Server records: Session
Small example: remember password at login
Basic structure as pictured
Loginaction.java
Package com.action;
Import java.io.IOException;
Import javax.servlet.ServletException;
Import Javax.servlet.http.Cookie;
Import Javax.servlet.http.HttpServlet;
Import Javax.servlet.http.HttpServletRequest;
Import Javax.servlet.http.HttpServletResponse;
@SuppressWarnings ("Serial")
public class Loginaction extends HttpServlet {
public void doget (HttpServletRequest request, httpservletresponse response)
Throws Servletexception, IOException {
}
public void DoPost (HttpServletRequest request, httpservletresponse response)
Throws Servletexception, IOException {
String Username=request.getparameter ("username");
String password=request.getparameter ("Userpass");
String flag=request.getparameter ("flag");
String path= "/error.jsp";
if ("admin". Equals (username) && "123". Equals (password)) {
if (Flag!=null&&flag.equals ("select")) {
Cookies c1=new Cookies ("uname", username);
Cookies c2=new Cookies ("UPass", password);
Set effective time, in milliseconds
c1.setmaxage (60*60*60*24);
c1.setmaxage (60*60*60*24);
response.addcookie (C1);
response.addcookie (C2 );
}else{
cookie c1=new Cookies ("uname", username);
cookie c2=new Cookies ("UPass", password);
c1.setmaxage (0);
c1.setmaxage (0);
response.addcookie (C1);
Response.addcookie (C2);
}
path= "/index.jsp";
}  &NBSP
request.getrequestdispatcher (path). Forward (request,response); }
}
*************************************************************************************************************** ********************************************
Index.xml
<%@ page language= "java" import= "java.util.*" pageencoding= "Utf-8"%>
<! DOCTYPE HTML PUBLIC "-//w3c//dtd HTML 4.01 transitional//en" >
<title>cookie</title>
<body>
<form action= "login.do" method= "POST" >
User: <input type= "text" name= "username" value= "${cookie.aname.value}" ><br/>
Password: <input type= "password" name= "Userpass" value= "${cookie.apsss.value}" ><br/>
Remember password: <input type= "checkbox" name= "Flag" value= "select" ${cookie.aname.value}!=null? ' Checked ': '/>
<%--? : An expression
If you are not empty, you are chosen, you are not chosen, you do not remember your password.
--%>
<br/>
<input type= "Submit" value= "Login" >
</form>
</body>
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