将BufferedReader转换为JSONObject或Map

Question

我的代码向服务器发送GET请求,

    URL obj = new URL(url);
    HttpURLConnection con = (HttpURLConnection) obj.openConnection();
    con.setRequestMethod("GET");
    con.setRequestProperty("User-Agent", USER_AGENT); 
    BufferedReader in = new BufferedReader(new InputStreamReader(con.getInputStream()));

我得到一个打印的BufferedReader对象,

{  
   "status": "ERROR",    
   "errorCode": "MISSING_PARAMS",    
   "errorMessage": null,    
   "requestId": "20141014181739_11625805172",    
   "downstreamModuleErrorCode": null,    
   "object": [        
     "activity_code",        
     "activity_name",
     "points",
     "frequency",
     "strategy",
     "vsa_app_access_token"    
   ]
}

我想从中获取JSONOBject或Map.我尝试将其转换为String并对其进行操作.但这并不容易.请帮忙.

Answer 1

首先将其作为字符串.你可以使用自定义库

 String message = org.apache.commons.io.IOUtils.toString(rd);

或StringBuilder

    StringBuilder sb = new StringBuilder();

    String line;
    br = new BufferedReader(new InputStreamReader(is));
    while ((line = br.readLine()) != null) {
        sb.append(line);
    }

然后你可以解析它.因为它是一个对象,因为"{"(数组以[]开头和结尾),你需要创建一个JSONObject.

JSONObject json = new JSONObject(sb.toString());

然后你可以访问你的元素

//{ "status": "ERROR", "errorCode": "MISSING_PARAMS", "errorMessage": null, "requestId": "20141014181739_11625805172", "downstreamModuleErrorCode": null, "object": [ "activity_code", "activity_name", "points", "frequency", "strategy", "vsa_app_access_token" ]}

json.getString("status");

或者数组

JSONArray jsonArray = new JSONArray(json.getString("object"));

或者你使用方法getJSONArray()

JSONArray jsonArray = json.getJSONArray("object");

Answer 2

InputStream inputStream = connection.getInputStream();

BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream));
    StringBuilder builder = new StringBuilder();
    String line;
    while ((line = bufferedReader.readLine()) != null) {
        builder.append(line + "\n");
        }

JSONArray jsonArray = new JSONArray(builder.toString());
for (int i = 0; i < jsonArray.length(); i++) {
     JSONObject json = jsonArray.getJSONObject(i);

    if (!json.get("object").equals(null)) {
        JSONArray objectJsonArray = json.getJSONArray("object");
            for (int i = 0; i < objectJsonArray.length(); i++) {
                JSONObject json = objectJsonArray.getJSONObject(i);     
            }       
    }
}

希望能帮助到你。