servlet编码乱码问题

继承HttpServlet

重写doGet(HttpServletRequest req,HttpServletResponse resp),doPost()方法

post提交时：

 protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
         //post方法：告诉servlet如何去处理文字编码，输出
         response.setCharacterEncoding("utf-8");
         //告诉浏览器如何处理编码
         response.setContentType("text/html;charset=tf-8");
     }

Get方法

继承extends HttpServletRequestWrapper

重写getParameter（）方法

 @Override
     public String getParameter(String name) {
         String value=request.getParameter(name);
         String method=request.getMethod();
         if("get".equalsIgnoreCase(method)){
             try {
                 value=new String(value.getBytes("iso-8859-1"),"utf-8");
             } catch (Exception e) {
                 e.printStackTrace();
             }
         }
         return value;
     }