给你一个成员函数:
/**** 字符集的转换函数 ****/
        // added by baiqing 2003.02.18
        public static String charConvert(String strSource){
            if (strSource == null){
                return "";
            }
            else{
                try{
                  //return new String(strSource.getBytes("GB2312"), "GBK");
                  String str = new String(strSource.getBytes("GBK"), "GB2312");
                  System.out.println(str);
                  return str;
                }
                catch (Exception ex){
                  System.out.println(ex.toString());
                  return "";
                }
            }
        }