實驗三 JSP內置對象和JavaBean
- 編寫3個JSP頁面login_1.jsp、server.jsp和loginSuccess.jsp。在頁面login_1.jsp中的輸入用戶名和密碼,單擊“提交”按鈕將輸入的信息提交給頁面server.jsp。在server.jsp頁面中進行登錄驗證:如果輸入正確(用戶名“zhangsan”,密碼“123”),提示“成功登錄,3秒鐘後進入loginSuccess.jsp頁面”,如果輸入不正確,重新定向到login_1.jsp頁面。先運行login_1.jsp頁面,頁面運行效果如圖所示。
參考代碼如下:
(1) login_1.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>
<form action="server.jsp" method="post" name=form>
姓名:<input type="text" name="username"><br>
密碼:<input type="password" name="password"><br>
<input type="submit" value="提交">
</form>
</body>
</html>
(2) server.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>
<%
String name = request.getParameter("username");
String mm=request.getParameter("password");
if ("zhangsan".equals(name)&&"123".equals(mm)) {
out.print("成功登錄,3秒鐘後進入loginSuccess.jsp頁面");
response.setHeader("refresh","3;url=loginSuccess.jsp");
} else {
response.sendRedirect("login_1.jsp");
}
%>
</body>
</html>
(3) loginSuccess.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>
歡迎張三登錄成功!
</body>
</html>