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如何在java中解析json（34个答案）
一年前关门了。
我正在使用json解析器对象解析json文件。我无法访问请求结构及其内部正文内容。我写过这样的代码：

private static final String filePath = "D:\\score_api.json";

public static void main(String[] args) throws FileNotFoundException, IOException, ParseException {

            FileReader reader = new FileReader(filePath);

            JSONParser jsonParser = new JSONParser();
            JSONObject jsonObject = (JSONObject) jsonParser.parse(reader);

            System.out.println("++++++++++++++++++\n"+jsonObject);
            // prints the whole json content. success!

            JSONObject structure = (JSONObject) jsonObject.get("provider");
            System.out.println("provider name: " + structure.get("name"));
            // prints the provider name. success!

            JSONArray req= (JSONArray) jsonObject.get("interactions");
            Iterator i = req.iterator();

           while (i.hasNext()) {
                JSONObject reqObj = (JSONObject) i.next();
                System.out.println("description: " + reqObj.get("description") +"\n");
                System.out.println("request body: " + reqObj.get("request")); // prints full request body 
                System.out.println("path: " + reqObj.get("path") +"\n"); // Failing, getting null value.
                System.out.println("reponse body: " + reqObj.get("response") +"\n"); // Success
           }
        }

它的输出：
++++++++++++++++++{“完整json文件内容打印”}
提供者名称：sis描述：api post score请求主体：{“完整请求主体打印”}路径：null响应主体：{“状态”：200}
我正在努力访问请求正文内容。以及它的孩子部分。我想访问“path”的值和其他内部值，如“adptpolval”、“eecoid”和源结构。
我是一个java新手，我尝试过但失败了。任何帮助都将不胜感激！提前谢谢！
这是我的json文件内容。。。

{
  "consumer": {
    "name": "Consumer1"
  },
  "provider": {
    "name": "provider_a"
  },
  "interactions": [
    {
      "description": "API Score",
      "providerStates": [
        {
          "name": "",
          "params": {}
        }
      ],
      "request": {
        "method": "post",
        "path": "Z123MI6/services/score",
        "headers": {
          "content-type": "application/json"
        },
        "body": {
          "adptPolVal": true,
          "datapoints": [
            {
              "dataId": " data.point.id ",
              "source": {
                "srcType": "sourceType.dev.admin",
                "snum": "12345",
                "instId": "intance id",
                "contId": "container id",
                "appId": "com.consumer."
              },
              "userId": "userId",
              "ts": 1234567891011,
              "lt": 11.12345,
              "lng": 123.456,
              "ipId": "192.168.1.1",
              "geoGraph": ""
            }
          ],
          "eEcoId": "ecoId"
        }
      },
      "response": {
        "status": 200
      }
    }
  ]
}