HttpServletResponse 响应中文乱码问题

private void doGet(HttpServletRequest request,HttpServletResponse response) throws IOException {
    System.out.println("do get ...");

    /**
     * 解决响应中文乱码方案一（不推荐使用）
     *
     */
    //设置服务器字符集为UTF-8
    //response.setCharacterEncoding("UTF-8");
    //设置响应头，设置浏览器也使用 UTF-8 字符集
    //response.setHeader("Content-Type","text/html;charset=UTF-8");

    /**
     * 解决响应中文乱码方案二（推荐使用）
     *
     */
    //它会同时设置服务器和客户端都使用 UTF-8 字符集，还设置了响应头
    //此方法一定要在获取流对象之前调用才有效
    response.setContentType("text/html;charset=UTF-8");

    PrintWriter writer = response.getWriter();
    writer.write("中国你好！");

}

private void doPost(HttpServletRequest request,HttpServletResponse response) throws IOException {
    System.out.println("do post ...");
    PrintWriter writer = response.getWriter();
    writer.write("do post ...");
}