有一个定时器 需要每天定时访问该项目的一个链接，从而实现发送邮件提醒的功能 ，
但是不能new一个 HttpServletRequest new一个之后定时器失效， init方法中需要获得URL， 下面是代码 你懂的。
package com.lawstar.mod.timer.serv;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.lawstar.mod.timer.timers.AlarmClock;
import com.lawstar.mod.timer.timers.LoadTimerConfig;
import com.lawstar.mod.timer.timers.PerTimer;
import com.lawstar.mod.timer.timers.TimerPojo;
/**
*@author 鸭梨 E-MAIL:togetyou@gmail.com
*date and time:Oct 13, 2009 5:53:02 PM
*comp:law-star
*/
public class StartTimerServ extends HttpServlet implements ServletContextListener{
/**
* 销毁定时器
*/
public void contextDestroyed(ServletContextEvent sce) {
System.out.println("des the timer");
List<com.lawstar.mod.timer.timers.AlarmClock> listCL = (List)sce.getServletContext().getAttribute("timerList") ;
System.out.println("listcl:"+listCL.size());
for(Iterator<AlarmClock> it = listCL.iterator() ;it.hasNext();){
AlarmClock al = it.next() ;
al.cancel() ;
System.out.println("---销毁定时器---"+al.getName());
}
List<PerTimer> listPer = (List)sce.getServletContext().getAttribute("perList") ;
System.out.println("listPer:"+listPer.size());
for(Iterator<PerTimer> it = listPer.iterator() ;it.hasNext();){
PerTimer al = it.next() ;
al.cancel() ;
System.out.println("---销毁定时器---"+al.getName());
}
}
public void contextInitialized(ServletContextEvent sce) {
// 什么也不干
}
// 每天执行的定时器的列表
private List timerList = new ArrayList();
// 间隔定时器列表
private List perList = new ArrayList();
public StartTimerServ() {
super();
}
/**
* Destruction of the servlet. <br>
*/
public void destroy() {
super.destroy(); // Just puts "destroy" string in log
// Put your code here
}
/**
* The doGet method of the servlet. <br>
*
* This method is called when a form has its tag value method equals to get.
*
* @param request the request send by the client to the server
* @param response the response send by the server to the client
* @throws ServletException if an error occurred
* @throws IOException if an error occurred
*/
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html");
PrintWriter out = response.getWriter();
out.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");
out.println("<HTML>");
out.println(" <HEAD><TITLE>A Servlet</TITLE></HEAD>");
out.println(" <BODY>");
out.print(" This is ");
out.print(this.getClass());
out.println(", using the GET method do nothing");
out.println(" </BODY>");
out.println("</HTML>");
out.flush();
out.close();
}
/**
* The doPost method of the servlet. <br>
*
* This method is called when a form has its tag value method equals to post.
*
* @param request the request send by the client to the server
* @param response the response send by the server to the client
* @throws ServletException if an error occurred
* @throws IOException if an error occurred
*/
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html");
PrintWriter out = response.getWriter();
out
.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");
out.println("<HTML>");
out.println(" <HEAD><TITLE>A Servlet</TITLE></HEAD>");
out.println(" <BODY>");
out.print(" This is ");
out.print(this.getClass());
out.println(", using the POST method do nothing");
out.println(" </BODY>");
out.println("</HTML>");
out.flush();
out.close();
}
/**
* servlet 初始化 启动定时器
*/
public void init() throws ServletException {
LoadTimerConfig ltc = new LoadTimerConfig();
List<TimerPojo> ltList = ltc.getTimerList("timer.xml") ;
System.out.println(ltList.size()) ;
TimerPojo tpo = null ;
String type = "" ;
for(int i=0;i<ltList.size();i++) {
tpo = ltList.get(i) ;
type = tpo.getType() ;
if("range".equals(type)) {
PerTimer ptm = new PerTimer(tpo.getName()) ;
ptm.setUrlList(tpo.getUrlList()) ;
ptm.runTask(tpo.getRange());
perList.add(ptm) ;
}
else if("eday".equals(type)) {
AlarmClock alm = new AlarmClock(tpo.getHour(),tpo.getMinute(),tpo.getSec(),tpo.getName()) ;
alm.setUrlList(tpo.getUrlList()) ;
alm.start() ;
timerList.add(alm) ;
}
}
this.getServletContext().setAttribute("perList", perList) ;
this.getServletContext().setAttribute("timerList", timerList) ;
}
}
