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>用户名</span>
<input type="text" name="username" />
<span>密码</span>
<input type="text" name="password" />
<input type="submit" value="登录"/>
</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>
欢迎<h3><%=session.getAttribute("loginUsername") %></h3>，登录成功！！！！
</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>
登录失败，请检查用户名或者密码！！！
<a href="login.jsp">login</a>
</div>
</body>
</html>
