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sandeep Talari
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Joined: Dec 24, 2007
Posts: 63
<url-pattern> *.do</url-pattern> .

the url-pattern what we give, the client will request on the web browser. I'm little bit confused about *.do .what does it mean.
James Ellis
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Joined: Oct 14, 2004
Posts: 205
You should clarify your question, but I'll try and guess at what you're after.

Developers of servlets often name their servlets whatever they want. For instance you could have a servlet named GetWeatherServlet, that an end user could access via getWeather.do or weather.do or whatever you won't to call it. You would define these mappings in web.xml. Example:



You don't have to call it ".do" however, you could call it whatever you want as long as it matches the user's request.
Steve Luke
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Joined: Jan 28, 2003
Posts: 4181
    
  21

Originally posted by sandeep Talari:
<url-pattern> *.do</url-pattern> .

the url-pattern what we give, the client will request on the web browser. I'm little bit confused about *.do .what does it mean.


And for that specific case, it means all requests for the given context that in the three characters ".do" will invoke this Servlet. So if you web app is located at:
http://my.domain.com/MyApp/
Then all of the following URLs will go to the servlet mapped to *.do:
http://my.domain.com/MyApp/weather.do
http://my.domain.com/MyApp/ornot.do
http://my.domain.com/MyApp/secret/secret.do
http://my.domain.com/MyApp/under/where/.do

But these won't:
http://my.domain.com/MyApp/GetWeather
http://my.domain.com/MyApp/.do/SomeThing (at least I don't think this will)
http://my.domain.com/MyApp/index.jsp
http://my.domain.com/MyApp/Some/Where/overTheRainbow.gif

The *.do is usually a mapping for a single Controller Servlet that uses parameters and the values before the ".do" signifier to determine what to do. It is a central concept to many MVC frameworks like JSF and Struts.


Steve
Bear Bibeault
Author and ninkuma
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Bear Bibeault
Author and ninkuma
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Joined: Jan 10, 2002
Posts: 61598
    
  67

The .do is a convention (rather clumsy, I think) of Struts 1 apps. As pointed out, URL mappings can take many forms. This is not a good one to follow should you not be using Struts 1.
 
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