我尝试发送发布请求,但网络服务器返回我没有添加任何发布值。我花了很多时间试图解决这个问题,但没有结果。这是代码:
public static String post(String url, String postParams)
{
URLConnection connection = null;
try
{
connection = initializeConnection(url);
connection.setDoOutput(true);
((HttpURLConnection) connection).setRequestMethod("POST");
connection.setRequestProperty("Content-Type", "text/xml");
connection.setRequestProperty("Accept", "text/xml");
connection.setUseCaches(false);
connection.setDoInput(true);
DataOutputStream wr = new DataOutputStream(connection.getOutputStream());
wr.write(postParams.getBytes());
wr.flush();
wr.close();
// Get Response
InputStream is = connection.getInputStream();
return inputStreamToString(is);
}
catch (Exception e)
{
e.printStackTrace();
return null;
}
}
protected static HttpURLConnection initializeConnection(String stringUrl)
{
HttpURLConnection connection;
URL url = null;
try
{
url = new URL(stringUrl);
}
catch (MalformedURLException e1)
{
e1.printStackTrace();
}
try
{
connection = (HttpURLConnection) url.openConnection();
connection.setConnectTimeout(5000);
}
catch (Exception e)
{
e.printStackTrace();
return null;
}
return connection;
}
public static String inputStreamToString(InputStream is)
{
BufferedReader r = new BufferedReader(new InputStreamReader(is));
StringBuilder total = new StringBuilder();
String line;
try
{
while ((line = r.readLine()) != null)
{
total.append(line);
}
}
catch (IOException e)
{
e.printStackTrace();
}
return total.toString();
}
我从网络服务器收到一条消息,告诉我没有添加任何后值。据我从代码中了解,添加了值。我被困住了。