which are the main packages to import while writing a strut app?

[maggie joseph]

Hi,
i am a newbie in struts ,was trying to execute a HelloWorld example using struts ,i have copied exactly the same example as it is,but it doent have the classes which are to be imported while executing the application..

i wrote a class

   package myServlets;

public class HelloWorldAction extends org.apache.struts.action.Action

{

private final static String SUCCESS = "success";

public ActionForward execute(ActionMapping mapping,ActionForm form,HttpServletRequest request,HttpServletResponse response) throws Exception

{
HelloWorldActionForm helloWorldForm = (HelloWorldActionForm) form;
helloWorldForm.setMessage("Hello World!");
return mapping.findForward(SUCCESS);
}




so i am getting errors like 
} 

HelloWorldAction.java:4: package org.apache.struts.action does not exist
public class HelloWorldAction extends org.apache.struts.action.Action
                                                              ^
HelloWorldAction.java:10: cannot find symbol
symbol  : class ActionMapping
location: class myServlets.HelloWorldAction
public ActionForward execute(ActionMapping mapping,ActionForm form,HttpServletRe
quest request,HttpServletResponse response) throws Exception
                             ^
HelloWorldAction.java:10: cannot find symbol
symbol  : class ActionForm
location: class myServlets.HelloWorldAction
public ActionForward execute(ActionMapping mapping,ActionForm form,HttpServletRe
quest request,HttpServletResponse response) throws Exception
                                                   ^
HelloWorldAction.java:10: cannot find symbol
symbol  : class HttpServletRequest
location: class myServlets.HelloWorldAction
public ActionForward execute(ActionMapping mapping,ActionForm form,HttpServletRe
quest request,HttpServletResponse response) throws Exception
                                                                   ^
HelloWorldAction.java:10: cannot find symbol
symbol  : class HttpServletResponse
location: class myServlets.HelloWorldAction
public ActionForward execute(ActionMapping mapping,ActionForm form,HttpServletRe
quest request,HttpServletResponse response) throws Exception

              ^
HelloWorldAction.java:10: cannot find symbol
symbol  : class ActionForward
location: class myServlets.HelloWorldAction
public ActionForward execute(ActionMapping mapping,ActionForm form,HttpServletRe
quest request,HttpServletResponse response) throws Exception
       ^
HelloWorldAction.java:13: cannot find symbol
symbol  : class HelloWorldActionForm
location: class myServlets.HelloWorldAction
HelloWorldActionForm helloWorldForm = (HelloWorldActionForm) form;
^
HelloWorldAction.java:13: cannot find symbol
symbol  : class HelloWorldActionForm
location: class myServlets.HelloWorldAction
HelloWorldActionForm helloWorldForm = (HelloWorldActionForm) form;
                                       ^
8 errors

kindly tell me what file am i missing and what do i do to import these files

[David Newton]

Import the classes that are missing.

If you're using an IDE this can be done automatically.

[maggie joseph]

i am trying to download struts from apache..
i am having all zip files...shall i download all the files and where should i locate them??
i downloaded Struts 2.1.8.1 release...

[David Newton]

Your code, however, is written for Struts 1--you should first decide which to use.

If you're asking about the general layout of a Java web app I'd recommend a tutorial or two first--do not start with Struts.

[Jaya Krishna]

Try this once.
include the following packages in your action class.

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;

[maggie joseph]

i tried executing the same program in IDE ,even after importing the packages i am getting compiler error on....

import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;

which jar files are required as executables for running this application???

when i say
public class HelloWorldAction extends org.apache.struts.action.Action

it give complier error on

org.apache.struts.action.Action

what am i missing??

thanks...

[David Newton]

The Struts 1 jars.

I'll repeat my question: are you trying to write a Struts 1 app, or a Struts 2 app? It makes a pretty big difference. Your code is for Struts 1.

[maggie joseph]

my problem is resolved i used one jar file for compiling called struts-core-1.3.10.jar and it compiled fine.........
now i have another doubt in the same application..i have written 2 classes one is dependent on another...
first is ....

  
package myServlets;

import myServlets.HelloWorldActionForm;...line 1
import javax.servlet.*;
import javax.servlet.http.*;
import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;

public class HelloWorldAction extends org.apache.struts.action.Action
{

private final static String SUCCESS = "success";

public ActionForward execute(ActionMapping mapping,ActionForm form,HttpServletRequest request,HttpServletResponse response) throws Exception
{
HelloWorldActionForm helloWorldForm = (HelloWorldActionForm) form;
helloWorldForm.setMessage("Hello World!");
return mapping.findForward(SUCCESS);
}
}  

second is

package myServlets;

import javax.servlet.*;
import javax.servlet.http.*;


public class  HelloWorldActionForm extends org.apache.struts.action.ActionForm {

private String message;

public HelloWorldActionForm() 
{
super();
}

public String getMessage()
{
return message;
}

public void setMessage(String message) {
this.message = message;
}
}    

when i compile both the servlets HelloWorldActionForm.java compiles well but HelloWorldAction gives complier error as follows

HelloWorldAction.java:4: cannot find symbol
symbol : class HelloWorldActionForm
location: package myServlets
import myServlets.HelloWorldActionForm;
^
HelloWorldAction.java:19: cannot find symbol
symbol : class HelloWorldActionForm
location: class myServlets.HelloWorldAction
HelloWorldActionForm helloWorldForm = (HelloWorldActionForm) form;
^
HelloWorldAction.java:19: cannot find symbol
symbol : class HelloWorldActionForm
location: class myServlets.HelloWorldAction
HelloWorldActionForm helloWorldForm = (HelloWorldActionForm) form;
^
3 errors

though i have written line 1..
what is my mistake....kindly reply..


thanks in advance...

[David Newton]

Looks like a classpath issue; your packages need to be on the classpath, just like the Struts 1 jar(s).

So you're actually trying to learn Struts 1? Is there a reason?

[maggie joseph]

i don know anything about struts...hence i started with struts one...then will go on with struts 2...what do you suggest?

thanks...

[David Newton]

Skipping Struts 1 unless you have a good reason to learn it.

[maggie joseph]

you mean its ok..if i skip struts 1 and directly start with struts 2....thanks...

[David Newton]

Yes; they're complete different.

[vijin das]

FIRST LEARN SERVLETS THEN JSP THEN TRY TO UNDERSTAND MVC ARCHITECTURE .....THEN TRY TO LEARN ANY MVC FRAMEWORK ...

[David Newton]

Please KeepItDown! :)