Windows下使用SWT调用ActiveX控件

最近因项目需要测试一些ActiveX控件的功能，使用原生工具笨重且比较慢，错误跟踪也不太方便，决定使用Eclipse的SWT尝试一番，最后发现果然比较便捷。这里根据网上某大神的用例来构建一个工具类。

package com.xxx.yyy;

import org.eclipse.swt.SWT;
import org.eclipse.swt.ole.win32.OleAutomation;
import org.eclipse.swt.ole.win32.OleControlSite;
import org.eclipse.swt.ole.win32.OleFrame;
import org.eclipse.swt.ole.win32.OleListener;
import org.eclipse.swt.ole.win32.Variant;
import org.eclipse.swt.widgets.Shell;

public class ActiveXUtil {
	private Shell _shell;
	private OleFrame _frame;
	private OleControlSite _site;
	private OleAutomation _auto;

	public Shell getShell() {
		return _shell;
	}

	public OleFrame getFrame() {
		return _frame;
	}

	public OleControlSite getSite() {
		return _site;
	}

	public OleAutomation getAuto() {
		return _auto;
	}

	public int doVerb(int verb) {
		return _site.doVerb(verb);
	}
	
	ActiveXUtil(String activexId, OleControlSite site, Shell shell) {
		if (site == null) {
			_shell = (shell == null ? new Shell() : shell);
			_frame = new OleFrame(_shell, SWT.NONE);
			_site = new OleControlSite(_frame, SWT.NONE, activexId);
			_auto = new OleAutomation(_site);
		} else {
			_site = site;
			_auto = new OleAutomation(site);
		}
	}

	public int getID(String name) {
		try {
			int[] ids = _auto.getIDsOfNames(new String[] { name });
			if (ids.length >= 0)
				return ids[0];
		} catch (RuntimeException e) {
			e.printStackTrace();
		}
		return -1;
	}

	public Variant[] createVariants(String[] paras) {
		Variant[] vr = new Variant[paras.length];
		for (int i = 0; i < paras.length; i++) {
			vr[i] = new Variant(paras[i]);
		}
		return vr;
	}

	public Variant getProperty(String prop) {
		int propId = getID(prop);
		Variant v = null;
		try {
			v = _auto.getProperty(propId);
		} catch (Exception e) {
			e.printStackTrace();
		}
		return v;
	}

	public void setProperty(String name, String... params) {
		int propId = getID(name);
		if (propId < 0)
			return;
		if (params.length == 1)
			_auto.setProperty(propId, new Variant(params[0]));
		else {
			Variant[] vs = new Variant[params.length];
			int i = 0;
			for (String param : params) {
				vs[i] = new Variant(param);
				i++;
			}
			_auto.setProperty(propId, vs);
		}
	}

	public void setProperty(String name, Variant... params) {
		int propId = getID(name);
		if (propId < 0)
			return;
		_auto.setProperty(propId, params);
	}

	public Variant execute(String methodName, Variant... params) {
		int mid = getID(methodName);
		if (mid < 0)
			return null;
		Variant rtnv;
		if (params == null)
			rtnv = _auto.invoke(mid);
		else
			rtnv = _auto.invoke(mid, params);
		return rtnv;
	}

	public Variant execute(String methodName) {
		int mid = getID(methodName);
		if (mid < 0)
			return null;

		Variant rtnv = _auto.invoke(mid);
		return rtnv;
	}

	public void addEventListener(int eventID, OleListener listener) {
		_site.addEventListener(eventID, listener);
	}

	public void removeEventListener(int eventID, OleListener listener) {
		_site.removeEventListener(eventID, listener);
	}

}

使用工具类的方法如下：

package com.xx.yy;

import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.layout.RowLayout;
import org.eclipse.swt.ole.win32.OLE;
import org.eclipse.swt.ole.win32.OleEvent;
import org.eclipse.swt.ole.win32.OleListener;
import org.eclipse.swt.ole.win32.Variant;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;

public class SwtMainWindow {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		// 设置应用标题
		Display display = Display.getDefault();
		Shell shell = new Shell();
		shell.setSize(800, 660);
		shell.setLayout(new RowLayout());
		shell.setText("某某测试程序(SWT)");

		// 初始化ActiveX控件
		ActiveXUtil util = new ActiveXUtil("{04655FF8-9979-4FFA-8F77-C3A539EA7370}", null, shell);//这里可以是ClassID，也可以是AppID，用OLE-COM Object Viewer注册表中都能找到
		util.getFrame().setSize(shell.getClientArea().width, shell.getClientArea().height);
		util.doVerb(OLE.OLEIVERB_SHOW);
                
                //监听事件
		final int nEventXXX = 1;// 某事件ID，使用工具查看事件的DispatchID
		util.addEventListener(nEventXXX, new OleListener() {
			@Override
			public void handleEvent(OleEvent event) {
				// TODO Auto-generated method stub
				System.out.println(event.arguments[0].getString());
			}
		});
		
		// 调用方法
		Button button1 = new Button(shell, SWT.PUSH);
		button1.setText("CallMethod");
		button1.addSelectionListener(new SelectionAdapter() {
			public void widgetSelected(SelectionEvent e) {
				Variant result = util.execute("SomeMethod", new Variant(
						"Parameter Value"));
				if (result == null) {
					System.out.println("ActiveX method failure!");
				}
			}
		});

		// 显示窗口
		shell.setSize(800, 700);
		shell.open();
		shell.layout();

		while (!shell.isDisposed()) {
			if (!display.readAndDispatch()) {
				display.sleep();
			}
		}
	}

}