ServletResponse

    public void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        
        //response的outputStream输出数据的问题
        //方法一：程序以什么码表输出，一定要控制浏览器以什么码表打开
        String date="中国";
        OutputStream out=response.getOutputStream();
        //方法二：<meta>标签模拟一个http响应头
        out.write("<meta http-equiv=‘content-type‘ content=‘text/html;charset=UTF-8‘>".getBytes());
        out.write(date.getBytes("UTF-8"));
        
    }

    public void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        //设置response类使用的码表，以控制response以什么码表向浏览器写出数据
        response.setCharacterEncoding("UTF-8");
        //指定浏览器以什么码表打开服务器发送的数据
        response.setHeader("content-type", "text/html;charset=UTF-8");
        String date="中国";
        PrintWriter out=response.getWriter();
        out.write(date);
    
    }

response.setContentType("text/html;charset=UTF-8");