JACOB一个Java-COM中间件.通过这个组件你可以在Java应用程序中调用COM组件和Win32程序库。

示例代码：

import com.ms.com.*;
import com.ms.activeX.*;

public class DispatchTest
{
 public static void main(String[] args)
 {
 ActiveXComponent xl = new ActiveXComponent(\"Excel.Application\");
 Object xlo = xl.getObject();
 try {
 System.out.println(\"version=\"+xl.getProperty(\"Version\"));
 System.out.println(\"version=\"+Dispatch.get(xlo, \"Version\"));
 xl.setProperty(\"Visible\", new Variant(true));
 Object workbooks = xl.getProperty(\"Workbooks\").toDispatch();
 Object workbook = Dispatch.get(workbooks,\"Add\").toDispatch();
 Object sheet = Dispatch.get(workbook,\"ActiveSheet\").toDispatch();
 Object a1 = Dispatch.invoke(sheet, \"Range\", Dispatch.Get,
 new Object[] {\"A1\"},
 new int[1]).toDispatch();
 Object a2 = Dispatch.invoke(sheet, \"Range\", Dispatch.Get,
 new Object[] {\"A2\"},
 new int[1]).toDispatch();
 Dispatch.put(a1, \"Value\", \"123.456\");
 Dispatch.put(a2, \"Formula\", \"=A1*2\");
 System.out.println(\"a1 from excel:\"+Dispatch.get(a1, \"Value\"));
 System.out.println(\"a2 from excel:\"+Dispatch.get(a2, \"Value\"));
 Variant f = new Variant(false);
 Dispatch.call(workbook, \"Close\", f);
 } catch (Exception e) {
 e.printStackTrace();
 } finally {
 xl.invoke(\"Quit\", new Variant[] {});
 }
 }
}