JSP enables automatic website login through Session and Cookie

Step 1: once the [automatic logon] option is selected during login, the following code must be appended after the login is successful. generally, the website provides the function of saving the user name, so I wrote this out. Only passwords are handled separately.
The host is your domain name.
Login. jsp

 

The code is as follows:

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String host = request. getServerName (); Cookie cookie = new Cookie ("SESSION_LOGIN_USERNAME", username); // save the user name to Cookie Cookie. setPath ("/"); Cookie. setDomain (host ); Cookie. setMaxAge (99999999 ); Response. addCookie (cookie ); If (ParamUtils. getBooleanParameter (request, "savePassword ")){ // Save the password to the Cookie. Be sure to encrypt it. Cookie = new Cookie ("SESSION_LOGIN_PASSWORD", MD5.encode (u. getPassword ())); Cookie. setPath ("/"); Cookie. setDomain (host ); Cookie. setMaxAge (99999999 ); Response. addCookie (cookie );         }

In this way, the Cookie is generated
Step 2: When the user accesses the website, if the user detects that the user has not logged on, the following judgment will be made.

The code is as follows:

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Index. jsp String usernameCookie = null; String passwordCookie = null; Cookie [] cookies = request. getCookies (); If (cookies! = Null ){ For (Cookie cookie: cookies ){ If ("SESSION_LOGIN_USERNAME". equals (cookie. getName ())){ UsernameCookie = cookie. getValue (); // Obtain the cookie username         } If ("SESSION_LOGIN_PASSWORD". equals (cookie. getName ())){ PasswordCookie = cookie. getValue (); // Obtain the cookie password. } Www.111cn.net       } If (usernameCookie! = Null & passwordCookie! = Null) {// if Yes If (Login. checkLogin (usernameCookie, passwordCookie )){ // Process successful login } Else { // Handle unsuccessful login         }       }     }

Is it easy?