JSP登录中Session的用法实例详解

本文实例讲述了JSP 登录中Session的用法。分享给大家供大家参考，具体如下：

登录页面

<%@ 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=utf-8\”>
<title>Insert title here</title>
</head>
<body>
<div style=\”float:left;margin-top:100px;margin-left:200px;width:400px;height:300px;background:gray;\”>
<form action=\”IndexServlet\” method=\”post\”>
<div style=\”float:left;width:400px;height:30px;background:gray;margin-top:50px\”>
<div style=\”margin-left:70px;float:left;line-height:30px\”>账号:</div><input style=\”disply:block;float:left;width:200px;height:30px;border:none;\” type=\”text\” name=\”user\”/>
</div>
<div style=\”float:left;width:400px;height:30px;background:gray;margin-top:50px\”>
<div style=\”margin-left:70px;float:left;line-height:30px\”>密码:</div><input style=\”disply:block;float:left;width:200px;height:30px;border:none;\” type=\”text\” name=\”password\”/>
</div>
<div style=\”float:left;margin-top:50px;width:400px;height:30px;background:gray;\”>
<input style=\”float:left;width:60px;height:30px;margin-left:170px;border:none;\” type=\”submit\” name=\”ok\” value=\”登录\”/>
</div>
</form>
</div>
</body>
</html>

检测账号密码以及设置session的IndexServlet

import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
/**
* Servlet implementation class IndexServlet
*/
@WebServlet(\”/IndexServlet\”)
public class IndexServlet extends HttpServlet {
private static final long serialVersionUID = 1L;

/**
* @see HttpServlet#HttpServlet()
*/
public IndexServlet() {
super();
// TODO Auto-generated constructor stub
}

/**
* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
response.getWriter().append(\”Served at: \”).append(request.getContextPath());
}

/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
request.setCharacterEncoding(\”utf-8\”);
String user = request.getParameter(\”user\”);
String password = request.getParameter(\”password\”);

String path = request.getContextPath();
HttpSession session=request.getSession();

if (\”1\”.equals(user) && \”1\”.equals(password)) {

session.setAttribute(\”name\”, user);
response.sendRedirect(path + \”/success.jsp\”);

}else{
response.sendRedirect(path + \”/Index.jsp\”);
}
}

}

成功登录页面

<%@ page language=\”java\” import=\”java.util.*\” pageEncoding=\”UTF-8\”%>
<!DOCTYPE html PUBLIC \”-//W3C//DTD HTML 4.01 Transitional//EN\” \”http://www.w3.org/TR/html4/loose.dtd\”>
<%
String path = request.getContextPath();
%>
<%
Object name = session.getAttribute(\”name\”);
if(name==null){
response.sendRedirect(path+\”/Index.jsp\”);
}
%>
<html>
<head>
<title>成功页面</title>
</head>
<body>
恭喜你，骚年，<%=session.getAttribute(\”name\”) %>,成功登陆了！
<a href=\”out.jsp\” rel=\”external nofollow\” >注销</a>
</body>
</html>

注销功能的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=UTF-8\”>
<title>Insert title here</title>
</head>
<body>
<%
String path = request.getContextPath();
%>
<%
session.removeAttribute(\”name\”);
response.sendRedirect(path+\”/Index.jsp\”);
%>
</body>
</html>

希望本文所述对大家jsp程序设计有所帮助。

您可能感兴趣的文章: