Java可以尽可能地找到负载库

Question

我正在编写一个Java Web应用程序，该应用程序需要通过Java源代码加载本机C ++ DLL。我已将DLL放置在同一目录处的DLL和所有因DLL。 我的函数addLibraryPath确保添加DLL位置的路径以添加到Java库路径。

我期望这可以作为主DLL和依赖的DLL都位于同一DIR中。

public class Test
{
  public static void addLibraryPath(String pathToAdd) throws Exception
  {
    final Field usrPathsField = ClassLoader.class.getDeclaredField("usr_paths");
    usrPathsField.setAccessible(true);

    //get array of paths
    final String[] paths = (String[])usrPathsField.get(null);

    //check if the path to add is already present
    for(String path : paths) {
      if(path.equals(pathToAdd)) {
        return;
      }
    }

    //add the new path
    final String[] newPaths = Arrays.copyOf(paths, paths.length + 1);
    newPaths[newPaths.length-1] = pathToAdd;
    usrPathsField.set(null, newPaths);
  }

  static
  {
    try {
      
      addLibraryPath("C:\\mydirA\\mydirB\\");
    } catch (Exception aE) {
      aE.printStackTrace();
    }
    
    // DLL name is myCPPlibrary.dll
    System.loadLibrary("myCPPlibrary");
  }
}

但是，我仍然得到

java.util.ServiceConfigurationError: com.test.wms.server.myfactory: could not be instantiated: java.lang.UnsatisfiedLinkError: C:\\mydirA\\mydirB\\\myCPPlibrary.dll: Can't find dependent libraries
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.base/java.lang.reflect.Method.invoke(Method.java:566)
    at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleElement.invoke(InitDestroyAnnotationBeanPostProcessor.java:363)
    at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleMetadata.invokeInitMethods(InitDestroyAnnotationBeanPostProcessor.java:307)
    at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:316)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1260)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1248)
Caused by: java.lang.UnsatisfiedLinkError: C:\\mydirA\\mydirB\\\myCPPlibrary.dll: Can't find dependent libraries
    at java.base/java.lang.ClassLoader$NativeLibrary.load0(Native Method)
    at java.base/java.lang.ClassLoader$NativeLibrary.load(ClassLoader.java:2442)
    at java.base/java.lang.ClassLoader$NativeLibrary.loadLibrary(ClassLoader.java:2498)
    at java.base/java.lang.ClassLoader.loadLibrary0(ClassLoader.java:2694)
    at java.base/java.lang.ClassLoader.loadLibrary(ClassLoader.java:2659)
    at java.base/java.lang.Runtime.loadLibrary0(Runtime.java:830)
    ... 31 common frames omitted