Java JNA加载DLL

Question

当我尝试像这样加载 DLL 时遇到问题:

String a = "C:\\Users\\ElteGps 022\\Documents\\NetBeansProjects\\JavaApplication1\\src\\lib\\EQ2008_Dll.dll";
        String strDllFileName = m_strUserPath + "\\res\\EQ2008_Dll.dll";
        String strEQ2008_Dll_Set_Path = m_strUserPath + "\\res\\EQ2008_Dll_Set.ini";
        m_DllLibrary = (DllLibrary) Native.loadLibrary(a,DllLibrary.class);

我看到了这个:

Exception in thread "main" java.lang.UnsatisfiedLinkError: Unable to load library 'C:\Users\ElteGps 022\Documents\NetBeansProjects\JavaApplication1\src\lib\EQ2008_Dll.dll': Nie mo¿na odnaleæ okrelonego modu³
    at com.sun.jna.NativeLibrary.loadLibrary(NativeLibrary.java:163)
    at com.sun.jna.NativeLibrary.getInstance(NativeLibrary.java:236)
    at com.sun.jna.Library$Handler.<init>(Library.java:140)
    at com.sun.jna.Native.loadLibrary(Native.java:379)
    at com.sun.jna.Native.loadLibrary(Native.java:364)
    at javaapplication1.Fun.main(Fun.java:280)

我阅读并这样做了:

• > Can not add all the classes files from the JNI folder in Eclipse (JAVA, Windows 7)
• > giving 'java.library.path' in netbeans for .dll/.so files

Answer 1

来自JNA javadoc

Library Search Paths A search for a given library will scan the following locations:

1. jna.library.path User-customizable path
2. jna.platform.library.path Platform-specific paths
3. On OSX, ~/Library/Frameworks, /Library/Frameworks, and /System/Library/Frameworks will be searched for a framework with a name corresponding to that requested. Absolute paths to frameworks are also accepted, either ending at the framework name (sans ".framework") or the full path to the framework shared library (e.g. CoreServices.framework/CoreServices).
4. Context class loader classpath. Deployed native libraries may be installed on the classpath under ${os-prefix}/LIBRARY_FILENAME, where ${os-prefix} is the OS/Arch prefix returned by Platform.getNativeLibraryResourcePrefix(). If bundled in a jar file, the resource will be extracted to jna.tmpdir for loading, and later removed (but only if jna.nounpack is false or not set).

You may set the system property jna.debug_load=true to make JNA print the steps of its library search to the console.

Native.loadLibrary 不适用于完整路径，请改用 System.load 如果你不能使用它，你也可以通过像这样设置java的环境变量来指定dll的目录加载之前

System.setProperty("jna.library.path", "C:\\Users\\ElteGps 022\\Documents\\NetBeansProjects\\JavaApplication1\\src\\lib");

但强烈不推荐这样做，因为它只能在您的计算机上运行