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How do to prevent user by viewing secured page by clicking back button when session expired..:)
jimmy514in
- Jul 4th, 2010
Please correct me if I am wrong,how about if we have a session.invalidate() method called during the logout button click.And while going back we can just check request.getSession(false) if the session exists then we can continue working else we have a session expired error!
Arindam
- Nov 10th, 2005
You will need to set the appropriate HTTP header attributes to prevent the dynamic content output by the JSP page from being cached by the browser. Just execute the following scriptlet at the beginnin...
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I want to know how to encode textbox in servlet so we find complete column information from the database
Plese help me
Amjad
- Nov 29th, 2005
Hi All,yes, you can encode the data using the Encoded techonology, in the same way you can Decode the data where ever you want.In java we have one package,java.net.URLEncoder and Java.net.URLDecoder. ...
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In servlets, what is the use of sendredirect(),include( ), forward() ?and in applecation level at what scnario they will be used
I know only that send redircet is of client side. and remaing are severside functions
ss
- Nov 10th, 2005
sendredirect() is a method to send a file to user when perticular condition is true.include() and forward() methods are using in requestDispatcher() in this case.reqdis.include() takes the input...
surae
- Nov 4th, 2005
sendredirect() is used to redirect the request to the webpage present in some other server.forward() is used to redirect the request to the webpage present in the same server.include() is used to include the request to the webpage present in the same server.
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I can do every thing using jsp itself,then what is the need of using servlet?in which situation ,we must use servlet with jsp?
jimmy514in
- Jul 4th, 2010
JSP's are for view.You are normally supposed to just view the O/p using JSP.Servlets are the controller classes,They delegate the requests to the appropriate business logic class (Model) to execut...
Amit Kumar
- Feb 7th, 2006
We cann't implements interface in Jsp but it is in the servlet. Yes, it is true, we can every thing in JSP as in the servlet. But, Jsp is always used for design layout or view whereas the servlet is u...
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What are the types of refrences available in java. How they work
Akshay
- Apr 19th, 2006
hi,I apprciate ur answer,if u know jsp then tell me in jsp if there is include directive element then why they have provided include action element. &nbs...
ak40732
- Mar 25th, 2006
Threre are two types of References available in Java. 1.Interface references.2.Class references.Interface references:The interface references are used to implement runtime polymorphis...
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What is the purpose of doPUT() and doDELETE() method?
sudhakarchowdary
- Jan 12th, 2007
doPUT: The PUT method is a complement of a GET request, and PUT stores the entity body at the location specified by the URI. It is similar to the PUT function in FTP.doDELETE: The DELETE method is use...
santh kumar
- Sep 22nd, 2006
These 2 methods are called by the server.doPut():- a servlet handles PUT request made by the client to put a file,web page or a document in the server and is similar to sending a file by FT...
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Controller Functions
Describe the functions of Controller?
kotapati.krishna
- Jul 7th, 2010
When I was using controller functions in servlets container the total servlet programming under control the service(), userdefined methods.
prateeks88
- Nov 4th, 2008
Controller as the name specifies is a part of the application server that controlles the whole application.In MVC(if you are aware of model,view,controller) the maintasks of the controller are:1> Take...
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If you want a servlet to take the same action for both GET and POST request, what should you do?
Simply have doGet call doPost, or vice versa.
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Which code line must be set before any of the lines that use the PrintWriter?
setContentType() method must be set before transmitting the actual document.
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How HTTP Servlet handles client requests?
An HTTP Servlet handles client requests through its service method. The service method supports standard HTTP client requests by dispatching each request to a method designed to handle that request.
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What is the difference between requestDispatcher and namedDispatcher?
nil.choudhary
- Feb 17th, 2007
What I found is there is nothing called namedDispatcher. But there is a method called getNamedDispatcher() in servletcontext which is similar to getRequestDispatcher(). &n...
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What is the difference between Single Thread Model and Multi Thread Model?In which situation we use the Single Threaded Model?
akantilal
- Jun 12th, 2007
The single thread model means that your servlet would not be multi-threaded. If there are two concurrent requests to your servlet, then 2 instances of your servlet will be created to process these 2 r...
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When you have action=get?
Harish
- Feb 16th, 2006
when we are sure that we are going to send certain amount of bytes or characters upto 400 bytes , we can use GET. If it exceeds that limit we can go for POST. Any number of bytes can be sent over the net as name and value pair and bundled with HTTP.Regards
javamatrix
- Sep 30th, 2005
By default, every request sent is by GET. only when we explicitly mention that the method is post, is the request sent by post.
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Is servlet is used to create a dynamic webpage or Static webpage or both?
Yes both servlet is used to create a static and dynamic webpage,it also create a static webpage using serverside include it is .shtml extension,and so servlet is flexible character.
Servlets Interview Questions
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