网页显示乱码问题

 @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        
        resp.setContentType("text/html;charset=UTF-8");
        PrintWriter out =resp.getWriter();
        out.println("<strong>post方式提交请求</strong><br>");
    }

 

设置字符编码格式应该，在out对象定义之前，否则对该out对象无效.