JSP Sevelet如何在控制台输出log?

直接使用System.out.println()

或者System.err.println() 就行

protectedvoid doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
        System.out.println("现在的时间是："+new Date());
        response.setContentType("text/html;charset=UTF-8");
        response.setCharacterEncoding("UTF-8");
        PrintWriter out = response.getWriter();
        String now = "现在的时间是：";
        now += new SimpleDateFormat("yyyy年MM月dd日 HH时mm分ss秒E").format(new Date());
        System.out.println(now);
        out.println(now);   //返回给客户端,println长的一样.
        out.flush();
    }

转载于:https://blog.51cto.com/laokaddk/1341310