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;
    }