java 网络请求

String ret = null;try {URL url = new URL(requrl);HttpURLConnection httpConn = (HttpURLConnection) url.openConnection();httpConn.setConnectTimeout(30000);httpConn.setReadTimeout(30000);httpConn.setDoOutput(true);httpConn.setDoInput(true);httpConn.setRequestMethod("POST");DataOutputStream out = new DataOutputStream(httpConn.getOutputStream());out.write(paras.getBytes("UTF-8"));out.flush();out.close();InputStream stream = httpConn.getInputStream();DataInputStream in = new DataInputStream(stream);byte[] bin = null;byte[] inc = new byte[1024];int datelength = 0;int insize = 0;while ((insize = in.read(inc)) != -1) {int oldlength = datelength;datelength += insize;byte[] oldbin = new byte[datelength];for (int i = 0; i < oldlength; i++)oldbin[i] = bin[i];for (int i = oldlength; i < datelength; i++)oldbin[i] = inc[i - oldlength];bin = oldbin;}ret = new String(bin, "UTF8");in.close();System.out.println("ret is: " + ret);} catch (Exception ex) {ex.printStackTrace();}return ret;