public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        response.setCharacterEncoding("utf-8");
        String token ;
        token=request.getHeader("token");
        System.out.println("當前用戶請求頭為:"+token);

        String requestURI = request.getRequestURI();
        Enumeration<String> em = request.getParameterNames();
 


        System.out.println("current request meth:"+requestURI);
        boolean b = em.hasMoreElements();
        if(b){
            String name =  em.nextElement();
            String value = request.getParameter(name);
            System.out.println("form表單請求的參數名稱:"+name+"請求的參數值："+value);
        }


        BufferedReader br = request.getReader();
 

        String str, wholeStr = "";
        while((str = br.readLine()) != null){
            wholeStr += str;
        }
        System.out.println("body--Json中請求的參數名稱:"+wholeStr);

    }

requesth獲取參數