Struts 2 getRequestDispatcher forward to *.action

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Q1tum - 19 Jun 2007 13:32 GMT

Hi all,

I hope this is the right place to ask this question.

I'm started learning JSP / Java and need some advice regarding an
issue.

I created a tutorial project which makes use of the following:

- Maven (as local server)
- Struts 2
- Freemarker (template engine)
This is (a part) of my web.xml:

<web-app>

................
................

<servlet>
<servlet-name>LoginService</servlet-name>
<servlet-class>tutorial.services.LoginService</servlet-class>
</servlet>

<servlet-mapping>
<servlet-name>LoginService</servlet-name>
<url-pattern>/LoginService.do</url-pattern>
</servlet-mapping>

</web-app>

-------------------------------

This is my struts.xml:

<struts>
    <package name="tutorial" extends="struts-default">
        <action name="index" class="indexAction">
            <result type="freemarker">/ftl/index.ftl</result>
        </action>

        <action name="login*" method="{1}" class="loginAction">
            <result name="input" type="redirect-action">index</result>
            <result name="success" type="redirect-action">home</result>
        </action>

        <action name="home">
            <result type="freemarker">/ftl/home.ftl</result>
        </action>
    </package>
</struts>

-------------------------------

Login Action (tutorialSupport extends ActionSupport):

package tutorial.actions;

import tutorial.comon.tutorialSupport;
import tutorial.dao.UserDAO;
import tutorial.vo.UserVO;

import com.opensymphony.xwork2.conversion.annotations.Conversion;

public class loginAction extends tutorialSupport {

    private String login = null;
    private String password = null;

public String execute() throws Exception {
String result = INPUT;

UserDAO userDAO = new UserDAO();

UserVO userVO = userDAO.getUserByLogin(login, password);

if( userVO != null) {
     result = SUCCESS;
}

return result;
}

    public String getLogin() {
        return login;
    }

    public void setLogin(String login) {
        this.login = login;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }
}

-------------------------------

index.ftl (FreeMarker template file):

<html>
..........
..........

<@s.form action="LoginService.do" method="post">
    <@s.textfield label="Login" name="login" />
    <@s.password label="Password" name="password" />
    <@s.submit />
</@s.form>

..........
..........
</htm>

-------------------------------

LoginService.java:

package tutorial.services;

import java.io.IOException;

import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import tutorial.dao.UserDAO;
import tutorial.vo.UserVO;

public class LoginService extends HttpServlet {

    protected void doPost( HttpServletRequest request,
HttpServletResponse response)
        throws ServletException, IOException {

        UserDAO userDAO = new UserDAO();

        UserVO userVO =
userDAO.getUserByLogin( request.getParameter("login") ,
                request.getParameter("password") );
        if( userVO == null ) {
            request.setAttribute("error", "login");
            request.getRequestDispatcher("/login.action").forward(request,
response);
        }

        else {
            HttpSession httpSession = request.getSession(true);
            httpSession.setAttribute("userVO", userVO);

            request.getRequestDispatcher("/home.action").forward(request,
response);
        }
    }
}

--------------------

Problem:

When I submit the form, LoginService is called, lets assume my login
was incorrect, as soon as it gets to this line:

request.getRequestDispatcher("/login.action").forward(request,
response);

I get the following error:

#Start of the Error:

HTTP ERROR: 404

NOT_FOUND

RequestURI=/tutorial/login.action

#End of the Error

If I would replace request.getRequestDispatcher("/
login.action").forward(request, response); with
request.getRequestDispatcher("/login.jsp").forward(request, response);
or something, then it will find the page but I'm not using the Action
class anymore then.

I hope I made my problem clear, my questions are:

1. Why can't I forward to any action?
2. Is this the logical way of handling forms, actions etc.
3. Any other suggestions or remarks?

Thanks and regards,

Arno

Reply to this Message

Q1tum - 21 Jun 2007 15:36 GMT

> Hi all,
>
[quoted text clipped - 198 lines]
>
> Arno

request.getRequestDispatcher("/home.action").forward(request,
response); can only forward to .jsp files.

Reply to this Message

Lew - 21 Jun 2007 15:51 GMT

> request.getRequestDispatcher("/home.action").forward(request,
> response); can only forward to .jsp files.

That is simply not true.
<http://java.sun.com/j2ee/1.4/docs/api/javax/servlet/ServletRequest.html#getReque
stDispatcher(java.lang.String)>

> Returns a RequestDispatcher object that acts as a wrapper for the resource located at the given path. A RequestDispatcher object can be used to forward a request to the resource or to include the resource in a response. The resource can be dynamic or static.

Signature

Lew

Reply to this Message

Struts 2 getRequestDispatcher forward to *.action

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