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Struts

Cannot retrieve mapping for action

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posted 19 years ago

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I am trying to get some sample struts code I got off the web to run.
I am using the resin webserver. I copied the struts-blank.war over. bounced resin. renamed it to 'myproject'.

I am getting:

The instructions say to put this jsp in the top level directory under myproject.

Here is my struts-config.xml. it is in myproject/WEB-INF

here is the web.xml the tutorial said to use

<?xml version="1.0" encoding="ISO-8859-1"?>
 
<!DOCTYPE web-app
  PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.2//EN"
  "http://java.sun.com/j2ee/dtds/web-app_2_2.dtd">
 
<web-app>
 
  
  <servlet>
    <servlet-name>action</servlet-name>
    <servlet-class>
  org.apache.struts.action.ActionServlet
</servlet-class>
    <init-param>
      <param-name>application</param-name>
      <param-value>ApplicationResources</param-value>
    </init-param>
    <init-param>
      <param-name>config</param-name>
      <param-value>/WEB-INF/struts-config.xml</param-value>
    </init-param>
    <init-param>
      <param-name>debug</param-name>
      <param-value>2</param-value>
    </init-param>
    <init-param>
      <param-name>detail</param-name>
      <param-value>2</param-value>
    </init-param>
    <init-param>
      <param-name>validate</param-name>
      <param-value>true</param-value>
    </init-param>
    <load-on-startup>2</load-on-startup>
  </servlet>
 
 
  
  <servlet-mapping>
    <servlet-name>action</servlet-name>
    <url-pattern>*.do</url-pattern>
  </servlet-mapping>
 
 
  
  <taglib>
    <taglib-uri>/WEB-INF/struts-bean.tld</taglib-uri>
    <taglib-location>/WEB-INF/struts-bean.tld</taglib-location>
  </taglib>
 
  <taglib>
    <taglib-uri>/WEB-INF/struts-html.tld</taglib-uri>
    <taglib-location>/WEB-INF/struts-html.tld</taglib-location>
  </taglib>
 
  <taglib>
    <taglib-uri>/WEB-INF/struts-logic.tld</taglib-uri>
    <taglib-location>/WEB-INF/struts-logic.tld</taglib-location>
  </taglib>
 
</web-app>

Ryan G Johnson

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posted 19 years ago

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sorry for the double post. I put this in JSP forum also. I just noticed the struts forum.

Merrill Higginson

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posted 19 years ago

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Change

<html:form action="submit.do">

to

<html:form action="submit">

in your JSP.

Merrill
Consultant, Sima Solutions

Ryan G Johnson

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posted 19 years ago

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when do you use .do ?

Merrill Higginson

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posted 19 years ago

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When you're specifying an action attribute inside a struts tag, as with <html:form> struts already knows you're referring to a Struts Action, so you don't want to append .do in this case.

When you call an action from the browser's URL line or from a non-struts tag, you're passing a URI to the App server that must be translated to a Struts action. The .do causes the URI to get referred to the struts ActionServlet where it can then call the appropriate Struts Action.

The answer to your question, then, is that you use the .do when calling an action from the URL line in the browser, or from a non-struts tag such as <a href="">.
[ January 19, 2006: Message edited by: Merrill Higginson ]

Merrill
Consultant, Sima Solutions

dnyan ginde

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posted 19 years ago

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I think it should work with "submit.do" too.

Amin Mohammed-Coleman

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posted 19 years ago

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Make sure your SubmitAction class extends Action. Can we see your Action class?

Ryan G Johnson

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i get the exact same error when i remove .do

Ryan G Johnson

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posted 19 years ago

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here is my submitAction class

submitForm

package hansen.playground;
 
import javax.servlet.http.HttpServletRequest;
import org.apache.struts.action.*;
 
public final class SubmitForm extends ActionForm {
 
  /* Last Name */
  private String lastName = "Hansen"; // default value
  public String getLastName() {
    return (this.lastName);
  }
  public void setLastName(String lastName) {
    this.lastName = lastName;
  }
 
  /* Address */
  private String address = null;
  public String getAddress() {
    return (this.address);
  }
  public void setAddress(String address) {
    this.address = address;
  }
 
  /* Sex */
  private String sex = null;
  public String getSex() {
    return (this.sex);
  }
  public void setSex(String sex) {
    this.sex = sex;
  }
 
  /* Married status */
  private String married = null;
  public String getMarried() {
    return (this.married);
  }
  public void setMarried(String married) {
    this.married = married;
  }
 
  /* Age */
  private String age = null;
  public String getAge() {
    return (this.age);
  }
  public void setAge(String age) {
    this.age = age;
  }
 
}

Ryan G Johnson

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posted 19 years ago

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could it have something to do with not being able to find my struts-config.xml? I did copy the struts-blank.war file and rename it.

C:\resin-2.1.11\webapps\myproject\WEB-INF\struts-config.xml

Ryan G Johnson

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posted 19 years ago

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Here is my jsp after merrill's changes.

Ryan G Johnson

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i bounced the webserver and now it works.

Ryan G Johnson

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Merrill-- you said that the .do made struts look for my action class?

I have a submitAction.class file in: C:\resin-2.1.11\webapps\myproject\WEB-INF\classes\hansen\playground

is my mapping setup wrong in my struts-config.xml ?

Merrill Higginson

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posted 19 years ago

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What I'm trying to get across is that passing a URI that ends in .do to the App Server causes the struts ActionServlet to be invoked. Here is the code in web.xml that makes this happen:

Once inside the Struts ActionServlet, Struts will then use the rest of the URI to determine which Action class to invoke. It does this by comparing the URI to the Action Mappings you've defined in struts-config.xml.

It's different, though, when you're using a Struts custom tag, such as <html:form>. The action atribute of this tag is expecting a Struts action mapping exactly as you have defined it in struts-config.xml. There is no action mapping for "/submit.do" in your xml file, and that's why it didn't work.

The principle here is that you use /myAction.do when passing a url in from the browser or from a link, and you use /myAction inside a Struts custom tag such as <html:form>

I'm a bit confused, though. You said it's working, right? If it's working, that means you set up your struts-config.xml file properly.
[ January 20, 2006: Message edited by: Merrill Higginson ]

Merrill
Consultant, Sima Solutions