JSP Implicit Objects

JSP Implicit objects are created by the web container. These implicit objects are Java objects that implement interfaces in the Servlet and JSP API. Scripting elements in a JSP page can make use of these JSP implicit objects. There are nine (9) JSP implicit objects available.

JSP Implicit Objects are as follows:

  1. request implicit object

    The JSP implicit request object is an instance of a java class that implements the javax.servlet.http.HttpServletRequest interface. It represents the request made by the client. The request implicit object is generally used to get request parameters, request attributes, header information and query string values.

  2. response implicit object

    The JSP implicit response object is an instance of a java class that implements the javax.servlet.http.HttpServletResponse interface. It represents the response to be given to the client. The response implicit object is generally used to set the response content type, add cookie and redirect the response.

  3. out implicit object

    The JSP implicit out object is an instance of the javax.servlet.jsp.JspWriter class. It represents the output content to be sent to the client. The out implicit object is used to write the output content.

  4. session implicit object

    The JSP implicit session object is an instance of a java class that implements the javax.servlet.http.HttpSession interface. It represents a client specific conversation. The session implicit object is used to store session state for a single user.

  5. application implicit object

    The JSP implicit application object is an instance of a java class that implements the javax.servlet.ServletContext interface. It gives facility for a JSP page to obtain and set information about the web application in which it is running.

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  6. exception implicit object

    The JSP implicit exception object is an instance of the java.lang.Throwable class. It is available in JSP error pages only. It represents the occured exception that caused the control to pass to the JSP error page.

  7. config implicit object

    The JSP implicit config object is an instance of the java class that implements javax.servlet.ServletConfig interface. It gives facility for a JSP page to obtain the initialization parameters available.

  8. page implicit object

    The JSP implicit page object is an instance of the java.lang.Object class. It represents the current JSP page. That is, it serves as a reference to the java servlet object that implements the JSP page on which it is accessed. It is not advisable to use this page implict object often as it consumes large memory.

  9. pageContext implicit object

    The JSP implicit pageContext object is an instance of the javax.servlet.jsp.PageContext abstract class. It provides useful context information. That is it provides methods to get and set attributes in different scopes and for transfering requests to other resources. Also it contains the reference to to implicit objects.

This JSP tutorial was added on 11/05/2008.

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Comments on "JSP Implicit Objects"

  1. Lokesh Chandramohan says:

    Awesome,Excellent.You are from Virtusa.

  2. avinash says:

    ur explanation is good ..but if some example is avilable it will be better …..

  3. Areeg says:

    How can I call jsp page from java class without using HttpServlet?

  4. San_Krish says:

    UseFul stuff

  5. ramu says:

    how many implicit objects are there in every java class?

  6. Anonymous says:

    thnk uuuuuuuuu

  7. Megha says:

    Really Helpful for interview questions !!
    Keep Posting sir, Great Job !!

  8. chaitanya says:

    sir, it was really easy to understand.. thanks alot sir…

  9. PSG says:

    The JSP implicit pageContext object is an instance of the javax.servlet.jsp.PageContext abstract class.

    I think “instance of” should be changed with “implementation of” because you can’t have an instance of a abstract class!.

  10. Anonymous says:

    i like ur posts Master

  11. Anonymous says:

    thank u for ur guidance

  12. Anonymous says:

    Thank U.. Can u plz provide the Examples for the same

  13. Maruthi Reddy says:

    very interesting format sir. . .

  14. Anonymous says:

    very interesting format sir. . . .

  15. karthik says:

    Hi Joe,
    very good tutorial.
    can u plz. tell the difference between those implicit objects……

  16. srividya Reddy says:

    Itz very easy to uderstand……….

    ThanQ…..

  17. pranathi says:

    ur blog is very slow in your blog java material is more less comments is very may i think u prefare comments only

  18. Anonymous says:

    Short and Sweet information…
    thanks Joe…

  19. Anonymous says:

    Hi Joe, I am in my corporate training and from the day one, your blog has helped me a lot.thanks a ton !!

  20. Anonymous says:

    very nice and simple question…….so thanks

  21. RAJA RAO says:

    Shortcut to remember JSP implicit objects are
    SCOPE A RPR
    expand yourself each letter

  22. Raj says:

    hi joe,could u tell me ,how to create a hit counter to website,

  23. Ajay says:

    Very Nice explainations….Thanks sir..it helped a lot.

  24. Vikrant says:

    Awesome tutorials.There is nothing better than you on java on the web, esp. in explaining things as a teacher does.

  25. Anonymous says:

    Very helpful tutorials…
    Makes the concepts so easy to understand

  26. preeti says:

    i read your most of the articles ,it very nice

  27. [...] scope is very similar to HttpSession scope. Beans instantiated based on session scope scope lives through the HTTP session. Similar to [...]

  28. krish says:

    Hi,
    Can you please explaine me how we can access to our application…

    500
    /error-pages/servererror.jsp

  29. Surya says:

    Easy and understandable. Great. Thanks

  30. vijay says:

    thanks….

  31. shiva says:

    Hi Joe
    From the above topic i understood that implicit objects are mainly useful when we are writing the business logic. But wehave servlets already to do this task then why we need implicit objects in JSP.

  32. Ramanujulu says:

    thank you sir
    nice explanation

  33. Ahte says:

    nicely explianed…… joe

  34. jita says:

    Thanks joe for nice collection.

  35. manali says:

    nice explanation….

