从HttpServletRequest request, 中读取数据流中的内容

  BufferedReader in=new BufferedReader(new InputStreamReader(request.getInputStream()));
  StringBuilder sb = new StringBuilder();   
       String xmlHead = "";
        String xmlContent="";
        String line = null;  
        while ((line = in.readLine()) != null) {   
        sb.append(line);   

           }  从@Context HttpServletRequest request, 中读取数据流中的内容