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내장객체 활용 웹 페이지
게시판 웹 페이지
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8" import="java.util.ArrayList"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
<%
if (session.getAttribute("id") == null) {
%>
<form action="b.jsp" method="post">
<input type="text" name="mid" placeholder="아이디" required="required">
<input type="password" name="mpw" placeholder="비밀번호" required="required">
<input type="submit" value="로그인">
</form>
<%
} else {
%>
<form action="d.jsp">
<input type="submit" value="로그아웃">
</form>
<%
}
%>
<%
if (session.getAttribute("id") != null) {
%>
<hr>
<form action="c.jsp">
<input type="text" name="content" placeholder="내용을 입력해주세요.">
<input type="submit" value="글작성">
</form>
<%
}
%>
<hr>
<ul>
<%
ArrayList<String> list = (ArrayList<String>)application.getAttribute("list");
if (list == null) {
out.println("등록된 글이 없습니다.");
} else {
for (String v : list) {
out.println("<li>" + v + "</li>");
}
}
%>
</ul>
</body>
</html>a.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<jsp:useBean id="mDAO" class="model.MemberDAO"/>
<jsp:useBean id="mVO" class="model.MemberVO"/>
<jsp:setProperty property="*" name="mVO"/>
<%
mVO = mDAO.selectOne(mVO);
if (mVO == null) {
out.println("<script>alert('로그인 실패...'); history.go(-1);</script>");
} else {
session.setAttribute("id", mVO.getMid());
// out.println("<script>location.href = 'a.jsp';</script>");
response.sendRedirect("a.jsp");
}
%>b.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8" import="java.util.ArrayList"%>
<%
String id = (String)session.getAttribute("id");
String content = request.getParameter("content");
ArrayList<String> list = (ArrayList<String>)application.getAttribute("list");
System.out.println("글정보: " + content);
if (request.getParameter("content").equals("")) { // 현재 내용이 공백인지
out.println("<script>alert('내용을 입력해주세요.');</script>");
} else {
if (list == null) {
list = new ArrayList<String>();
application.setAttribute("list", list);
}
list.add(0, id + ": " + content);
}
// response.sendRedirect("a.jsp");
// out.println("<script>history.go(-1);</script>");
out.println("<script>location.href = 'a.jsp';</script>");
%>c.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%
session.removeAttribute("id");
response.sendRedirect("a.jsp");
%>d.jsp
방문자 수 확인 웹 페이지
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
</head>
<body>
<%
application.setAttribute("memberName", "홍길동");
application.setAttribute("cnt", 0);
%>
<a href="test02.jsp">방문자수 확인하기</a>
</body>
</html>test1.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
<%
Integer cnt = (Integer)application.getAttribute("cnt");
cnt++;
application.setAttribute("cnt", cnt);
%>
오늘의 방문자수는 <%= cnt %> 명입니다.
</body>
</html>test2.jsp
GitHub
https://github.com/Qkrwnsgus0522/JSP
GitHub - Qkrwnsgus0522/JSP
Contribute to Qkrwnsgus0522/JSP development by creating an account on GitHub.
github.com
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