servlet 어노테이션을 활용한 url 매핑

그 전에는 web.xml에 파일에 아래를 추가했지만

  <servlet>
      <servlet-name>na</servlet-name>
      <servlet-class>com.newlec.web.Nana</servlet-class>
  </servlet>

  <servlet-mapping>
      <servlet-name>na</servlet-name>
      <url-pattern>/hello</url-pattern>
  </servlet-mapping>

어노테이션을 활용하면 추가해주지 않아도 된다! 대신 web.xml에 파일에서 metadata-complete를 false로 설정해줘야한다.

package com.newlec.web;

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

import jakarta.servlet.ServletException;
import jakarta.servlet.annotation.WebServlet;
import jakarta.servlet.http.HttpServlet;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;

@WebServlet("/hello")
public class Nana extends HttpServlet{
	@Override
	protected void service(HttpServletRequest req, HttpServletResponse res) throws ServletException, IOException {
		PrintWriter out = res.getWriter();
		out.println("Hello");
	}
}