chandan

• Sep 22nd, 2007

 

Yes we can. doGet is a sub class while service is a super class. doGet overrides the service method.

sampra

 Profile Answers by sampra 

• Mar 4th, 2008

 

gv some satisfactory ans

dhruv_saksena

 Profile Answers by dhruv_saksena 

• Mar 15th, 2008

 

See the doGet() and doPost() methods are specefically meant for a servlet which extends HttpServlet which in itself extends GenericServlet class.

So whenever a request comes up firstly it goes to service() method which redirects it to doGet)( or doPost() method depending on the request i.e if it is get type request it will go to doGet() and if its kinda POST request it will go to doPost().

Dhruv

raghu.devata

 Profile Answers by raghu.devata 

• Apr 1st, 2008

 

See, any sub class of javax.servet.Servlet is considered as servlet, this Servlet Interface contains 3 life cycle methods (ofcourse 2 more methods r there) namely init(),service(),destroy().
API providing built in abstract class javax.servlet.GenericServlet with one abstract method service(), it provides basic implementation of all other methods. GenericServlet is protocol
independent, you can use these for your custom protocol also,  now comming to javax.servlet.http.HttpServlet. (which extends GenericServlet) this is for only http protocol, in this class service() method is implemented, internally service method will call doGet()/doPost()/doTrace()/doDelete()/doPut() etc. dependent on the http method.
coming to difference between doGet() and doPost... we should say it as diff b/w http get and post methods. the major difference is about security..

in
GET,
the param values (in a web form) will be appended at the address bar in browser, hence not secure
limit data can be sent through get,
it is idempotent,
this the default method (for html form)
efficient comparatively other methods like post.

whereas in POST
This is secure as it will not show the param values on address bar of browser
we can sent huge data through post method
it is non idempotent

initially every request reaches to service() method and depends on http method,
service method calls doGet()/doPost() etc...

gatadivaddavinod

 Profile Answers by gatadivaddavinod 

• Apr 18th, 2008

 

while desiging html page we are mentioning the method type whether it is a post are get.
 
    If we are using get method then we can override doget() method
    If we are using post method then we can override dopost() method

if we don't know which method we are using while designing a HTML page then we need to use service() method.

timmireddy

 Profile Answers by timmireddy Questions by timmireddy

• Jul 14th, 2008

 

Question not clearely defined,
Question ) What is difference b/w doGet() and doPost() method and can we override service() method by using doGet() and doPost() methods? 

Ans ) 1.by using doGet() method we can transport limited data( 255 chars), where by using doPost() method we can transfer unimited data.

2 ) the main difference b/n is that when you select GET as method in your form the data you pass from that JSP, will be appended to the URL with your servlet address.,where if you select POST then, any kind of data will not be appended to the URL., it will be passed directly (but u can not see appended data on the URL)

3 ) so, Security (SSL) is more in doPost() method as compare to doGet() method .

      sure every request first reaches to service() method and depends on http method, after service method calls doGet()/doPost() etc...

amit_9b

 Profile Answers by amit_9b 

• May 2nd, 2009

 

doGet() : Used for processing http requests of type GET
doPost() : Used for processing http requests of type POST
service() : The generic method. When a servlet is invoked, the service() method is invoked. The service method detects the http-request type and delegates the call to doGet(), doPost(), doTrace(), etc

Yes, we can override service() method, but then that will result in the same code being exected for all http-request types (get, post, trace, etc). So, this is not recommended.

sasikumarnp

 Profile Answers by sasikumarnp 

• Jul 25th, 2009

 

doGet and doPost are HttpServlet methods.
Service is the life cycle method of servlet.
Container invoke only the service method.
Service method invoke either doGet method or doPost method based on the client
request.
The client make a get request to the Servlet service method invoke doGet method
in the HttpServlet, the client make a post request the service method invoke
doPost method in the HttpServlet.
When using get request the form fields are appended into the requested URL, that
is called request query string. URL length is limited, we can't upload file
using get request.
When using post request the form fields are added into request body, we can also
upload a file using post request.

myogeshchavan97

 Profile Answers by myogeshchavan97 

• Jul 27th, 2009

 

Calling doGet() to doPost() and vise-versa is a good programming style.
When we want that the servlet should take the same action for both the get and post request then we use doGet() or doPost().

cutelove

 Profile Answers by cutelove 

• Sep 10th, 2009

 

We can call the doGet() method explicitly or implicitly.
In doPost() method we call only explicitly.

jitendrab31

 Profile Answers by jitendrab31 

• Sep 11th, 2009

 

We must override either doget or do post but we should not override the service method and leave this on HTTPservlet.

Delindia Fathima

• Dec 20th, 2011

 

Yes we can override the service method in our servlet class.

If we override the service method then we lose the functionality provided by the httpServlet class and doXXX() methods will not be called automatically.In our implementation, we have to determine which method is used and call the corresponding doXXX() method.

Source: SCWCDExamStudyKit

kishore

• May 9th, 2012

 

OK,but my question is... In HttpServlet class service method calls doGet() or doPost() method .Intead of overriding doGet() or doPost(),why should we not override service() method itself?????

sujata waghmare

• Jan 10th, 2014

 

yes..but our functionality may be loss..that why web continer... calling services() then services two type.first one is public service() and second one protected services()...public services method convert object of servletrquest and servletrespons object convert to httpservletrequest and httpservltresponse..send a protected services method resive object of httpservletrequest and httpservletresponse..then depend on send a doget and dopost...only doget method data transfer url throw and dopost data transfer body throw this i s different between....doget(),dopost(),services()....