如何在Java中配置.dll文件？ [英] How to configure .dll file in Java?

问题描述

我在我的java应用程序中使用 Jacob jar文件。

I am using Jacob jar file in my java application.

这个Jacob jar文件附带一个.dll文件。我已经将Jacob jar文件添加到我的类路径。但是当我执行我的应用程序时，出现运行时错误，因为

This Jacob jar file comes with a .dll file. I have added Jacob jar file to my classpath. But when I execute my application a runtime error occurs as

"couldn't load jacob-1.15-M3-x86.dll file"

如何加载.dll文件？

How can I load this .dll file?

编辑：==========================================

Edited:=================================================================================

我已经将包含我的.dll文件的dir文件的路径环境变量设置为如下。

I had set the "path" environment varaible to the dir that contains my .dll file and loading that .dll file as follows

static {
    System.loadLibrary("jacob-1.15-M3-x86.dll");
}

但发生以下错误

    java.lang.UnsatisfiedLinkError: no jacob-1.15-M3-x86.dll in java.library.path
    at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1734)
    at java.lang.Runtime.loadLibrary0(Runtime.java:823)
    at java.lang.System.loadLibrary(System.java:1028)
    at TemplateClass.TemplateClass.<clinit>(TemplateClass.java:14)

推荐答案

jacob-1.15-M3-x86.dll需要位于操作系统可以找到的位置。您有几个选项：

The 'jacob-1.15-M3-x86.dll' needs to be in a place where your the operating system can find it. You have a few options here:

• 您可以将.dll文件放在您启动应用程序的目录中。如果您有一个批处理脚本启动您的应用程序，那将是该目录。如果您从某种应用程序服务器启动，通常是bin目录。

• You can place the .dll file in the directory you started your application from. If you have a batch script to start your application, it would be that directory. If you are starting in some sort of application server, it would typically be the 'bin' directory.

您可以将.dll文件放在％ PATH％环境变量。我可能会更容易地更新您的PATH环境变量以包含包含.dll文件的目录。

You can place the .dll file somewhere in the %PATH% environment variable. I may be easier to just update your PATH environment variable to include the directory that contains your .dll file.

另一个选项是将.dll放入％SystemRoot％\system32目录。通常这是'C：\Windows\system32'。通常不建议使用此选项，除非是像MSCVRT运行时一样的共享库。

Another option is to place your .dll into the %SystemRoot%\system32 directory. Usually this is 'C:\Windows\system32'. This option is not usually recommended unless it is a shared library like the MSCVRT runtime.

另一个可能的问题有。如果.dll被编译为32位，则必须在32位Java运行时中运行。同样，如果它是一个64位的.dll，它需要在64位JRE中运行。

One other possible issue you might have. If the .dll is compiled as 32-bit, then you must be running in the 32-bit Java runtime. Likewise, if it is a 64-bit .dll it needs to be run in a 64-bit JRE.

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