2012-4-26 cookie 실습

프로그래밍/JSP Programming

2012-4-26 cookie 실습

조은성 2012. 4. 26. 17:29

* cookie 실습

- servlet class
package : servlet.cookie
name : SetCookieServlet1
GetCookieServlet
url : /setcookie1
/getcookie

package servlet.cookie;

import java.io.IOException;
import java.io.PrintWriter;
import java.text.SimpleDateFormat;
import java.util.Date;

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

public class SetCookieServlet1 extends HttpServlet {
private static final long serialVersionUID = 1L;

    public SetCookieServlet1() {
        super();

    }

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

protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
  //현재 시간을 쿠키정보로 만들어 클라이언트에 전송
  //현재 시간 조회
  Date date = new Date();
  //날짜 포멧전환, E : 요일
  SimpleDateFormat sdf = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss");
  String nowDate = sdf.format(date);

  Cookie c = new Cookie("nowDate",nowDate); //쿠키값 1개 생성
  response.addCookie(c); //쿠키 정보를 client로 전송
  //응답처리
  response.setContentType("text/html;charset=utf-8");
  PrintWriter out = response.getWriter();
  out.println("<html><body>");
  out.println("현재 일시 : "+nowDate);
  out.println("<br><a href='/myweb/getcookie'>Get Cookie요청</a>");
  out.println("</body></html>");
}

}

package servlet.cookie;

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

public class GetCookieServlet extends HttpServlet {
private static final long serialVersionUID = 1L;

    public GetCookieServlet() {
        super();

    }

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

protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
  // SetCookieServlet에서 설정한 쿠키 값을 조회하여 출력
  // 1. 쿠키 조회
  Cookie[] cs = request.getCookies();
  // 2. 출력
  response.setContentType("text/html;charset=utf-8");
  PrintWriter out = response.getWriter();
  out.println("<html><body>");
  for(Cookie c : cs){
   out.println("쿠키 이름 : "+c.getName());
   out.println("쿠키 값 : "+c.getValue()+"<br>");
  }

out.println("</body></html>");

}

}

- 결과

- SetCookieServlet1를 실행한 후에 웹브라우저를 다 닫고 GetCookieServlet다시 실행하면 쿠키 값이 웹브라우저에서 사라져서 500 서버에러를 낸다. 웹브라우저가 하나라도 살아 있으면 쿠키정보를 가지고 있어서 정상 작동 된다.