servlet出现乱码改了也不行！！
protected void processRequest(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        response.setContentType("text/html;charset=GB2312");
        request.setCharacterEncoding("gb2312");
        PrintWriter out = response.getWriter();
加上这两行也不行啊，为什么呢？？
怎么改呀