Java HttpURLConnection返回JSON [英] Java HttpURLConnection Returns JSON

问题描述

我正在尝试发出一个返回json响应的http get请求。我需要将json响应中的一些值存储在我的会话中。我有这个：

I'm trying to make a http get request which returns a json response. I need some of the values from the json response to be stored in my session. I have this:

public String getSessionKey(){
    BufferedReader rd  = null;
    StringBuilder sb = null;
    String line = null;
    try {
         URL url = new URL(//url here);
         HttpURLConnection connection = (HttpURLConnection) url.openConnection();
         connection.setRequestMethod("GET");
         connection.connect();
         rd  = new BufferedReader(new InputStreamReader(connection.getInputStream()));
          sb = new StringBuilder();

          while ((line = rd.readLine()) != null)
          {
              sb.append(line + '\n');
          }
          return sb.toString();

     } catch (MalformedURLException e) {
         e.printStackTrace();
     } catch (ProtocolException e) {
         e.printStackTrace();
     } catch (IOException e) {
         e.printStackTrace();
     }

    return "";
}

这将以字符串形式返回JSON：

This returns the JSON in a string:

{ "StatusCode": 0, "StatusInfo": "Processed and Logged OK", "CustomerName": "Mr API"}

我需要在会话中存储StatusCode和CustomerName。如何处理使用java返回JSON？

I need to store StatusCode and CustomerName in the session. How do I deal with returning JSON with java?

谢谢

推荐答案

您可以使用Gson。以下是帮助您的代码：

You can use Gson. Here is the code to help you:

Map<String, Object> jsonMap;  
Gson gson = new Gson();  
Type outputType = new TypeToken<Map<String, Object>>(){}.getType();  
jsonMap = gson.fromJson("here your string", outputType);

现在您知道如何从会议中获取并将其放入会议中。 您需要在类路径中包含Gson库。

Now you know how to get from and put those in session. You need to include Gson library in classpath.

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