1 plugin.xml

<?xml version="1.0" encoding="UTF-8"?>
<?eclipse version="3.4"?>
<plugin><!-- 定义命令 --><extension point="org.eclipse.ui.commands"><command id="HelloWorldPlugin.commands.helloCommand" name="测试"></command></extension><!-- 定义右键菜单 --><extension point="org.eclipse.ui.menus"><menuContribution locationURI="popup:org.eclipse.ui.popup.any"><command commandId="HelloWorldPlugin.commands.helloCommand" label="测试" style="push"></command></menuContribution></extension><!-- 定义命令处理器 --><extension point="org.eclipse.ui.handlers"><handler class="com.xu.work04.handlers.SampleHandler" commandId="HelloWorldPlugin.commands.helloCommand"></handler></extension></plugin>

2 SampleHandler.java

package com.xu.work04.handlers;import org.eclipse.core.commands.AbstractHandler;
import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.ui.IWorkbenchWindow;
import org.eclipse.ui.handlers.HandlerUtil;
import org.eclipse.jface.dialogs.MessageDialog;public class SampleHandler extends AbstractHandler {@Overridepublic Object execute(ExecutionEvent event) throws ExecutionException {IWorkbenchWindow window = HandlerUtil.getActiveWorkbenchWindowChecked(event);MessageDialog.openInformation( window.getShell(), "Work04", "右击菜单弹出框！");return null;}}

3 Activator.java

package com.xu.work04;import org.eclipse.ui.plugin.AbstractUIPlugin;
import org.osgi.framework.BundleContext;/*** The activator class controls the plug-in life cycle*/
public class Activator extends AbstractUIPlugin {// The plug-in IDpublic static final String PLUGIN_ID = "com.xu.work04"; //$NON-NLS-1$// The shared instanceprivate static Activator plugin;/*** The constructor*/public Activator() {}@Overridepublic void start(BundleContext context) throws Exception {super.start(context);plugin = this;}@Overridepublic void stop(BundleContext context) throws Exception {plugin = null;super.stop(context);}/*** Returns the shared instance** @return the shared instance*/public static Activator getDefault() {return plugin;}}