서블릿 매핑

web.xml servlet 매핑 설정.

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
  <display-name>pro5</display-name>
  <welcome-file-list>
    <welcome-file>index.html</welcome-file>
    <welcome-file>index.htm</welcome-file>
    <welcome-file>index.jsp</welcome-file>
    <welcome-file>default.html</welcome-file>
    <welcome-file>default.htm</welcome-file>
    <welcome-file>default.jsp</welcome-file>
  </welcome-file-list>
  
  <servlet>
  	<servlet-name>aaa</servlet-name>
  	<servlet-class>sec01.ex01.FirstServlet</servlet-class>
  </servlet>
  <servlet>
  	<servlet-name>bbb</servlet-name>
  	<servlet-class>sec01.ex01.SecondServlet</servlet-class>
  </servlet>
  
  <servlet-mapping>
  	<servlet-name>aaa</servlet-name>
  	<url-pattern>/first</url-pattern>
  </servlet-mapping>
  <servlet-mapping>
  	<servlet-name>bbb</servlet-name>
  	<url-pattern>/second</url-pattern>
 </servlet-mapping>
 
</web-app>

 

 

 

FirstServlet 

package sec01.ex01;

import java.io.IOException;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class FirstServlet extends HttpServlet{
	@Override
	public void init() throws ServletException{
		System.out.println("init 메서드 호출");
	}
	
	@Override
	protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException{
		System.out.println("doGet메서드 호출");
	}
	
	@Override
	public void destroy() {
		System.out.println("destory 메서드 호출");
	}
	
}

SecondServlet

package sec01.ex01;

import java.io.IOException;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class SecondServlet extends HttpServlet{
	@Override
	public void init() throws ServletException{
		System.out.println("Init 메서드 호출");
		}
	
	@Override
	protected void doGet(HttpServletRequest req, HttpServletResponse rep) throws ServletException, IOException{
		System.out.println("doGet 메서드 호출");
	}
	
	@Override
	public void destroy() {
		System.out.println("destory 메서드 호출");
	}
}

 

탐캣을 실행하시고 웹브라우저에 http://localhost:8080/pro5/first or second를 하시면 Init 이 한번 실행되고 doGet메소드는 주소를 한번 입력할때마다 계속 console에 log가 출력되게 됩니다.