An EAR file could have multiple WAR files. Each of them is a Web application. There are no standard way to communicate between two Web applications.
However, ZK supports a way to reference the resource from another Web applications. For example, assume you want to include a resource, say /foreign.zul, from another Web application, say app2. Then, you could do as follows.
Similarly, you could reference resources from another Web application.
<style src="~app2/foo.css"/> <!-- assume foo.css is in the context called app2 --> <image src="~/foo.png"/> <!-- assume foo.png is in the root context -->
Note: Whether you can access a resource located in another Web application depends on the configuration of the Web server. For example, you have to specify crossContext="true" in conf/context.xml, if you are using Tomcat.
Web Resources from Classpath
With ZK, you could reference a resource that is locatable by the classpath. The advantage is that you could embed Web resources in a JAR file, which simplifies the deployment.
Then, it tries to locate the resource, /my/jar.gif, at the /web directory by searching resources from the classpath.
There are three ways to place file in classpath.
Under java src folder
web folder under
~. will search src/web. For example
src/web/my/jar.gif can be found by
Under WebContent folder
WebContent/WEB-INF folder. For example
WebContent/WEB-INF/classes/web/my/jar.gif can be found by
Jar the file
You may jar the resource and place it under
WebContent/WEB-INF/lib folder. For
<image src="~./my/jar.gif"/>, the file should be under
web/my/jar.gif inside the jar file.