您好我正在尝试通过在我的应用程序中调用HttpPost从服务器获取数据，它之前工作正常，但现在它无法正常工作（我没有对代码进行任何更改）并且给予＆＃ 34; org.apache.http.client.ClientProtocolException＆＃34;错误。
我不知道会出现什么问题，但在收到错误后我在google上搜索并执行了一些额外的行，如下所示，但仍未得到响应同样的错误。
public static String postRequest(String url, List<NameValuePair> data) {
String result = "";
try {
HttpPost httpPost = new HttpPost(url);
httpPost.setEntity(new UrlEncodedFormEntity(data));
StringEntity se = new StringEntity(HTTP.UTF_8);
se.setContentType("text/xml");
httpPost.setEntity(se);
HttpParams httpParameters = new BasicHttpParams();
int timeoutConnection = 10000;
HttpConnectionParams.setConnectionTimeout(httpParameters,
timeoutConnection);
int timeoutSocket = 10000;
HttpConnectionParams.setSoTimeout(httpParameters, timeoutSocket);
DefaultHttpClient httpClient = new DefaultHttpClient(httpParameters);
BasicHttpResponse httpResponse = (BasicHttpResponse) httpClient
.execute(httpPost);
HttpEntity entity = httpResponse.getEntity();
if (entity != null) {
result = EntityUtils.toString(entity);
result = result.trim();
}
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (ParseException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch (Exception e) {
return "-333" + e.toString();
}
return result;
}
它给了我以下错误：
03-19 19:10:17.852: W/System.err(21707): org.apache.http.client.ClientProtocolException
03-19 19:10:17.877: W/System.err(21707): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:750)
03-19 19:10:17.877: W/System.err(21707): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:519)
03-19 19:10:17.882: W/System.err(21707): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:497)
03-19 19:10:17.882: W/System.err(21707): at com.example.asyntasks.Utility.postRequest(Utility.java:284)
03-19 19:10:17.882: W/System.err(21707): at com.example.asyntasks.GetHomeItemsTask.getHomeRecipe(GetHomeItemsTask.java:88)
03-19 19:10:17.882: W/System.err(21707): at com.example.asyntasks.GetHomeItemsTask.doInBackground(GetHomeItemsTask.java:54)
03-19 19:10:17.882: W/System.err(21707): at com.example.asyntasks.GetHomeItemsTask.doInBackground(GetHomeItemsTask.java:1)
03-19 19:10:17.882: W/System.err(21707): at android.os.AsyncTask$2.call(AsyncTask.java:287)
03-19 19:10:17.882: W/System.err(21707): at java.util.concurrent.FutureTask.run(FutureTask.java:234)
03-19 19:10:17.882: W/System.err(21707): at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230)
03-19 19:10:17.887: W/System.err(21707): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1080)
03-19 19:10:17.887: W/System.err(21707): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:573)
03-19 19:10:17.887: W/System.err(21707): at java.lang.Thread.run(Thread.java:864)
03-19 19:10:17.887: W/System.err(21707): Caused by: org.apache.http.client.CircularRedirectException: Circular redirect to 'http://www.example.com/'
03-19 19:10:17.887: W/System.err(21707): at org.apache.http.impl.client.DefaultRedirectHandler.getLocationURI(DefaultRedirectHandler.java:173)
03-19 19:10:17.887: W/System.err(21707): at org.apache.http.impl.client.DefaultRequestDirector.handleResponse(DefaultRequestDirector.java:932)
03-19 19:10:17.892: W/System.err(21707): at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:483)
03-19 19:10:17.892: W/System.err(21707): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:748)
03-19 19:10:17.892: W/System.err(21707): ... 12 more
03-19 19:10:17.902: W/System.err(21707): org.json.JSONException: End of input at character 0 of
03-19 19:10:17.902: W/System.err(21707): at org.json.JSONTokener.syntaxError(JSONTokener.java:450)
03-19 19:10:17.902: W/System.err(21707): at org.json.JSONTokener.nextValue(JSONTokener.java:97)
03-19 19:10:17.907: W/System.err(21707): at org.json.JSONObject.<init>(JSONObject.java:154)
03-19 19:10:17.907: W/System.err(21707): at org.json.JSONObject.<init>(JSONObject.java:171)
03-19 19:10:17.907: W/System.err(21707): at com.example.asyntasks.GetHomeItemsTask.getHomeRecipe(GetHomeItemsTask.java:90)
03-19 19:10:17.907: W/System.err(21707): at com.example.asyntasks.GetHomeItemsTask.doInBackground(GetHomeItemsTask.java:54)
03-19 19:10:17.907: W/System.err(21707): at com.example.asyntasks.GetHomeItemsTask.doInBackground(GetHomeItemsTask.java:1)
03-19 19:10:17.907: W/System.err(21707): at android.os.AsyncTask$2.call(AsyncTask.java:287)
03-19 19:10:17.907: W/System.err(21707): at java.util.concurrent.FutureTask.run(FutureTask.java:234)
03-19 19:10:17.907: W/System.err(21707): at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230)
03-19 19:10:17.907: W/System.err(21707): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1080)
03-19 19:10:17.927: W/System.err(21707): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:573)
03-19 19:10:17.927: W/System.err(21707): at java.lang.Thread.run(Thread.java:864)
请帮帮我。