Java 如何接收json响应

我需要将响应转换为字符串

        HttpClient httpclient = new DefaultHttpClient();  
        Log.d("HTTP","Exe");
        String url=Sign(token);
        Log.d("HTTP","Exe");

        HttpPost httpPost;
        httpPost = new HttpPost(url);

响应（json）应该类似于

{
    "url": "http://db.tt/APqhX1",
    "expires": "Tue, 01 Jan 2030 00:00:00 +0000"
}

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我是如何收到它的？我正在使用Android（java）…

如果你用谷歌搜索并尝试一下，有很多例子：

      response = client.execute(httpPost);
  HttpEntity httpEntity = response.getEntity();
  InputStream is = httpEntity.getContent();

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。。将Inputstream转换为字符串这是获取任何json作为http响应的方法。我希望它会有用

HttpResponse response = httpclient.execute(httppost);
HttpEntity entity = response.getEntity();
InputStream is = entity.getContent();

try {
     BufferedReader reader = new BufferedReader(new InputStreamReader(is, "utf-8"), 256);
 StringBuilder sb = new StringBuilder();
 String line = null;
 while ((line = reader.readLine()) != null)  sb.append(line); 
     result = sb.toString();
 is.close();
} catch (Exception e) {}

 JSONArray jArray = new JSONArray(result);
 for(int i = 0; i < jArray.length(); i++) {
JSONObject json_data = jArray.getJSONObject(i);
String url= json_data.getString("url");
    String expires= json_data.getString("expires");
 }

HttpResponse response=httpclient.execute（httppost）；
HttpEntity=response.getEntity（）；
InputStream=entity.getContent（）；
试一试{
BufferedReader=新的BufferedReader（新的InputStreamReader（is，“utf-8”），256；
StringBuilder sb=新的StringBuilder（）；
字符串行=null；
而（（line=reader.readLine（））！=null）sb.append（line）；
结果=sb.toString（）；
is.close（）；
}捕获（例外e）{}
JSONArray jArray=新JSONArray（结果）；
for（int i=0；i