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我想通過我的android應用程序發送HTTP POST請求到REST服務，並且客戶端作爲異步任務運行。這裏是客戶端：Android- org.apache.http.ProtocolException：服務器無法響應一個有效的HTTP響應
@Override
protected Void doInBackground(Void... params) {
String address = "http://xxx.xx.x.xxx:8080/rest/manageUser/create";
StringBuilder stringBuilder = null;
ArrayList<NameValuePair> postParameters;
try {
HttpPost httpPost = new HttpPost(address);
postParameters = new ArrayList<NameValuePair>();
postParameters.add(new BasicNameValuePair("userId", userId));
postParameters.add(new BasicNameValuePair("firstName", firstName));
postParameters.add(new BasicNameValuePair("lastName", lastName));
postParameters.add(new BasicNameValuePair("mobileNumber",
mobileNumber));
postParameters.add(new BasicNameValuePair("loginStatus",
loginStatus));
httpPost.setEntity(new UrlEncodedFormEntity(postParameters));
HttpClient client = new DefaultHttpClient();
HttpResponse response;
stringBuilder = new StringBuilder();
response = client.execute(httpPost);
HttpEntity entity = response.getEntity();
InputStream stream = entity.getContent();
int b;
while ((b = stream.read()) != -1) {
stringBuilder.append((char) b);
}
// System.out.println(stringBuilder);
} catch (Exception e) {
e.printStackTrace();
}
JSONObject jobj = null;
try {
jobj = new JSONObject(stringBuilder.toString());
System.out.println(jobj.toString());
} catch (Exception ex) {
ex.printStackTrace();
}
return null;
}
此外，當我創建客戶端作爲獨立的Java類它工作正常。但是，當我如上面用它從我的Android應用程序作爲一個異步任務，我得到以下異常：
at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:487)
at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:465)
at com.example.hello.service.client.CreateUser.doInBackground(CreateUser.java:64)
at com.example.hello.service.client.CreateUser.doInBackground(CreateUser.java:1)
at android.os.AsyncTask$2.call(AsyncTask.java:288)
at java.util.concurrent.FutureTask.run(FutureTask.java:237)
at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
at java.lang.Thread.run(Thread.java:841)
Caused by: org.apache.http.ProtocolException: The server failed to respond with a valid HTTP response
at org.apache.http.impl.conn.DefaultResponseParser.parseHead(DefaultResponseParser.java:93)
at org.apache.http.impl.io.AbstractMessageParser.parse(AbstractMessageParser.java:174)
at org.apache.http.impl.AbstractHttpClientConnection.receiveResponseHeader(AbstractHttpClientConnection.java:180)
at org.apache.http.impl.conn.DefaultClientConnection.receiveResponseHeader(DefaultClientConnection.java:235)
at org.apache.http.impl.conn.AbstractClientConnAdapter.receiveResponseHeader(AbstractClientConnAdapter.java:259)
at org.apache.http.protocol.HttpRequestExecutor.doReceiveResponse(HttpRequestExecutor.java:279)
at org.apache.http.protocol.HttpRequestExecutor.execute(HttpRequestExecutor.java:121)
at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:428)
at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:555)
... 10 more
org.json.JSONException: End of input at character 0 of
at org.json.JSONTokener.syntaxError(JSONTokener.java:450)
at org.json.JSONTokener.nextValue(JSONTokener.java:97)
at org.json.JSONObject.<init>(JSONObject.java:155)
at org.json.JSONObject.<init>(JSONObject.java:172)
at com.example.hello.service.client.CreateUser.doInBackground(CreateUser.java:82)
at com.example.hello.service.client.CreateUser.doInBackground(CreateUser.java:1)
at android.os.AsyncTask$2.call(AsyncTask.java:288)
at java.util.concurrent.FutureTask.run(FutureTask.java:237)
at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
at java.lang.Thread.run(Thread.java:841)
任何人都可以提出可能是什麼問題。同樣在我的休息服務中，我使用@FormParam接收數據。任何幫助，將不勝感激。