如何从RestTemplate交换方法获取特定对象? [英] How to get specific object from RestTemplate exchange method?

问题描述

我有一个端点，它向我返回此响应:

I have an end-point which returns me this response:

{
  "head": {
    "status": 200,
    "ok": true,
    "messages": [],
    "errors": [],
    "references": {}
  },
  "body": {
    "id": "d57a9c7aef9842c2e31a0f49c",
    "flowId": "f57979d06f9842c3e94f1f197",
    "creationDate": 1470744494732,
    "path": "/luafanti/test",
    "version": 0,
    "elems": {
      "xxx": {
        "type": "integer",
        "value": 200
      }
    }
  }
}

我的问题是，如何制作一个只能用我的json响应的一部分填充的模型.例如，使用此:

My question is, how to make a model that can be populated with only a part of my json response. For example, with this:

 "xxx": {
            "type": "integer",
            "value": 200
        }

或者这个:

"elems": {
          "xxx": {
            "type": "integer",
            "value": 200
          }
        }

推荐答案

使用Jackson，您可以将模型定义如下:

Using Jackson, you can define your model as the following:

@JsonIgnoreProperties(ignoreUnknown=true)
public class MyResponseModel {
  private Body body;

  public void setBody(Body body) {this.body = body;}
  public Body getBody() {return body;}

  @JsonIgnoreProperties(ignoreUnknown=true)
  public static class Body {
    private Elems elems;
    // getter and setter for elems 
  }

  @JsonIgnoreProperties(ignoreUnknown=true)
  public static class Elems {
    private Xxx xxx;
    // getter and setter for xxx 
  }

  @JsonIgnoreProperties(ignoreUnknown=true)
  public static class Xxx {
    private String type;
    private String value;

    // getter and setter for type and value 
  }
}

以上内容非常冗长，特别是如果您仅对响应的一小部分感兴趣时.将响应作为字符串处理然后使用例如 JsonPath 仅提取您感兴趣的数据.

The above is quite verbose, particularly if you are only interested in a very small part of the response. It may be more practical to handle the response as a String and then use e.g. JsonPath to extract only the data you are interested in.

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