서블릿 한방에

@WebServlet("/")   --->모든녀석 다긁어온다

• uri: 클라이언트가 요청한 URI를 저장합니다.
• conPath: 컨텍스트 경로를 저장합니다.
• com: URI에서 컨텍스트 경로를 제외한 부분을 저장합니다.
• startsWith()는 문자열이 특정 문자열로 시작하는지 확인

a.jsp -> a.jsp

b.jsp->b.jsp

 

package controller;

import java.io.IOException;
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("/")
public class MoveTestServlet extends HttpServlet {
	private static final long serialVersionUID = 1L;

	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		String uri = request.getRequestURI();
		String conPath = request.getContextPath();
		String com = uri.substring(conPath.length());
		
		System.out.println(uri);
		System.out.println(conPath);
		System.out.println(com);
		
		if(com.equals("/a") || com.equals("/")) {
			request.getRequestDispatcher("a.jsp").forward(request, response);
		}else if(com.equals("/b")){
			response.sendRedirect("b.jsp");
		}
	}

	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		
	}

}

---

 

package controller;

import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

//모든 요청을 한곳에서 처리하려면
// /로 받는다
@WebServlet("/")
public class MoveTestServlet extends HttpServlet {
	private static final long serialVersionUID = 1L;

	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		String uri = request.getRequestURI();
		String conPath = request.getContextPath();
		String com = uri.substring(conPath.length());
		String view ="";
		System.out.println(uri);
		System.out.println(conPath);
		System.out.println(com);
		

		if(com.equals("/a") || com.equals("/")) {
			view = "a.jsp";
		}else if(com.equals("/b")){
			view = "redirect:b.jsp";
		}else if(com.equals("/list")) {
			view= "redirect:list.jsp";
		}
		
		//view에 담긴 문자열에 따라 포워딩 or 리다이렉팅
		//redirect가 0~8까지라 9부터 끝까지 이동할 페이지 주소
		if(view.startsWith("redirect:")) {
			response.sendRedirect(view.substring(9));
		}else {
			request.getRequestDispatcher(view).forward(request, response);
		}
	}

	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		doGet(request,response);
	}

}