Programming Tutorials

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Creating Struts Modules

By: Henry in Struts Tutorials on 2007年09月22日 [フレーム]

The objective of this tutorial is to teach how to create Struts application modules and break monolithic struts module into pieces

1. If you already have a Struts application, then this tutorial will show you how to add a new module to your existing application.

2. The index page belongs to the default module. From the index page, we will provide a link to go
to module2. Module 2 will consist of a two dummy pages that can call each other and also have a
link to return to default module.


 
 Change the web.xml to define a new module named xyz as
follows:


<init-param>

<param-name>config/xyz</param-name>

<param-value>/WEB-INF/struts-config-xyz.xml</param-value>

</init-param>


 
 Copy over the struts-config.xml to create a new struts-config-xyz.xml

 
 Create a empty XYZ Message Resources

 
 Clean up the struts-config-xyz.xml to retain only empty
blocks for form-beans, action

mappings etc. Add the message resource bundle definition to struts-config-xyz.xml.

 
 Add SwitchAction to struts-config.xml & struts-config-xyz.xml
as follows:


<action path="/switch"
type="org.apache.struts.actions.SwitchAction"/>


 
 Create a folder called xyz under the src/web directory.
Create two jsps: xyz-page1.jsp & xyzpage2.jsp (Copy over index.jsp & change contents)

 
 Add bean:message for titles and define them in
XYZMessageResources

 
 In xyz-page1.jsp, add link to navigate to xyz-page2.jsp
(Forward Action via html:link)

 
 In xyz-page2.jsp, add link to navigate to xyz-page1.jsp
(Forward Action via html:link)

 
 In index.jsp, a link is added to go to xyz-page1.jsp in xyz
module as follows:


<html:link forward="gotoXYZModule">Go
to XYZ Module</html:link>


 
 In xyz-page1.jsp, add a link to go to index.jsp in default
module


<html:link forward="gotoDefaultModule">Go
to Default Module</html:link>


 
 Add global forward in struts-config.xml to go to
xyz-page1.jsp


<forward name="gotoXYZModule"

path="/switch.do?page=/page1.do&amp;prefix=/xyz"
/>


 
 Add global forward in struts-config-xyz.xml to go to
index.jsp


<forward name="gotoDefaultModule"

path="/switch.do?page=/showCustomerSearchForm.do&amp;prefix="/>