JNA调用DLL报 java.lang.UnsatisfiedLinkError

//最直接的方式是将umsDevTool_sp30.dll放在System32下面,Mapper接口继承Library
Mapper instance3 = (Mapper) Native.loadLibrary("umsDevTool_sp30", Mapper.class);

使用JNA时加载动态库,报错如下:

Exception in thread "main" java.lang.UnsatisfiedLinkError: Unable to load library 'umsDevTool_sp30': Native library (win32-x86-64/umsDevTool_sp30.dll) not found in resource path ([file:/D:/workspaces_for_java/JnaDll/bin/, file:/D:/workspaces_for_java/JnaDll/lib/jna-4.1.0.jar])
    at com.sun.jna.NativeLibrary.loadLibrary(NativeLibrary.java:271)
    at com.sun.jna.NativeLibrary.getInstance(NativeLibrary.java:398)
    at com.sun.jna.Library$Handler.<init>(Library.java:147)
    at com.sun.jna.Native.loadLibrary(Native.java:412)
    at com.sun.jna.Native.loadLibrary(Native.java:391)
    at com.win32.Mapper.<clinit>(Mapper.java:21)
    at com.win32.Main.main(Main.java:8)

问题在于:动态库是32位的,而JDK64位的,所以,如果要调用32位的JDK必须是32位的;相应地,如果动态库是64位的,必须使用64JDK


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