서블릿 구현 - Hello world

서블릿 컨테이너가 @WebServlet 애노테이션의 값을 읽어 요청 URL과 서블릿을 연결하는 Map을 생성한다.

 

import java.io.IOException;
import java.io.PrintWriter;
 
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
 
@WebServlet("/hello")
public class HelloWorldServlet extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        PrintWriter out = resp.getWriter();
        out.print("<h1>Hello World</h1>");
    }
}