web.xml을 이용한 서블릿 매핑

 

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<!-- Licensed to the Apache Software Foundation (ASF) under one or more contributor 
	license agreements. See the NOTICE file distributed with this work for additional 
	information regarding copyright ownership. The ASF licenses this file to 
	You under the Apache License, Version 2.0 (the "License"); you may not use 
	this file except in compliance with the License. You may obtain a copy of 
	the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required 
	by applicable law or agreed to in writing, software distributed under the 
	License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS 
	OF ANY KIND, either express or implied. See the License for the specific 
	language governing permissions and limitations under the License. -->
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee
                      http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
	version="4.0" metadata-complete="true">

	<servlet>
		<servlet-name>na</servlet-name>
		<servlet-class>com.newlectrue.web.Nana</servlet-class>
	</servlet>
	<servlet-mapping>
		<servlet-name>na</servlet-name>
		
		<!-- /hello 주소로 요청이 들어오면 com.newlectrue.web.Nana 클래스를 로드해서 실행하여 결과 반환 -->
		<url-pattern>/hello</url-pattern>
	</servlet-mapping>

	<display-name>Welcome to Tomcat</display-name>
	<description>
     Welcome to Tomcat
  </description>

</web-app>

 

Nana.java

package com.newlectrue.web;

import java.io.IOException;
import java.io.PrintWriter;

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

public class Nana extends HttpServlet {

	@Override
	protected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

//		super.service(req, resp);

		PrintWriter out = resp.getWriter();
		out.println("hello asdsadasdasdsad");
	}

}

 

https://youtu.be/0fASNgpvkOQ?list=PLq8wAnVUcTFVOtENMsujSgtv2TOsMy8zd&t=414