用jsp實現登入，登入成功則跳轉到登入成功頁面，失敗則跳轉到失敗頁面
阿新 • • 發佈：2019-02-13
login.jsp
<%@ page language="java" contentType="text/html; charset=utf-8" pageEncoding="utf-8"%> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> <title>Insert title here</title> </head> <body> <div> <form action="dologin.jsp" method="post"> <span>使用者名稱</span> <input type="text" name="username" /> <span>密碼</span> <input type="text" name="password" /> <input type="submit" value="登入"/> </form> </div> </body> </html>
dologin.jsp
<%@ page language="java" contentType="text/html; charset=utf-8" pageEncoding="utf-8"%> <% String path=request.getContextPath(); String basePath=request.getScheme()+"://"+request.getServerName() +":"+request.getServerPort()+path+"/"; String username=""; String password=""; request.setCharacterEncoding("utf-8"); username=request.getParameter("username"); password=request.getParameter("password"); out.println(username); out.println(password); if("admin".equals(username) && "admin".equals(password)){ session.setAttribute("loginUsername", username); session.setAttribute("loginUser",username); request.getRequestDispatcher("login_success.jsp").forward(request,response); }else{ response.sendRedirect("login_failure.jsp"); } %>
login_success.jsp
<%@ page language="java" contentType="text/html; charset=utf-8" pageEncoding="utf-8"%> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> <title>Insert title here</title> </head> <body> <div> 歡迎<h3><%=session.getAttribute("loginUsername") %></h3>，登入成功！！！！ </div> </body> </html>
login_failure.jsp
<%@ page language="java" contentType="text/html; charset=utf-8"
pageEncoding="utf-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
<div>
登入失敗，請檢查使用者名稱或者密碼！！！
<a href="login.jsp">login</a>
</div>
</body>
</html>