servlet life-cycle

servlet lilfe-cycle 생명주기

 

생명주기 코드로 보기

package com.servlet;

import java.io.IOException;

import javax.annotation.PostConstruct;
import javax.annotation.PreDestroy;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * Servlet implementation class ServletEx
 */
@WebServlet("/SE1")
public class ServletEx extends HttpServlet {
	
	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {//실질적 service부분
		// TODO Auto-generated method stub
		response.getWriter().append("Served at: ").append(request.getContextPath());
		
		
		
	}
	@PostConstruct//servlet 생성 준비
	public void PostConstruct() {
		System.out.println("PostConstruct");
	}
	
	@Override//servlet 생성
	public void init() throws ServletException {
		System.out.println("init");
	}
	@Override//servlet 소멸
	public void destroy() {
		System.out.println("destroy");
	}
	@PreDestroy//servlet 종료
	public void preDestroy() {
		System.out.println("preDestroy");
	}

	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		doGet(request, response);
	}

}

 

로그

정보: 서버가 [361] 밀리초 내에 시작되었습니다.
PostConstruct
init
do get

 

이후 web server가 종료되면

destroy 
preDestroy

해당 로그가 출력됩니다!