This week's book giveaway is in the Agile and Other Processes forum.
We're giving away four copies of The Journey To Enterprise Agility and have Daryl Kulak & Hong Li on-line!
See this thread for details.
Win a copy of The Journey To Enterprise Agility this week in the Agile and Other Processes forum! And see the welcome thread for 20% off.
  • Post Reply Bookmark Topic Watch Topic
  • New Topic
programming forums Java Mobile Certification Databases Caching Books Engineering Micro Controllers OS Languages Paradigms IDEs Build Tools Frameworks Application Servers Open Source This Site Careers Other all forums
this forum made possible by our volunteer staff, including ...
Marshals:
  • Jeanne Boyarsky
  • Liutauras Vilda
  • Campbell Ritchie
  • Tim Cooke
  • Bear Bibeault
Sheriffs:
  • Paul Clapham
  • Junilu Lacar
  • Knute Snortum
Saloon Keepers:
  • Ron McLeod
  • Ganesh Patekar
  • Tim Moores
  • Pete Letkeman
  • Stephan van Hulst
Bartenders:
  • Carey Brown
  • Tim Holloway
  • Joe Ess

doGet  RSS feed

 
Ranch Hand
Posts: 125
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
If I have a servlet called LoginServlet that accepts username and password
and I display this form in the doGet() method, when I submit this form I want doGet() of LoginServlet to be called again so that it can check with database .
But won't the username and password be null this time?
What must I do to prevent it from becoming null the second time I call doGet()?
 
author & internet detective
Marshal
Posts: 38502
653
Eclipse IDE Java VI Editor
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
I'm not sure I'm understanding this right. Wouldn't it be null the first time and not the second time? It sounds to me like the first time, you display the form (and the userid/password are not known yet.)
In general, if you want to remember attributes, you can store them in the session.
 
Lucky Singh
Ranch Hand
Posts: 125
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
How do I do that?
 
Ranch Hand
Posts: 365
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
You can also pass it back and forth in in the request using request.setAttribute in the servlet and request.getAttribute in the JSP. You'll need the RequestDispatcher object to forward the request back to the JSP though.
One thing I do not understand is the use of the GET in the form which will subsequently call the doGet method of the servlet. Choosing GET as the method in the form will append all of the data to the URL and it will show up in the URL bar of your browser. This doen't seem like something you'd want to do for a login screen. I'd use POST instead.
 
Ranch Hand
Posts: 170
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator

From then on whereever you want to use these details, like in JSP or any other servlet you can type the following get the details


UserInfo class

Hope this helps
 
Sekhar Kadiyala
Ranch Hand
Posts: 170
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
The first piece of code you need to write in the logon servle.
In the Logon servlet, you can put the code after the userid/password validation.
 
Don't get me started about those stupid light bulbs.
  • Post Reply Bookmark Topic Watch Topic
  • New Topic
Boost this thread!