java使用openCV异常: UnsatisfiedLinkError: /usr/lib64/libopencv_java342.so/dll

文章讲述了在使用OpenCV3.4.2-2时遇到的UnsatisfiedLinkError,解决方案是通过loadShared方法手动加载动态库,以及提供针对不同平台的文件路径。作者提到可能需要将对应OS的文件复制到系统路径下以解决问题。

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使用openCV 3.4.2-2的时候 提示,UnsatisfiedLinkError: libopencv_java342.dll

后面查询说是没有加载对应的动态库,网上找了下说是要使用如下代码手动加载

    static {
        // load native 方法
        nu.pattern.OpenCV.loadShared();
    }

可以看里面的方法, 他会加载对应的libopencv_java342文件将此文件提取到一个临时位置(当 JVM 关闭时,该位置将被删除),然后加载对应位置的此文件。

private static Path extractNativeBinary(OS os, Arch arch) {
        String location;
        label34:
        switch (os) {
            case LINUX:
                switch (arch) {
                    case X86_32:
                        location = "/nu/pattern/opencv/linux/x86_32/libopencv_java342.so";
                        break label34;
                    case X86_64:
                        location = "/nu/pattern/opencv/linux/x86_64/libopencv_java342.so";
                        break label34;
                    case ARMv8:
                        location = "/nu/pattern/opencv/linux/ARMv8/libopencv_java342.so";
                        break label34;
                    default:
                        throw new UnsupportedPlatformException(os, arch, (SyntheticClass_1)null);
                }
            case OSX:
                switch (arch) {
                    case X86_64:
                        location = "/nu/pattern/opencv/osx/x86_64/libopencv_java342.dylib";
                        break label34;
                    default:
                        throw new UnsupportedPlatformException(os, arch, (SyntheticClass_1)null);
                }
            case WINDOWS:
                switch (arch) {
                    case X86_32:
                        location = "/nu/pattern/opencv/windows/x86_32/opencv_java342.dll";
                        break label34;
                    case X86_64:
                        location = "/nu/pattern/opencv/windows/x86_64/opencv_java342.dll";
                        break label34;
                    default:
                        throw new UnsupportedPlatformException(os, arch, (SyntheticClass_1)null);
                }
            default:
                throw new UnsupportedPlatformException(os, arch, (SyntheticClass_1)null);
        }

加上之后后面还是报错,看起来是此这个复制没有成功,没有找到复制失败的原因,但是我们可以去对应目录/nu/pattern/opencv/下将对应OS的文件复制到系统路径下,例如linux的 复制到/usr/lib64/即可

 cp  ~/.m2/repository/org/openpnp/opencv/3.4.2-2/nu/pattern/opencv/linux/x86_64libopencv_java430.so /usr/lib64/
Caused by: java.lang.UnsatisfiedLinkError: no opencv_java460 in java.library.path: C:\Program Files\Java\jdk-17\bin;C:\WINDOWS\Sun\Java\bin;C:\WINDOWS\system32;C:\WINDOWS;E:\lin\bin\;C:\Program Files\Common Files\Oracle\Java\javapath;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\WINDOWS\System32\WindowsPowerShell\v1.0\;C:\WINDOWS\System32\OpenSSH\;C:\Program Files\MySQL\MySQL Server 8.2\bin;C:\Users\Lenovo\AppData\Local\Programs\Python\Python312;E:\java11\bin;C:\Program Files\Java\jdk-17\bin;E:\apache-jmeter-5.6.2\apache-jmeter-5.6.2\bin;E:\redis\;C:\Program Files\dotnet\;E:\nvm-set\nvm;E:\nvm-set\node.js;E:\maven\apache-maven-3.6.3\bin;D:\Tesseract-OCR;E:\phantomjs-2.1.1-windows\phantomjs-2.1.1-windows\bin;C:\Program Files (x86)\NVIDIA Corporation\PhysX\Common;D:\rose\common;C:\Program Files\NVIDIA Corporation\NVIDIA app\NvDLISR;E:\apache-tomcat-8.5.97\apache-tomcat-8.5.97\bin;C:\Users\Lenovo\AppData\Local\Programs\Python\Launcher\;C:\Users\Lenovo\AppData\Local\Microsoft\WindowsApps;E:\Microsoft VS Code\bin;C:\Users\Lenovo\AppData\Local\Programs\Python\Python312;E:\java11\bin;E:\node\node_modules;C:\Users\Lenovo\AppData\Roaming\npm;E:\nvm-set\nvm;E:\nvm-set\nodejs;E:\maven\apache-maven-3.6.3\bin;E:\phantomjs-2.1.1-windows\phantomjs-2.1.1-windows\bin;;. at java.base/java.lang.ClassLoader.loadLibrary(ClassLoader.java:2429) at java.base/java.lang.Runtime.loadLibrary0(Runtime.java:818) at java.base/java.lang.System.loadLibrary(System.java:1989) at com.neu.smty.service.FaceCompare.<clinit>(FaceCompare.java:42) at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:77) at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) at java.base/java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:499) at java.base/java.lang.reflec
最新发布
03-28
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