j_security_check in JSP
By: aathishankaran in JSP Tutorials on 2007-02-13
Some sites require that all users log-in using a username and password, before being able to visit any page.
This can be done using JSP sessions or servlets, and in fact this was a common technique for a while. But starting with a new release of Servlets specifications from Sun, this feature is now very simple to implement.
It is no longer necessary to use JSP techniques to provide login/password protection, but it is still a very common requirement of web sites, therefore a brief overview is provided here.
To password-protect your site, you just need to design a login page. This page can be as simple or complicated as you need it to be. It must contain a <FORM> tag, with the METHOD set to POST and the ACTION set to "j_security_check".
<FORM METHOD=POST ACTION=j_security_check>
The target j_security_check is provided by the application server, and does not need to be coded.
The form must contain two <INPUT> fields, named j_username and j_password respectively for the username and password. Typically, the username field will be a TEXT input field, and the password field will be a PASSWORD input field.
After this, you must tell your application server to password protect your pages using the login page you have provided. The details will vary from server to server, but a good implementation will provide you hook that you can use, for example, to match usernames and passwords against a database.
<< JSP Program to display Date
Sessions in JSP >>
This policy contains information about your privacy. By posting, you are declaring that you understand this policy:
- Your name, rating, website address, town, country, state and comment will be publicly displayed if entered.
- Aside from the data entered into these form fields, other stored data about your comment will include:
- Your IP address (not displayed)
- The time/date of your submission (displayed)
- Your email address will not be shared. It is collected for only two reasons:
- Administrative purposes, should a need to contact you arise.
- To inform you of new comments, should you subscribe to receive notifications.
- A cookie may be set on your computer. This is used to remember your inputs. It will expire by itself.
This policy is subject to change at any time and without notice.
These terms and conditions contain rules about posting comments. By submitting a comment, you are declaring that you agree with these rules:
- Although the administrator will attempt to moderate comments, it is impossible for every comment to have been moderated at any given time.
- You acknowledge that all comments express the views and opinions of the original author and not those of the administrator.
- You agree not to post any material which is knowingly false, obscene, hateful, threatening, harassing or invasive of a person's privacy.
- The administrator has the right to edit, move or remove any comment for any reason and without notice.
Failure to comply with these rules may result in being banned from submitting further comments.
These terms and conditions are subject to change at any time and without notice.
- Data Science
- React Native
- Cloud Computing
- Java Beans
- Mac OS X
- Office 365
- Tech Reviews
Show a calendar for user input in JSP
Encrypting Passwords in Tomcat using Servlets
Steps to get a Free SSL certificate for your Tomcat
JSP Tags for SQL to connect to a database
LifecycleException: service.getName(): "Catalina"; Protocol handler start failed: `java.net.BindException: Permission denied <null>:80
Uploading a file to a server using JSP
Uploading an Image to a Database using JSP
A JSP page that gets properties from a bean
Querying Data with the JSTL in JSP