過濾器
監聽器
javaBean
代碼實例
javaBean
package j;
public class user {
private String s;
public user(String s) {
super();
this.s = s;
}
public String getS() {
return s;
}
public void setS(String s) {
this.s = s;
}
}
登錄頁面
<%@page pageEncoding="utf-8" %>
<html>
<body>
<h1>請登錄!</h1>
<form action="MyJsp.jsp" method="POST">
用戶名:<input name="s"/><br/>
密碼:<input name="password" type="password"/><br/>
<input type="submit"/>
</form>
</body>
</html>
判斷頁面MyJsp.jsp
<%@page import="j.user" %>
<jsp:useBean id="u" class="j.user" scope="session"></jsp:useBean>
<jsp:setProperty property="s" name="u" />
<body>
<%
/**第一種使用javabean
user u=new user(request.getParameter("username"));*/
if(u.getS()!=null&&u.getS().equals("n"))
{session.setAttribute("login", "true");
response.sendRedirect("m.jsp");
}
else
{ out.println("fail");
%>
<jsp:getProperty property="s" name="u"/><%} %>
</body>