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UnsatisfiedLinkError：本机库sunmscapi.dll已在另一个类加载器中加载

[英]UnsatisfiedLinkError: Native Library sunmscapi.dll already loaded in another classloader

原文 2014-10-31 07:38:37 9 1 java/ eclipse

I have the following scenario: a Java Desktop application which invokes a Java Legacy class using Reflection. 我有以下情形：一个Java桌面应用程序，该应用程序使用Reflection调用Java Legacy类。 The legacy module executes some native operations (access to Smart Card). 旧版模块执行一些本机操作（访问智能卡）。
Everything works fine when running on Eclipse: I have my Java Desktop application as a Java project which has a set of libraries including the Java legacy JAR file. 在Eclipse上运行时，一切工作正常：我将Java桌面应用程序作为Java项目，该项目具有一组包含Java旧版JAR文件的库。
Now I have created a runnable JAR file from the Eclipse project: when I try to access the Java Legacy layer, the following error is issued: java.lang.UnsatisfiedLinkError: Native Library sunmscapi.dll already loaded in another classloader 现在，我已经从Eclipse项目中创建了一个可运行的JAR文件：当我尝试访问Java Legacy层时，发出以下错误： java.lang.UnsatisfiedLinkError：本机库sunmscapi.dll已经加载到另一个类加载器中
What really puzzles me is why it works correctly on Eclipse, which is using the same JDK settings as the runnable JAR file ??? 真正令我困惑的是，为什么它在Eclipse上可以正常运行，而Eclipse使用与可运行的JAR文件相同的JDK设置？ any help 任何帮助

1 个解决方案

Actually Eclipse is not executing a runnable JAR file when launching application, but just adding the single classpath entries (see the .classpath file). 实际上，Eclipse在启动应用程序时不会执行可运行的JAR文件，而只是添加单个类路径条目（请参阅.classpath文件）。 Try to export the Desktop application ONLY in the jar file and then add all the other libs (incuding the legacy app) with -classpath. 尝试仅在jar文件中导出桌面应用程序，然后使用-classpath添加所有其他库（包括旧版应用程序）。 Then you have the same environment as Eclipse and they should not differ in the output. 然后，您将拥有与Eclipse相同的环境，并且它们的输出不应有所不同。