  36. Dinesh says:

    I used to refer your site for many of my doubts. Such a clear Explanation. Hats-off to you buddy

  37. K Padmanaban says:

    Hi sir,

    Your answer is very elaborative and true to the point.

    Thanks a lot

  38. kishore says:

    nice answer

  39. ramesh says:

    thank you sir

  40. Ghufran Ahmad says:

    great effort sir..huge output in minimum time…thanks a lot

  41. arjun panday says:

    thank you sir..

  42. Robin Bhargava says:

    Thanks a lot. For sharing this knowledge.

  43. Anonymous says:

    Very Helpfull

  44. AWADHESH ATULKAR says:

    Hi Joe,
    it’s fine to see such work…heartly salute to your hard work…But it would be much better if you have given us some examples also…

  45. Anonymous says:

    Hi Joe,
    it’s fine to see such work…heartly salute to your hard work…But it would be much better if you have given us some examples also…

  46. Anu says:

    Hi could anyone let me know if dere is any method to dynamically read the context path form the url?(preferring not to use httpservlet)

  47. Balaji says:

    I have never been able to Understand diff. between page and pageContext, and even config to some extent.For Example request.setAttribute(‘a’,a) can be get in as
    request.getAttribute(‘a’) in Next Page (After Request Dispatcher).

    I have been asked this in Many Interview Questions also…and none of my freinds also dont understand it clearly, everyone says this or that…like that,something like that etc………

    But None of the (Heck Break the barrier) can tell it clearly, pls explain it to me Clearly…pls explain me the difference with a small Real Time Example Sir.

  48. Vishnuvardhan says:

    Thanks Joe,

    You gave clear idea about all objects .It is very helpful to us.

  49. Aswini says:

    thaks for ur information sir…but i have a doubt in the line
    “The JSP implicit pageContext object is an instance of the javax.servlet.jsp.PageContext abstract class”
    how can one create an instance of an abstract class..

  50. khuhbu ajmera says:

    Thank you sir…it is easy to understand

  51. jyoti jajpuria says:

    thanks …its really helpfull.

  52. Surya says:

    It’s very useful to everyone(bingners/experience).Thank a lot to give clarity information…!!!!

  53. Ram says:

    Good Content.

  54. PRASHANT says:

    Thanks.
    add some more depth concepts in jsp.

  55. Padma says:

    Thank you Sir.
    we want some more depth concepts in jsp.

  56. Anonymous says:

    thanks.By using these implicit objects we want one example

  57. Anonymous says:

    thnx sir it is easy to understand.But if there were some example of these concept so it make more easy to understand for learner..

  58. Anonymous says:

    thanku sir….
    it is very easy to understand

  59. Anonymous says:

    thanku sir….
    it is very easy to understand

  60. bhanu says:

    Thank you Sir
    Its very easy to learn and understandable

  61. Sharad Jain says:

    Which implicit object is not available to JSP?
    a)Page
    b)Page context
    c)Session
    d)Exception

  62. Aswn Kumar S says:

    well, in two interviews they asked this Q.To be honest i didn’t know the answer,your blog is simple & understandable.

  63. Anonymous says:

    Thanks u sir …but i have a doubt …can i create my own implicit objects in jsp….if it is possible how to create my implicit objects

  64. praveen says:

    can u explain about page context in detail ?????

  65. praveen says:

    thnk u sir for u clear cut defination ..

    this defination set an image in my mind

  66. lukky says:

    its interprets in easy understandable format for every one, thanque

  67. madhavan says:

    Nice to read and understand

  68. Amit Kumar says:

    You wrote
    “The JSP implicit pageContext object is an instance of the javax.servlet.jsp.PageContext abstract class.”

    Kindly let me know how can an instance be created of abstract class?

    • Arvind Kumar Gangwar says:

      No, Abstract class never be instantaneous..we can’t create Abstract class instance.But every class have default constructor, so the class which extend Abstract class will be instantaneous.

  69. tiru says:

    HELLO ..

    If u don’t mind this is very Critical to read the letters on the Brown background

    Please change the background of the page The letters on the Panel are not visible

  70. PSG says:

    Thank u…

  71. Asha says:

    Can you please provide detailed description about config implicit object

  72. tt says:

    trc tyreuyi yutut

  73. venkat says:

    can u please any provide the detailed explanation about the pageContext

    Thanx in advance

  74. praveen rohal says:

    hi, can you please explain the internal working of “request” object.
    i have doubt regarding “request” whether it is httpServletRequest Interface reference var
    or
    it is class reference variable that implemented “httpServletRequest interface”

    ================let take an example=======
    i wanna to take username(textfield) in first.jsp and show it in second.jsp.

    now please let me know how it will work… how the code will compiled internally …

    please let me know i have searched a loot.. but not clear…

  75. Rahul says:

    Thankyou sir,

  76. Kirana says:

    very ez to understand…

  77. ashok says:

    thank u sir

  78. sundar says:

    nice sir thank u very much

  79. Dhanunjay Tanakanti says:

    Very nice… to help us

  80. sonu chaudhary says:

    thankyu sir because due to this my problem was solve in easy way,it is easy to understand and very helpfull for us…….

  81. Anonymous says:

    It’s is easy to understand and very helpful.
    Thanks a lot.

  82. mohan says:

    thank you very much its very simple and understandable format so its very useful for every one

  83. Sathya says:

    Thank you sir..

    ur ans really hepls us..:))

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