无法在JNA中找到加载DLL的指定模块
无法在JNA中找到加载DLL的指定模块
提问于 2020-08-25 16:50:39
我有一个类首字母：
System.setProperty("java.library.path", "C:\\Users\\lucas\\Desktop\\libraries");
System.loadLibrary("libTTARCHHelper");
TTARCH_LIBRARY=(TtarchLibrary)Native.loadLibrary(TtarchLibrary.class);而DLL位于C:\\Users\\lucas\\Desktop\\libraries\\libTTARCHHelper.dll。
如果我在Eclipse中运行这个程序，就会得到“找不到指定的模块”，如果我将它作为JAR运行，就会得到‘java.labary.path中没有libTTARCHHelper’。
我该怎么解决这些问题？我甚至尝试将DLL放在PATH环境变量的文件夹中。
使用文件直接加载完成调试：
Aug 26, 2020 12:28:51 AM com.sun.jna.Native extractFromResourcePath
INFO: Looking in classpath from jdk.internal.loader.ClassLoaders$AppClassLoader@c387f44 for /com/sun/jna/win32-x86-64/jnidispatch.dll
Aug 26, 2020 12:28:51 AM com.sun.jna.Native extractFromResourcePath
INFO: Found library resource at jar:file:/C:/Users/lucas/Desktop/My%20Stuff/Eclipse%20Workspaces/Build%20Paths/jna-5.6.0.jar!/com/sun/jna/win32-x86-64/jnidispatch.dll
Aug 26, 2020 12:28:51 AM com.sun.jna.Native extractFromResourcePath
INFO: Extracting library to C:\Users\lucas\AppData\Local\Temp\jna-103324076\jna5931694657592960137.dll
Aug 26, 2020 12:28:51 AM com.sun.jna.NativeLibrary loadLibrary
INFO: Looking for library 'C:\Users\lucas\Desktop\libraries\libTTARCHHelper.dll'
Aug 26, 2020 12:28:51 AM com.sun.jna.NativeLibrary loadLibrary
INFO: Adding paths from jna.library.path: null
Aug 26, 2020 12:28:51 AM com.sun.jna.NativeLibrary loadLibrary
INFO: Trying C:\Users\lucas\Desktop\libraries\libTTARCHHelper.dll
Aug 26, 2020 12:28:51 AM com.sun.jna.NativeLibrary loadLibrary
INFO: Loading failed with message: The specified module could not be found.
Aug 26, 2020 12:28:51 AM com.sun.jna.NativeLibrary loadLibrary
INFO: Adding system paths: []
Aug 26, 2020 12:28:51 AM com.sun.jna.NativeLibrary loadLibrary
INFO: Trying C:\Users\lucas\Desktop\libraries\libTTARCHHelper.dll
Aug 26, 2020 12:28:51 AM com.sun.jna.NativeLibrary loadLibrary
INFO: Loading failed with message: The specified module could not be found.
Aug 26, 2020 12:28:51 AM com.sun.jna.Native extractFromResourcePath
INFO: Looking in classpath from jdk.internal.loader.ClassLoaders$AppClassLoader@c387f44 for C:\Users\lucas\Desktop\libraries\libTTARCHHelper.dll
Aug 26, 2020 12:28:51 AM com.sun.jna.NativeLibrary loadLibrary
INFO: Loading failed with message: Native library (win32-x86-64/C:\Users\lucas\Desktop\libraries\libTTARCHHelper.dll) not found in resource path (C:\Users\lucas\eclipse-workspace\TEST\bin;C:\Users\lucas\Desktop\My Stuff\Eclipse Workspaces\Build Paths\jna-5.6.0.jar)
Exception in thread "main" java.lang.UnsatisfiedLinkError: Unable to load library 'C:\Users\lucas\Desktop\libraries\libTTARCHHelper.dll':
The specified module could not be found.
The specified module could not be found.剩下的痕迹：
Native library (win32-x86-64/C:\Users\lucas\Desktop\libraries\libTTARCHHelper.dll) not found in resource path (C:\Users\lucas\eclipse-workspace\TEST\bin;C:\Users\lucas\Desktop\My Stuff\Eclipse Workspaces\Build Paths\jna-5.6.0.jar)
at com.sun.jna.NativeLibrary.loadLibrary(NativeLibrary.java:301)
at com.sun.jna.NativeLibrary.getInstance(NativeLibrary.java:461)
at com.sun.jna.Library$Handler.<init>(Library.java:192)
at com.sun.jna.Native.loadLibrary(Native.java:646)
at com.sun.jna.Native.loadLibrary(Native.java:630)
at com.test.TTARCHHelper.<clinit>(TTARCHHelper.java:17)
at com.test.main.main(main.java:6)
Suppressed: java.lang.UnsatisfiedLinkError: The specified module could not be found.
at com.sun.jna.Native.open(Native Method)
at com.sun.jna.NativeLibrary.loadLibrary(NativeLibrary.java:191)
... 6 more
Suppressed: java.lang.UnsatisfiedLinkError: The specified module could not be found.
at com.sun.jna.Native.open(Native Method)
at com.sun.jna.NativeLibrary.loadLibrary(NativeLibrary.java:204)
... 6 more
Suppressed: java.io.IOException: Native library (win32-x86-64/C:\Users\lucas\Desktop\libraries\libTTARCHHelper.dll) not found in resource path (C:\Users\lucas\eclipse-workspace\TEST\bin;C:\Users\lucas\Desktop\My Stuff\Eclipse Workspaces\Build Paths\jna-5.6.0.jar)
at com.sun.jna.Native.extractFromResourcePath(Native.java:1095)
at com.sun.jna.NativeLibrary.loadLibrary(NativeLibrary.java:275)
... 6 more所以看起来它找不到它，它抛出了一个
java.lang.UnsatisfiedLinkError: The specified module could not be found.我发现了问题，DLL是错误的。Eclipse运行在64上，JAR使用32位JVM。我也下载了32位dll，现在它在运行JAR时起作用了。但是，Eclipse中的64位dll总是抛出上面的模块异常
回答 1
Stack Overflow用户
回答已采纳
发布于 2020-08-25 18:10:49
JNA将在jna.library.path环境变量中的位置查找库。
一个选项是将它指定为Eclipse运行配置中的命令行选项。在“运行”菜单中，选择“运行配置”。转到(X)=参数选项卡。将其添加到VM参数字段中：
-Djna.library.path=C:\Users\lucas\Desktop\libraries
在尝试加载DLL之前，还可以在代码中以编程方式设置它：
System.setProperty("jna.library.path", "C:\\Users\\lucas\\Desktop\\libraries");
正如稍后在调试日志中指出的那样，它可能正在查找DLL，但未能打开它。造成这种情况的可能原因可以是：
- DLL运行时依赖于系统上另一个不在适当路径上的DLL。一个常见的问题是VisualC++可分发。有关更多信息，您可能需要查阅DLL文档。有时，您可以从过程监视器库中使用SysInternals来尝试查看它正在打开的内容。
- 具有上述依赖DLL的重复/不兼容版本
- 运行64位JVM并尝试打开不兼容64位的DLL，反之亦然。
- 您的Java程序可能没有读取库所在目录的权限
要帮助诊断问题，请查看整个堆栈跟踪。虽然最近的错误消息可能与此无关(在“备份”搜索中找不到文件)，但如果您向下查找跟踪，您可能会发现先前试图打开DLL时出现的多个被抑制的异常，这可能会为您提供更多信息丰富的调试信息。
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/63583607
复制相关文章
相似问题
腾讯云开发者
