Re: ReDirect에서 ServletContext로 Scope 연결 해보기

[허승표]

package ex2;

import java.io.IOException;

import jakarta.servlet.ServletContext;

import jakarta.servlet.ServletException;

import jakarta.servlet.annotation.WebServlet;

import jakarta.servlet.http.HttpServlet;

import jakarta.servlet.http.HttpServletRequest;

import jakarta.servlet.http.HttpServletResponse;

// 이동방식 : Forward, Redirect : 주체객체는 -request, response 객체

@WebServlet("/first")

public class FirstServlet extends HttpServlet {

private ServletContext ctx; // null값 => 선언만했기 때문에

// 생성을 하고

@Override

public void init() throws ServletException {

ctx = getServletContext();

}

@Override

protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

System.out.println("FirstServlet 실행 됨");

ctx.setAttribute("mymsg", "안녕하세요");

resp.sendRedirect("second");

}

}

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package ex2;

import java.io.IOException;

import java.io.PrintWriter;

import jakarta.servlet.ServletContext;

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("/second")

public class SecondServlet extends HttpServlet {

private ServletContext ctx;

@Override

public void init() throws ServletException {

ctx = getServletContext();

}

@Override

protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

resp.setContentType("text/html;charset=UTF-8");

System.out.println("여기는 SecondServlet");

PrintWriter out = resp.getWriter();

out.println("<ul>");

out.println("<li>" + ctx.getAttribute("mymsg") + "</li>");

out.println("</ul>");

}

}