java无法调用。OCX法
您好,我目前的任务是转换一个遗留的Visual Basic 6应用程序,该应用程序通过第三方应用程序XFS和存折打印机通信。ocx(无来源)
根据我的研究,我可以做这个任务,但我遇到了一个错误。有人能帮我吗?根据日志,我的程序可以实例化activeXcomponent,并查看我想要使用的方法的id,但是当我尝试使用它们时,我遇到了一个错误
在我使用的示例VB6代码中,方法VersionRequired需要两个整数作为参数,而ApplicationID只需要一个字符串
希望我只是在语法或JACOB方法上犯了一个错误,因为我只想使用JavaJNI作为最后手段。请注意,此应用程序将始终安装在Windows(7/10)工作站中,因此其他操作系统兼容性不是问题
这是我的代码
ActiveXComponent activeXComponent = new ActiveXComponent("XFS.XFSCtrl.1");
System.out.println( activeXComponent.getIDOfName(activeXComponent, "ApplicationID"));
System.out.println( activeXComponent.getIDOfName(activeXComponent, "VersionRequired"));
System.out.println( activeXComponent.getIDOfName(activeXComponent, "Description"));
System.out.println( activeXComponent.getIDOfName(activeXComponent, "Open"));
//Variant variant = activeXComponent.call(activeXComponent, "VersionRequired",1,1);
//Variant variant = activeXComponent.call(activeXComponent, "Description"); // added 072318 for David answer
//Variant variant = activeXComponent.getProperty("Description");
//activeXComponent.setProperty("Description", "Description");
//Variant variant = activeXComponent.get(activeXComponent,"Description");
activeXComponent.call(activeXComponent, "Description", "value");
以下是我遇到的日志和错误
WARNING: JNI local refs: zu, exceeds capacity: zu
at java.lang.System.initProperties(Native Method)
at java.lang.System.initializeSystemClass(System.java:1166)
main: Loading library jacob-1.19-x86 using System.loadLibrary
main: Loading library jacob-1.19-x86 using System.loadLibrary
main: Loading library jacob-1.19-x86 using System.loadLibrary
main: ComThread: before Init: 0
main: ComThread: after Init: 0
main: ROT: Automatic GC flag == false
main: ComThread: after ROT.addThread: 0
main: ROT: adding com.jacob.activeX.ActiveXComponent@11d50c0->com.jacob.activeX.ActiveXComponent table size prior to addition:0
13
31
1
21
main: ROT: adding ->com.jacob.com.Variant table size prior to addition:1
main: ROT: adding ->com.jacob.com.Variant table size prior to addition:2
main: ROT: adding ->com.jacob.com.Variant table size prior to addition:3
main: ROT: adding ->com.jacob.com.Variant table size prior to addition:4
main: ROT: adding ->com.jacob.com.Variant table size prior to addition:5
Exception in thread "main" com.jacob.com.ComFailException: A COM exception has been encountered:
At Invoke of: Description
Description: 8000ffff / Catastrophic failure
at com.jacob.com.Dispatch.invokev(Native Method)
at com.jacob.com.Dispatch.invokev(Dispatch.java:625)
at com.jacob.com.Dispatch.callN(Dispatch.java:453)
// at com.jacob.com.Dispatch.get(Dispatch.java:788) // added 072318 when using activeXComponent.get(activeXComponent,"Description")
at com.jacob.com.Dispatch.call(Dispatch.java:541)
// at com.jacob.com.Dispatch.call(Dispatch.java:529) // added 072318 for David answer
at ph.com.bdo.icos.passbook.Launcher.main(Launcher.java:32)
我正在使用的VB代码作为参考
With XFS1
'Set up the versions required of XFS and SP
.VersionRequired(WFS_VERSREQ_OLE, WFS_VERSREQ_LOW) = 1# ' 2.00
.VersionRequired(WFS_VERSREQ_OLE, WFS_VERSREQ_HIGH) = 2# ' 2.00
.VersionRequired(WFS_VERSREQ_API, WFS_VERSREQ_LOW) = 1.01
.VersionRequired(WFS_VERSREQ_API, WFS_VERSREQ_HIGH) = 2#
.VersionRequired(WFS_VERSREQ_SRV, WFS_VERSREQ_LOW) = 1.01
.VersionRequired(WFS_VERSREQ_SRV, WFS_VERSREQ_HIGH) = 2.1
'Get back one of the values for testing
fResult = .VersionRequired(WFS_VERSREQ_API, WFS_VERSREQ_LOW)
'Set and Get the Application property for testing
.ApplicationID = "Passbook Printer"
sAppID = .ApplicationID
sDescription = .Description
# 1 楼答案
我猜描述是只读属性,而不是函数
因此,您不能对其使用调用,而此代码将出现错误,导致灾难性的故障(COM错误一直不清楚):
activeXComponent.call(activeXComponent, "Description", "value");
如消息日志所述:
线程“main”com中出现异常。雅各布。通用域名格式。ComFailException:在调用时遇到COM异常::Description
你也不能设置属性,因为它是只读的:
activeXComponent.setProperty("Description", "Description");
如果你读对了你的描述,只要你读对了
请尝试以下方法:
Variant v = activeXComponent.call(activeXComponent, "Description");
String description = v.toString();