库存在，与Java相同的架构，但我仍然得到java.lang.UnsatisfiedLinkError：无法加载库

Question

我正在运行64个窗口。我的java版本说：

java version "1.8.0_60"
Java(TM) SE Runtime Environment (build 1.8.0_60-b27)
Java HotSpot(TM) 64-Bit Server VM (build 25.60-b23, mixed mode)

我的项目是GWT Spring项目在Apache Tomcat服务器上运行，上面的java属性适用于服务器（据说澄清了服务器不小心运行不同的Java版本）。

在Java代码中，我使用System.getProperty("sun.arch.data.model")来确定Java版本，并根据结果，加载64位或32位dll。在具体情况下，我现在运行64位，因此我需要64位dll文件。我把文件放在这个位置：

D:\programs\apache-tomcat-7.0.64-windows-x64\webapps\war\WEB-INF\lib\MY_LIBRARYx64.dll

在java代码中，我有这个函数来加载库：

private void setLibraryPath_private(String libraryPath) {

    // Some magic which doesn't work anyway
    File path = new File(configService.getProjectPrefix() + libraryPath);


    try {
        // Get valid canonical path (special case of absolute path)
        path = new File(path.getCanonicalPath());
        // Check for readability of that location
        if(!path.canRead())
            throw new IOException("Cannot read from this file.");
    }
    catch(IOException e) {
        logger.error("Invalid path to R220 library: "+path.getAbsolutePath(), e);
    }

    // Remember path as string
    this.libraryPath = path.getAbsolutePath();
    try {
        // Load it
        library =
        (R220) Native.loadLibrary(path.getCanonicalPath(), R220.class);
    }
    catch(Throwable e) {
        // TODO: After loading problem is solved, probably replace throw with the logging
        //logger.error("Failed to load R220 library: "+path.getAbsolutePath(), e);          
        throw new IllegalArgumentException("Failed to load R220 library: "+path.getAbsolutePath(), e);
    }
    // I don't know what this is
    library.initLogger(configService.getLog4cplusConfigFilePath()); 
}

但是在我的日志中我仍然会收到错误：

[INFO ] 2015-09-21 15:52:26,038 cz.techsys.web.server.R220LibService - Running 64bit version of the native libary.
[ERROR] 2015-09-21 15:52:26,113 cz.techsys.web.server.R220LibService - Failed to load R220 library: D:\programs\apache-tomcat-7.0.64-windows-x64\webapps\war\WEB-INF\lib\MY_LIBRARYx64.dll
java.lang.UnsatisfiedLinkError: Unable to load library 'D:\programs\apache-tomcat-7.0.64-windows-x64\webapps\war\WEB-INF\lib\MY_LIBRARYx64.dll': The specified module could not be found.

    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)

我还检查了我的库是否真的是64位。根据{{​​3}}：

我还将它与32位版本进行了比较，如下所示：

总结一下：

• 处理器架构匹配库和Java
• 该库位于可读且可访问的位置

还有什么可能导致麻烦？

修改 根据这里的一些评论，我还试图传递没有扩展名的库名，并通过System设置库路径：

    // Remove name from extension
    String name = path.getName().replaceFirst("[.][^.]+$", "");
    // Get directory path
    String dir = path.getParentFile().getAbsolutePath();
    // Print path to console for debug
    logger.warn("\n       Lib path: "+dir+"\n       Lib name:"+name);
    // Change library path
    System.setProperty("jna.library.path", dir);
    // Load it
    library =
    (R220) Native.loadLibrary(name, R220.class);

毋庸置疑，除了错误消息现在稍微短一点之外，这没有任何效果：

[WARN ] 2015-09-21 16:33:56,819 cz.techsys.web.server.R220LibService - 
       Lib path: D:\programs\apache-tomcat-7.0.64-windows-x64\webapps\war\WEB-INF\lib
       Lib name:WebSightR220libx64
[ERROR] 2015-09-21 16:33:56,882 cz.techsys.web.server.R220LibService - Failed to load R220 library: D:\programs\apache-tomcat-7.0.64-windows-x64\webapps\war\WEB-INF\lib\WebSightR220libx64.dll
java.lang.UnsatisfiedLinkError: Unable to load library 'WebSightR220libx64': The specified module could not be found.

    at com.sun.jna.NativeLibrary.loadLibrary(NativeLibrary.java:163)
    at com.sun.jna.NativeLibrary.getInstance(NativeLibrary.java:236)