A web application for implementation: The user is first served a login page which takes user’s name and password. After submitting the details the server checks these values against the data from a database and takes following decisions. If name and password matches, serves a welcome page with user’s full name. If name matches and password doesn’t match, then serves “password mismatch “page.
If name is not found in database serves a registration page where user’s full name is asked and on submitting the details are stored in database
To implement the above program using servlets all u require is :
1.Tomcat container
2.Notepad
3.Browser
4.Connector.jar file which is to be placed in tomcat's lib folder
Initially u have to create a folder structure as follows:
As u can see in the above image the html files are kept outside.It is your choice to keep it in src folder or not.
The login.html file consist of
Focus on the action attribute in the above form, the url port number may change based on ur tomcats setting.
The regi.html file consist of
The WEB-INF directory consists of
The classes folder may consist of all the java files and .class files as follows
The servlet process.java has following set of instructions:
The servlet regi.java has following
Open mysql and create the required database and tables as follows
After writing the java files u have to compile it in cmd prompt
Once compiled move out of classes folder and type web.xml contents
Open Tomcat and type the url of ur project
Initially i assumed no user information is present in the database so u will be redirected to registration page.
After registration u will be asked to login ,These are the details of the registered user in mysql.
Once u specify the password and username u will get successfull response.
If by mistake u forgot and specified wrong password u will get the following message.
This is it.Same logic we can implement in jsp and php as well.U can also use framesets for this program just like i discussed in my previous posts.Do not stick to same program try to use either bootstrap or manual css for enhancing its looks.
Hope this post is useful to all who are watching right now.
