试试
String phone_number = request.getParameter("phone_number");
String password = request.getParameter("password");String[] charset = new String[]{"GB2312","GBK","UTF-8","ISO-8859-1"};
for(int i=0;i<charset.length; i++)
{
  System.out.println("charset=" + charset[i]);
  System.out.println(new String(phone_number.getBytes(charset[i])));
  System.out.println(new String(password.getBytes(charset[i])));
}如果你看到不是乱码的东东了,记得那个字符集,你发了