 我现在

{
  "request": {
    "request": {
      "orderDueDate": null,
      "originatingSystemOrderId": null,
      "objectId": null,
      "taskTypeId": null,
      "customerId": null,
      "customerName": "sachin",
      "customerOrderNumber": "12344556",
      "dataset": null
    },
    "FatherName": "jithin"
  }
}

我想要的o/p

{
  "request": {
    "request": {
      "customerName": "sachin",
      "customerOrderNumber": "12344556"
    },
    "FatherName": "jithin"
  }
}

请帮忙，谢谢

Answer 1

@JsonInclude(Include.NON_NULL)
public class RequestParam implements Serializable {
    
    private static final long serialVersionUID = 1L;
        private String orderDueDate;
        private String originatingSystemOrderId;
        private String objectId;
        private String taskTypeId;
        private String customerId;
        private String customerName;
        private String customerOrderNumber;
        private Dataset dataset;


}

您需要添加导入语句 - import com.fasterxml.jackson.annotation.JsonInclude;

在DTOclass定义前添加@JsonInclude(Include.NON_NULL)

Answer 2

of @JsonInclude(Include.NON_NULL) 不起作用然后使用

 @JsonInclude(JsonInclude.Include.NON_NULL)

(@JsonSerialize(include = Inclusion.NON_NULL) 不要使用它，它已被弃用） @JsonInclude(JsonInclude.Include.NON_NULL) public class RequestParam 实现 Serializable {

    private static final long serialVersionUID = 1L;
        private String orderDueDate;
        private String originatingSystemOrderId;
        private String objectId;
        private String taskTypeId;
        private String customerId;
        private String customerName;
        private String customerOrderNumber;
        private Dataset dataset;


}

将对象放入 Jackson 的 ObjectNode 中

to put an object in a ObjectNode of Jackson

java

json

jackson

gson

java-8