Struts struts-config.xml action-mapping explained

问题

I am a noob to Struts framework. I am trying to understand how action-mapping works exactly. Suppose I have a JavaScript file that sends an AJAX request:

$("button").click(function(){
    $.ajax({url: "myTestUrl.do", success: function(result){
        //do something with result
    });
});

and my struts-config.xml file looks like this:

<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE struts-config PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 1.1//EN" "http://jakarta.apache.org/struts/dtds/struts-config_1_1.dtd">
<struts-config>
    <form-beans>
        <form-bean name="testForm" type="com.test.TestForm"/>       
    </form-beans>

    <!-- Global Forwards -->    
    <global-forwards>
    </global-forwards>

    <!-- Action Mappings -->
    <action-mappings>

        <action path="/myTestUrl" 
                type="com.test.TestAction" 
                name="testForm" 
                scope="request" />

    </action-mappings>
    <controller locale="true"/>
</struts-config>

I don't understand the relationship between the action and the form-bean. Will my request be handled by TestAction? If so, what is the purpose of the form bean type attribute?

UPDATE:

For anyone who needs a great overview of struts MCV framework check out this link: http://www.javaranch.com/journal/2002/03/newslettermar2002.jsp#struts

回答1:

The relationship is made by the name attribute in the action config. So if you use name="testForm" then form bean with the name testForm will be injected to the action's execute method.

Your request might be handled if the relative url match the path value in action config and you have mapped the action servlet to *.do in servlet mapping pattern.

The type attribute of the <form-bean> is used to enter FQCN of the bean class that would probably extend the ActionForm. It's needed by Struts to be able to instantiate a bean when required.

来源：https://stackoverflow.com/questions/36458341/struts-struts-config-xml-action-mapping-explained

标签

struts-1

struts-config