public static String toUtf8String(String s) {

             StringBuffer sb = new StringBuffer();
             for (int i = 0; i < s.length(); i++) {
                 char c = s.charAt(i);
                 if (c >= 0 && c 150) {
                             // 根据request的locale 得出可能的编码
                             s = new String(s.getBytes("UTF-8"), "ISO8859-1");
                         }
                     }
                 }
             } catch (UnsupportedEncodingException e) {
                 e.printStackTrace();
             }
             return s;
         }