Question

{
  "buildingNumber": 123,
  "apatmentNumber": "4567",
  "apartments": "123",
  "isActive": true,
  "possibleActions": [
    "ENTER",
    "EXIT"
  ],
  "enterVia": {
    "J1-B1": [
      "DEFAULT_ROUTE"
    ],
    "A1-D1": [
      "DEFAULT_ROUTE"
    ]
    },
  "SectionMap": {},
  "route": "abc|def (via xyz)"
  }

我有以上示例JSON。 “enterVia”中的整个内容是动态的。我必须从响应中读取这个嵌套的Json（如下所示）并在另一个请求中发送它。

  {
    "J1-B1": [
      "DEFAULT_ROUTE"
    ],
    "A1-D1": [
      "DEFAULT_ROUTE"
    ]
}

如果可以使用Gson，ObjectMapper，请建议一种方式。

Answer 1

我找到了一个使用ObjectMapper的解决方案。以下是代码：

import java.io.IOException;
import java.util.List;
import java.util.Map;
import com.fasterxml.jackson.core.JsonParseException;
import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.core.type.TypeReference;
import com.fasterxml.jackson.databind.JsonMappingException;
import com.fasterxml.jackson.databind.ObjectMapper;

public class JsonParseTest {

    public static void main(String[] args) {

        String json = "{\r\n\t\"J1-B1\": [\r\n\t\t\"DEFAULT_ROUTE\"\r\n\t],\r\n\t\"A1-D1\": [\r\n\t\t\"DEFAULT_ROUTE\"\r\n\t]\r\n}";

        ObjectMapper objectMapper = new ObjectMapper();
        Map<String, List<String>> routesMap = null;
        try {
            routesMap = objectMapper.readValue(json, new TypeReference<Map<String, List<String>>>(){});
        } catch (JsonParseException e1) {
            // TODO Auto-generated catch block
            e1.printStackTrace();
        } catch (JsonMappingException e1) {
            // TODO Auto-generated catch block
            e1.printStackTrace();
        } catch (IOException e1) {
            // TODO Auto-generated catch block
            e1.printStackTrace();
        }
        System.out.println("read response output: " +routesMap);


        objectMapper.configure(JsonParser.Feature.ALLOW_UNQUOTED_FIELD_NAMES, true);
        String jsonRequest = null;

        try {
            jsonRequest = objectMapper.writeValueAsString(routesMap);
        } catch (JsonProcessingException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

        System.out.println("next request output: " +jsonRequest);
    }

}

计划的输出：

读取响应输出：{J1-B1 = [DEFAULT_ROUTE]，A1-D1 = [DEFAULT_ROUTE]}

下一个请求输出：{＆＃34; J1-B1＆＃34;：[＆＃34; DEFAULT_ROUTE＆＃34;]，＆＃34; A1-D1＆＃34;：[＆＃34; DEFAULT_ROUTE＆＃34; ]}

解析动态键和值嵌套json

1 个答案: