servlet web配置_servletweb配置-优快云博客

本文介绍了一个具体的Servlet配置示例，并展示了其生命周期内的关键方法实现，包括初始化(init)、服务(service)及销毁(destroy)等阶段。

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<display-name></display-name>
   
<servlet>

    <servlet-name>HelloServlet</servlet-name>
    
    <servlet-class>com.atguigu.javaweb.HelloServlet</servlet-class>
</servlet>

<servlet-mapping>
    <servlet-name>HelloServlet</servlet-name>

    <url-pattern>/servlet/HelloServlet</url-pattern>
     
     <load-on-startup>1</load-on-startup>
</servlet-mapping>

2 <servlet 四个生命周期的方法

package com.atguigu.javaweb;

import java.io.IOException;

import javax.servlet.Servlet;
import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServlet;

public class HelloServlet implements Servlet {

   @Override
   public void destroy() {
       // TODO Auto-generated method stub
       System.out.println("destroy");
   }

   @Override
   public ServletConfig getServletConfig() {
       // TODO Auto-generated method stub
       System.out.println("getServletConfig");
       return null;
   }

   @Override
   public String getServletInfo() {
       // TODO Auto-generated method stub
       System.out.println("getServletInfo");
       return null;
   }

   @Override
   public void init(ServletConfig arg0) throws ServletException {
       // TODO Auto-generated method stub
       System.out.println("init");
   }

   @Override
   public void service(ServletRequest arg0, ServletResponse arg1)
           throws ServletException, IOException {
       // TODO Auto-generated method stub

   }ssss
   public HelloServlet(){
       System.out.println("HelloServlet's constrc");
   }

}