示例：Servlet显示当前系统时间（时间格式化）

 1 package com.mhb;
 2 
 3 import java.io.IOException;
 4 import java.io.PrintWriter;
 5 import java.text.SimpleDateFormat;
 6 import java.util.*;
 7 
 8 import javax.servlet.ServletContext;
 9 import javax.servlet.ServletException;
10 import javax.servlet.http.HttpServlet;
11 import javax.servlet.http.HttpServletRequest;
12 import javax.servlet.http.HttpServletResponse;
13 
14 public class TimeServlet extends HttpServlet {
15 
16 public void init() throws ServletException {
17 }
18 
19 public void doGet(HttpServletRequest request, HttpServletResponse response)
20 throws ServletException, IOException {
21 response.setContentType("text/html;charset=utf-8");
22 PrintWriter out = response.getWriter();
23 Date nowDate = new Date(System.currentTimeMillis());
24 SimpleDateFormat time = new SimpleDateFormat("yyyy年MM月dd日-HH时mm分ss秒");
25 out.print("当前系统时间为："+ time.format(nowDate));
26 }
27 
28 public void doPost(HttpServletRequest request, HttpServletResponse response)
29 throws ServletException, IOException {
30 }
31 
32 public void destroy() {
33 super.destroy(); 
34 }
35 }