JNA Call DLL Java.lang.UnsatisfiedLinkError

The most straightforward way is to put Umsdevtool_sp30.dll under System32, Mapper interface inherits Librarymapper Instance3 = (Mapper) native.loadlibrary (" Umsdevtool_sp30 ", Mapper.class);

Use JNA when loading the dynamic library, the error is as follows:

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)

the problem is that the dynamic library is +bit, and theJDKis a -bit, so if you want to invoke the +bit ofJDKmust be +and correspondingly, if the dynamic library is -bit, must be used -bitJDK.

JNA Call DLL Java.lang.UnsatisfiedLinkError