Wednesday, 20 June 2012

Result Types in struts 2.0

The dispatcher result type:

The dispatcher result type is the default type, and is used if no other result type is specified. It's used to forward to a servlet, JSP, HTML page, and so on, on the server. It uses the RequestDispatcher.forward() method.
We saw the "shorthand" version in our earlier examples, where we provided a JSP path as the body of the result tag.
<result name="success">
We can also specify the JSP file using a <param name="location"> tag within the <result...> element as follows:
<result name="success" type="dispatcher">
   <param name="location">
   </param >

The redirect result type:

The redirect result type calls the standard response.sendRedirect() method, causing the browser to create a new request to the given location.
We can provide the location either in the body of the <result...> element or as a <param name="location"> element. Redirect also supports the parse parameter. Here's an example configured using XML:
<action name="hello" class="com.tutorialspoint.struts2.HelloWorldAction" method="execute"> <result name="success" type="redirect"> <param name="location"> /NewWorld.jsp </param > </result> </action>
 Some more result type defined in default configirution is given as :

<package name="struts-default" abstract="true">
            <result-type name="chain" class="com.opensymphony.xwork2.ActionChainResult"/>
            <result-type name="dispatcher" class="org.apache.struts2.dispatcher.ServletDispatcherResult" default="true"/>
            <result-type name="freemarker" class="org.apache.struts2.views.freemarker.FreemarkerResult"/>
            <result-type name="httpheader" class="org.apache.struts2.dispatcher.HttpHeaderResult"/>
            <result-type name="redirect" class="org.apache.struts2.dispatcher.ServletRedirectResult"/>
            <result-type name="redirectAction" class="org.apache.struts2.dispatcher.ServletActionRedirectResult"/>
            <result-type name="stream" class="org.apache.struts2.dispatcher.StreamResult"/>
            <result-type name="velocity" class="org.apache.struts2.dispatcher.VelocityResult"/>
            <result-type name="xslt" class="org.apache.struts2.views.xslt.XSLTResult"/>
            <result-type name="plainText" class="org.apache.struts2.dispatcher.PlainTextResult" />

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