使用HttpURLConnection将字符流发送到servlet

使用HttpURLConnection将字符流发送到servlet
此功能将字符串以流的形式发送给一个servlet.(ps:可用于ajax跨域访问)

代码如下:

java 代码

public String postStringToUrl(String Str, String urlStr){
  BufferedWriter bWriter = null;
  HttpURLConnection urlConn = null;
  String message = Str;
  String target = urlStr;
  String sCurrentLine = "";
  String sTotalString = "";
  int res = 0;
  try{
   byte[] byteBuffer = message.getBytes("GB2312");
   URL httpurl = new URL(target);
   urlConn = (HttpURLConnection)httpurl.openConnection();
   urlConn.setRequestProperty("Content-Type","application/octet-stream");
   urlConn.setRequestProperty("Content-length", "" + byteBuffer.length);
   urlConn.setRequestProperty("pure-data", "yes");
   urlConn.setRequestProperty("Connection","Keep-Alive");

   urlConn.setDoOutput(true);
   OutputStream out = urlConn.getOutputStream();

   try{
    out.write(byteBuffer);
   }
   finally{
    out.flush();
    out.close();
    message = null;
    target = null;
   }
    //url请求返回code值
   res = urlConn.getResponseCode();
   if (res == 200) {
    java.io.InputStream is = urlConn.getInputStream();
    BufferedReader reader = new BufferedReader(
      new InputStreamReader(is));
    while ((sCurrentLine = reader.readLine()) != null)
     if (sCurrentLine.length() > 0)
      sTotalString = sTotalString + sCurrentLine.trim();
    String tmpStr = new String(sTotalString.getBytes("GB2312"));
    sTotalString = tmpStr;
   } else {
    sTotalString = "远程服务器连接失败,错误代码:"+res;

   }

   if (bWriter != null)
    bWriter.close();

  }
  catch(Exception e){
   sTotalString = "连接服务器失败.";
   e.printStackTrace();
  }
  return sTotalString;
 }