lifecycleservlet.java

《j2ee应用开发祥解》一书的源代码

package com.j2ee14.ch8;

import javax.servlet.http.*;
import java.io.*;
import java.sql.*;
/**
 *第理解Servlet的生命周期
 */
public class LifeCycleServlet extends javax.servlet.http.HttpServlet
{

	public void doGet(HttpServletRequest request,HttpServletResponse response)
		throws javax.servlet.ServletException,java.io.IOException
	{ 
       	response.setContentType("text/html;charset=gb2312");
        PrintWriter out = response.getWriter();
        out.println("HelloWorld");
    } 
    /**
     *  对外提供服务
     */
	public void service(HttpServletRequest req, HttpServletResponse resp) 
		throws javax.servlet.ServletException,java.io.IOException
	{
		log(new java.util.Date()+":LifeCycleServlet service"); 
		doGet(req,resp);	
    }
    /**
     *初始化Servlet
     */
    public void init()throws javax.servlet.ServletException
    {
    	log(new java.util.Date()+":LifeCycleServlet is init");
    }
    /**
     *销毁Servlet，在容器关闭时调用
     */
    public void destroy()
    {
    	log(new java.util.Date()+":LifeCycleServlet is destroy");
    }
        
}