Need help to understand Spring MVC tutorial

Let me know !!

I understood nothing from your comment.

please see the web.xml and  dispatcher-servlet.xml  in the tutorial.

welcomePage.jsp  is not written anywhere.

one more thing ..this is any view ...need not be so called welcome page !

And also ..

in the tutorial it says , DispatcherServlet   invokes the HelloWorldController ...But if there were multiple controller like  say  HelloWorldController-2 , HelloWorldController-3 etc exists  then how does  DispatcherServlet  will decide which controller to call ? what is the deciding factor here ?

>>U can define welcome page in web.xml file

Yea..i know that ...but what I was trying to say is how come they showing   welcomePage.jsp without mentioning it in web.xml ?


please download the source code attached in the tutorial....and see the web.xml and  dispatcher-servlet.xml .....there is no   welcomePage.jsp  in web.xml  but still they are displaying it . How its picked up ?

<<<<<Yea..i know that ...but what I was trying to say is how come they showing   welcomePage.jsp without mentioning it in web.xml ?

y u think like that ??

u can give any name to jsp right  ? thats what they did !!!

<<<< there is no   welcomePage.jsp  in web.xml  but still they are displaying it

1. Ur giving <url-pattern>*.htm</url-pattern> like this so dispatcher servlet what ever u give that will take as *.htm only

2. <property name="suffix">
07.        <value>.jsp</value>
08.    </property>

here ur metion that all page have suffix .jsp so no need to metion the jsp page.....

3.return new ModelAndView("welcomePage","welcomeMessage", message);

here the metion welcomePage so its take it as welcomePage.jsp .... and go to the page...


i think u will get the point !!

redirect.jsp has redirected to welcome.htm (that mean welcomePage.jsp)

>>u can give any name to jsp right  ? thats what they did !!!

I think we are in a misunderstanding.

please download this working  WAR file they are using for this tutorial

http://www.vaannila.com/examples/spring/example/SpringExample5.war



They say when they invoke   http://localhost:8080/SpringExample5/welcome.htm
They get   "Hello World !"


Now tell, how this view is coming ? I'd like to listen your comments on this.


I checked this WAR file and found that  welcomePage.jsp   can produce "Hello World !"

but nowhere in  the XML this page has not been mentioned. ...thats exactly I am worried about.

Do u read my previews command clearly ??????

same as i telling..............

Feeling comfortable now.

Still have one doubt  .

I'm worried about the HelloWorldController   execution flow .

Inside  HelloWorldController ,  It seems to me that  first   "setMessage"  is Injected and then it returns "ModelAndView "  so that  "InternalResourceViewResolver" can find  the jsp page with the injected welcome message.

is that correct ? Can you put some comments on this flow ?


import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.AbstractController;

   public class HelloWorldController extends AbstractController {

    private String message;
   
    @Override
   protected ModelAndView handleRequestInternal(HttpServletRequest request, HttpServletResponse response) throws Exception {
       return new ModelAndView("welcomePage","welcomeMessage", message);
   }
   
     public void setMessage(String message) {
       this.message = message;
   }

}

<<<<<< is that correct ? Can you put some comments on this flow ?

Yes ur right. U can give string value there !! (Bcz message is String object )