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位置	locationURI	备注
菜单栏	menu:org.eclipse.ui.main.menu	添加到传统菜单
工具栏	toolbar:org.eclipse.ui.main.toolbar	添加到工具栏

style 值	含义	显示效果
push	普通按钮（默认）	普通的点击按钮，点一下执行一次
toggle	切换按钮	有按下/弹起两种状态，比如"开关"
radio	单选按钮	多个按钮互斥选择，比如 “模式切换”

1 增加工具(push)

package com.xu.learn.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(),"Learn","点击菜单弹框");return null;}
}

在<?xml version="1.0" encoding="UTF-8"?>
<?eclipse version="3.4"?>
<plugin><extension point="org.eclipse.ui.menus"><menuContribution locationURI="toolbar:org.eclipse.ui.main.toolbar"><toolbar id="com.example.toolbar"><command commandId="com.example.commands.helloCommand" icon="icons/sample.png" tooltip="点我执行命令" label="按钮名称" style="push"></command></toolbar></menuContribution></extension><extension point="org.eclipse.ui.handlers"><handler class="com.xu.learn.handlers.SampleHandler" commandId="com.example.commands.helloCommand"></handler></extension></plugin>

2 增加工具(toggle)

package com.xu.learn.handlers;import org.eclipse.core.commands.AbstractHandler;
import org.eclipse.core.commands.Command;
import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.jface.commands.ToggleState;
import org.eclipse.jface.preference.IPreferenceStore;
import org.eclipse.ui.handlers.HandlerUtil;public class ToggleHandler extends AbstractHandler {private static final String STATS = "org.eclipse.ui.commands.toggleState";private static IPreferenceStore preferenceStore;public static void setPreferenceStore(IPreferenceStore store) {preferenceStore = store;}@Overridepublic Object execute(ExecutionEvent event) throws ExecutionException {Command command = event.getCommand();// 获取状态ToggleState state = (ToggleState) command.getState(STATS);if (state == null) {state = new ToggleState();command.addState(STATS, state);}// 打印状态boolean currentState = HandlerUtil.toggleCommandState(command);System.out.println("当前按钮状态：" + currentState);// 保存状态if (preferenceStore != null) {preferenceStore.setValue(STATS, currentState);}return null;}}

<?xml version="1.0" encoding="UTF-8"?>
<?eclipse version="3.4"?>
<plugin><extension point="org.eclipse.ui.commands"><command id="com.example.commands.toggleCommand" name="切换按钮命令"/></extension><extension point="org.eclipse.ui.handlers"><handler class="com.xu.learn.handlers.ToggleHandler" commandId="com.example.commands.toggleCommand"/></extension><extension point="org.eclipse.ui.menus"><menuContribution locationURI="toolbar:org.eclipse.ui.main.toolbar"><toolbar id="com.example.toolbar"><command commandId="com.example.commands.toggleCommand" icon="icons/sample.png" style="toggle" tooltip="开关按钮示例"/></toolbar></menuContribution></extension></plugin>

3 增加工具(radio)

package com.xu.learn.handlers;import org.eclipse.core.commands.AbstractHandler;
import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.core.commands.ExecutionException;public class RadioHandler extends AbstractHandler {@Overridepublic Object execute(ExecutionEvent event) throws ExecutionException {// 拿到参数String option = event.getParameter("option");System.out.println("当前选中的Radio按钮是：选项 " + option);// 这里可以根据 option 做不同处理if ("1".equals(option)) {// 选中了第一个} else if ("2".equals(option)) {// 选中了第二个} else if ("3".equals(option)) {// 选中了第三个}return null;}
}

<?xml version="1.0" encoding="UTF-8"?>
<?eclipse version="3.4"?>
<plugin><extension point="org.eclipse.ui.commands"><command id="com.example.commands.radioCommand" name="单选按钮命令"><commandParameter id="option" name="选项" optional="true"/></command></extension><extension point="org.eclipse.ui.handlers"><handler class="com.xu.learn.handlers.RadioHandler" commandId="com.example.commands.radioCommand"/></extension><extension point="org.eclipse.ui.menus"><menuContribution locationURI="toolbar:org.eclipse.ui.main.toolbar"><toolbar id="com.example.toolbar"><command commandId="com.example.commands.radioCommand" icon="icons/sample.png" label="选项1" style="radio"><parameter name="option" value="1"/></command><command commandId="com.example.commands.radioCommand" icon="icons/sample.png" label="选项2" style="radio"><parameter name="option" value="2"/></command><command commandId="com.example.commands.radioCommand" icon="icons/sample.png" label="选项3" style="radio"><parameter name="option" value="3"/></command></toolbar></menuContribution></extension></plugin>