无法执行COM类:com4j.ComException:80040154 CoCreateInstance失败:未注册类:.\ com4j.cpp:153 [英] Failed to execute COM class: com4j.ComException: 80040154 CoCreateInstance failed : Class not registered : .\com4j.cpp:153

问题描述

我正在尝试几天，以从JAVA应用程序执行".dll"文件.如果您有兴趣，可以阅读我的第一个问题:使用command调用.dll函数线

I'm trying for some days to execute a ".dll" file from an JAVA application. If you are interested you can read my first question: Call a .dll function using command line

我使用"com4j"为我的DLL创建COM类.生成的类看起来不错，我尝试执行代码，更确切地说是执行位于名为"_Tester"的类中的名为"getUnitInfo"的方法:

I used "com4j" to create the COM classes for my DLL. The generated classes looks good and I tried to execute the code, more exactly a method called "getUnitInfo" located in a class called "_Tester":

@DISPID(1610809376) //= 0x60030020. The runtime will prefer the VTID if present
  @VTID(8)
  int getUnitInfo(
    java.lang.String strRequest,
    Holder<java.lang.String> strUnitInfo,
    @Optional @DefaultValue("") java.lang.String strStationName,
    @Optional @DefaultValue("") java.lang.String strUserID);

实例:

Holder<String> holder = new Holder<String>("test");
        _Tester instance =  ClassFactory.createTester();
        instance.getUnitInfo("", holder, "", "");  

但是它抛出了这个异常:

But it throws this exception:

Exception in thread "main" com4j.ExecutionException: com4j.ComException: 80040154 CoCreateInstance failed : Class not registered : .\com4j.cpp:153
    at com4j.ComThread.execute(ComThread.java:203)
    at com4j.Task.execute(Task.java:25)
    at com4j.COM4J.createInstance(COM4J.java:97)
    at com4j.COM4J.createInstance(COM4J.java:72)
    at DLL.ClassFactory.createTester(ClassFactory.java:21)
    at proiect.DllTest.run(DllTest.java:17)
    at proiect.DllTest.main(DllTest.java:11)

我已经在互联网上阅读了很多有关此问题的帖子，但没有任何帮助. 使用"PE解构"工具发现我需要执行的.dll文件是基于32位的.我有一个64位的Windows操作系统，但我安装了一个32位的JAVA和Eclipse.

I have read a lot of posts regarding this problem on the internet but nothing helped. Using "PE deconstruct" tool to find out that the .dll file that I need to execute is 32 bit based. I have a 64 bit Windows OS but I installed a 32 bit JAVA and Eclipse.

如果我在命令行中执行"java -version":

If I execute "java -version" o the command line:

java version "1.8.0_171"
Java(TM) SE Runtime Environment (build 1.8.0_171-b11)
Java HotSpot(TM) Client VM (build 25.171-b11, mixed mode)

com4j文档缺少信息，我认为新生成的JAva代码仍需要与旧DLL进行通信，但是我不知道该如何引用它.

The com4j documentation is lacking information, I think the new generated JAva code still need to communicate with the old DLL but I don't know how it has to be referenced.

有人可以帮忙吗?

编辑 实例是使用以下UUID创建的:

EDIT The instance is create using this UUID:

 public static DLL._Tester createTester() {
    return COM4J.createInstance( DLL._Tester.class, "{4B7CF2DB-F936-4BA3-9DC6-5E99E5220270}" );
  }

我在Windows注册表中找到了这个:

And I found this in the Windows registry:

推荐答案

CoCreateInstance failed : Class not registered表示您提供的GUID与Windows注册表中的任何COM项都不匹配.

CoCreateInstance failed : Class not registered means the GUID you provided does not match any COM item in your Windows registry.

您可以尝试使用其他GUID加载COM对象-进入系统注册表并找到任何有效的GUID，也许是与Microsoft Excel相关联的GUID(在我的情况下，该条目位于Computer\HKEY_CLASSES_ROOT\Excel.Application\CLSID下).

You can try loading a COM object with a different GUID- go into system registry and find any valid GUID, maybe the one associated with Microsoft Excel (in my case, the entry is located under Computer\HKEY_CLASSES_ROOT\Excel.Application\CLSID).

要注册您的DLL，也许如何在64位Windows 7上注册DLL文件?有帮助.

To register your DLL, maybe How do I register a DLL file on Windows 7 64-bit? helps.

编辑 在Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID下检查注册表. 您的GUID是否列在类"下?

EDIT Check your registry under Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID. Is you GUID listed under Classes?

这篇关于无法执行COM类:com4j.ComException:80040154 CoCreateInstance失败:未注册类:.\ com4j.cpp:153的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！