JSP登录中Session的用法实例详解
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2022-03-08 14:14:45
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; char...
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。
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