JavaFx 2.0 application referencing external jars

问题:

I'm developing a JavaFx 2.0 application using Netbeans 7. The main application references another class library project added by rightclicking the 'Libraries' folder and selecting 'Add Project...'. Executing the application from netbeans works fine.

When deploying it to a jar file by 'Clean and build' and trying to execute it via console with

java -jar TestApp.jar

I get

Exception in thread "JavaFX-Launcher" java.lang.NoClassDefFoundError: net/pmoule/SomeClass
...

The dist/lib folder of my application contains the referenced library. So IMHO everything should be fine. Looking at the Manifest.MF contained in my application jar I get this

Manifest-Version: 1.0
Ant-Version: Apache Ant 1.8.2
Created-By: 1.6.0_23-b05 (Sun Microsystems Inc.)
Implementation-Vendor: pmoule
Implementation-Title: TestApp
Implementation-Version: 1.0
Main-Class: com/javafx/main/Main
JavaFX-Application-Class: testapp.TestApp
JavaFX-Version: 2.0

Where is my class path? How do I get Netbeans to add the correct classpath?

I tried adding it manually to the Manifest.MF by editing the one contained in the jar

Manifest-Version: 1.0
Ant-Version: Apache Ant 1.8.2
Created-By: 1.6.0_23-b05 (Sun Microsystems Inc.)
Implementation-Vendor: pmoule
Implementation-Title: TestApp
Implementation-Version: 1.0
Class-Path: lib/MyLib.jar        //THIS IS NEW
Main-Class: com/javafx/main/Main
JavaFX-Application-Class: testapp.TestApp
JavaFX-Version: 2.0

No success and same error.

All samples delivered with the JavaFX 2.0 SDK work by doubleclicking in WindowsExplorer or from the console by entering e.g.

java -jar PathAnimation.jar

But not any of these examples makes a reference to an external jar.

Some research lead me to this question: Netbeans JavaFX 2.0 Application But without any solution so far.

Thanks for any help!

回答1:

Found a working solution by myself.

All the external libraries in the dist/lin folder had a size of 0kb. So the exception was correct, of course.

To get my application running I did the following in the project's jfx-impl.xml:

Add the classpath to manifest.mf

<fxjar destfile="${jfx.deployment.dir}/${jfx.deployment.jar}" applicationClass="${main.class}" >
             <fileset dir="${build.classes.dir}"/>
              <manifest>
               <attribute name="Implementation-Vendor" value="${application.vendor}"/>
               <attribute name="Implementation-Title" value="${application.title}"/>
<!-- NEW -->   <attribute name="Class-Path" value="${jar.classpath}"/> <!-- NEW -->
               <attribute name="Implementation-Version" value="1.0"/>
              </manifest>
    </fxjar>

Create an output dir for web deployment

<property name="jfx.deployment.web.dir" location="${jfx.deployment.dir}/web" />
<mkdir dir="${jfx.deployment.web.dir}" />

Set output dir for fxdeploy task

<fxdeploy width="${jfx.applet.width}" height="${jfx.applet.height}"
              outdir="${jfx.deployment.web.dir}" <!-- NEW DIR -->
              embedJNLP="true"
              outfile="${application.title}">
        <info title="${application.title}"
              vendor="${application.vendor}"/>
        <application name="${application.title}"
                     appclass="${main.class}"/>
        <resources type="eager">
           <fileset dir="${jfx.deployment.web.dir}"> <!-- NEW DIR -->
              <include name="${jfx.deployment.jar}"/>
              <include name="lib/*.jar"/>
              <exclude name="**/jfxrt.jar"/>
           </fileset>
        </resources>
</fxdeploy>

Now, I can deploy my desktop application and execute ist via doubleclick from windows explorer or by entering

java -jar TestApp.jar

There still exists some issue with the content of my newly created web-dir.

1. The TestApp.jar ist not copied zo dist/web
2. The referenced external jars are not copied to dist/web

This is fine for me and will be fixed some time later.

Hope this helps anyone else.

回答2:

In Netbeans, under project => properties => Build => Packaging, did you check "Copy Dependent Libraries" ?

回答3:

You need to tell the fx:jar task what your classpath dependencies are:

<fxjar destfile="${jfx.deployment.dir}/${jfx.deployment.jar}" applicationClass="${main.class}" >
      <fileset dir="${build.classes.dir}"/>
      <manifest>
        <attribute name="Implementation-Vendor" value="${application.vendor}"/>
        <attribute name="Implementation-Title" value="${application.title}"/>
        <attribute name="Implementation-Version" value="1.0"/>
      </manifest>

      <!-- Setup the classpath for the generated .jar here -->
      <fx:resources>
        <fx:fileset type="jar" dir="lib" includes="MyLib.jar"/>
      </fx:resources>
</fxjar>

You also need to use fx:resources tag in your fx:deploy task instead of just resources. That should resolve the last two problems left in your answer.