使用com接口运行excel

Question

我试图使用Jacob运行excel，但它一直抛出异常，一直在寻找这种异常的原因，但没有好的

package com.se.jaexcel;
import com.jacob.activeX.ActiveXComponent;
import com.jacob.com.Dispatch;
import com.jacob.com.Variant;
public class JExcel {
    /**
     * @param args
     */
    public static void main(String[] args) {
        ActiveXComponent xl = new ActiveXComponent("Excel.Application");
    }
}

例外是

Exception in thread "main" com.jacob.com.ComFailException: Can't QI object for IDispatch
    at com.jacob.com.Dispatch.createInstanceNative(Native Method)
    at com.jacob.com.Dispatch.<init>(Dispatch.java:99)
    at com.jacob.activeX.ActiveXComponent.<init>(ActiveXComponent.java:58)
    at com.se.jaexcel.JExcel.main(JExcel.java:14)

Answer 1

您没有加载任何本机dll。在下面的示例中，c:myapplib包含jacob-1.18-M2-x64.dll和jacob-1.18-M2-x86.dll。如果您不想从静态位置加载它们，请参阅http://www.javaquery.com/2013/12/getting-started-with-jacob-example-with.html以了解如何从资源加载DLL。

private static void loadLibrary(final String appDir) throws IOException {
        final String libFile = "amd64".equals(System.getProperty("os.arch")) ? 
                  "/jacob-1.18-M2-x64.dll" : "/jacob-1.18-M2-x86.dll";
        System.setProperty(LibraryLoader.JACOB_DLL_PATH, 
                           Paths.get(appDir, "lib", libFile).toString());
        LibraryLoader.loadJacobLibrary();
    }

public static void main(String[] args) {
        loadLibrary("c:\myapp");
        ActiveXComponent xl = new ActiveXComponent("Excel.Application");
    }