Android:Content has been consumed

如题所示：这个问题是在http请求后操作response产生的。

读取JSON

        /*** JSON返回常用String* * @param response* @return* @throws IllegalStateException* @throws IOException* @throws JSONException*/public static String getStringByJson(String field,HttpResponse response) throws IllegalStateException, IOException, JSONException{StringBuilder builder = new StringBuilder();BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(response.getEntity().getContent()));String s = null;while ((s = bufferedReader.readLine()) != null){builder.append(s);}JSONObject jsonDataInfo = new JSONObject(builder.toString());return jsonDataInfo.getString(field);}/*** JSON返回常用int* * @param response* @return* @throws IllegalStateException* @throws IOException* @throws JSONException*/public static int getIntByJson(String field,HttpResponse response) throws IllegalStateException, IOException, JSONException{StringBuilder builder = new StringBuilder();BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(response.getEntity().getContent()));String s = null;while ((s = bufferedReader.readLine()) != null){builder.append(s);}JSONObject jsonDataInfo = new JSONObject(builder.toString());return jsonDataInfo.getInt(field);}/*** 获取钻井任务封装model对象集合* * @param response* @param clazz* @return* @throws IllegalStateException* @throws IOException* @throws JSONException  */@SuppressWarnings({ "unchecked", "rawtypes" })public static SchedulerModel getSchedulerModelByJson(String field,HttpResponse response, Class clazz) throws IllegalStateException, IOException, JSONException{String resultString=StringUtil.getStringByJson(field, response);ObjectMapper om = new ObjectMapper();SimpleDateFormat myDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");om.getSerializationConfig().setDateFormat(myDateFormat);return om.readValue(resultString, clazz);}

JSON转对象

 try{// 设置请求参数项request.setEntity(new UrlEncodedFormEntity(params, HTTP.UTF_8));HttpClient client = HttpClientUtil.getInstance();// 执行请求返回相应HttpResponse response = client.execute(request);if (response.getStatusLine().getStatusCode() == 200){schedulerModel=StringUtil.getSchedulerModelByJson("model", response, SchedulerModel.class);if (schedulerModel!=null){Log.d("log", ">>>>执行 方法addToServer(Scheduler scheduler) ,id=" + schedulerModel.getId());}} else{Log.d("log", ">>>>connectionError");}} catch (Exception e){Log.d("log", ">>>>connectionError" + e.getMessage());// e.printStackTrace();Log.d("log", ">>>>执行 方法addToServer(Scheduler scheduler) ,出错。" + e.getMessage());}

异常分析

如果在调用

StringUtil.getSchedulerModelByJson("model", response, SchedulerModel.class);

之前或者之后调用，有使用到response，只要调用了一次

BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(response.getEntity().getContent()));

那么，都将会返回： Content has been consumed异常，因为content读取之后就被销毁了。

代码提升

如果要实现多次读取就只有将content内容保存在一个临时对象上，如StringBuilder

/*** 获取返回值内容* @param response* @return* @throws IOException*/public static StringBuilder getStringBuilder(HttpResponse response) throws IOException{StringBuilder builder = new StringBuilder();BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(response.getEntity().getContent(),HTTP.UTF_8));String s = null;while ((s = bufferedReader.readLine()) != null){builder.append(s);}return builder;}

以后获取JSON数据的时候就方便多了，代码如下：

 /*** JSON返回常用String* * @param response* @return* @throws IllegalStateException* @throws IOException* @throws JSONException*/public static String getStringByJson(String field,StringBuilder builder) throws IllegalStateException, IOException, JSONException{     JSONObject jsonDataInfo = new JSONObject(builder.toString());return jsonDataInfo.getString(field);}/*** JSON返回常用int* * @param response* @return* @throws IllegalStateException* @throws IOException* @throws JSONException*/public static int getIntByJson(String field,StringBuilder builder) throws IllegalStateException, IOException, JSONException{JSONObject jsonDataInfo = new JSONObject(builder.toString());return jsonDataInfo.getInt(field);}

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Android:Content has been consumed

读取JSON

JSON转对象

异常分析

代码提升

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