JSP에서의 세션(session)에 대해서...

2017. 8. 11. 09:39

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 	<%
 		// request 객체를 통해 세션을 얻을 수도 있고...
 		HttpSession mySession = request.getSession();
 		// jsp에서는 바로 내장 session 객체를 통해 접근하면 된다.
 		
 		// 세션에 key,value 식으로 데이터를 저장할 수 있는대, 이때 key(String), value(Object)타입이다.
 		session.setAttribute("age", 28);
 		session.setAttribute("name", "hyr");
 		
 		// 브라우저만 같으면 다른 페이지에서 세션은 공유되기 때문에 다른 페이지에서 아래와 같은 getAttribute 메서드를 이용해 값을 꺼낼 수 있다.
 		Object age = session.getAttribute("age");
 		int ageVal = Integer.parseInt(age.toString());
 		String name = (String)session.getAttribute("name");
		// 한번에 세션에 있는 전체 key들 가져오기
 		Enumeration e = session.getAttributeNames();
 		while(e.hasMoreElements()){
 			String key = (String)e.nextElement();
			Object sessionVal = session.getAttribute(key);
 		}
 		
 		// 세션의 고유 아이디 얻기
 		String sessionId = session.getId();
 		
 		// 세션 유효시간 설정
 		// 이렇게하거나 또는 web.xml에서 세션 timeout을 설정할 수도 있다.
 		session.setMaxInactiveInterval(60*60);
 		
 		// [세션 삭제]
 				// 세션의 특정 속성만 삭제하기
 				session.removeAttribute("age");
 				// 모든 세션 삭제하기
 				session.invalidate();
 	%>

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