我正在爲一個程序開發API系統。這個系統進入一個'插件'文件夾並在那裏加載每個jar文件。我正在嘗試加載'plugin'文件夾中的jar文件的主類,但這樣做時,我得到一個ClassNotFoundException異常。加載jar文件時未找到Java類
這裏是我的代碼:
private static void loadClassFromJar(String PluginJar) throws MalformedURLException, ClassNotFoundException, InstantiationException, IllegalAccessException, NoSuchMethodException, SecurityException, IllegalArgumentException, InvocationTargetException {
logger.debug("jar:file:" + "./debug/plugins/DiamondCorePlugin.jar!/");
URL[] urls = { new URL("jar:file:" + FileList.PluginFolder.getAbsolutePath() + PluginJar +"!/") };
URLClassLoader ClassLoader = URLClassLoader.newInstance(urls);
Class<?> Class = ClassLoader.loadClass("net.trenterprises.diamondcore.plugin.Main");
Object Object = Class.newInstance();
Method EventMethod = Object.getClass().getMethod("onEnable");
EventMethod.invoke(Object);
}
如果問題是含糊不清或不明確的,請讓我知道(我是新來的身邊,所以我盡我所能去的話,我問任何問題)。編輯: 忘記包含堆棧跟蹤。這裏是!
java.lang.ClassNotFoundException: net.trenterprises.diamondcore.plugin.Main
at java.net.URLClassLoader$1.run(URLClassLoader.java:372)
at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:360)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at java.net.FactoryURLClassLoader.loadClass(URLClassLoader.java:798)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at net.trenterprises.diamondcore.cross.api.PluginLoader.loadClassFromJar(PluginLoader.java:53)
at net.trenterprises.diamondcore.cross.api.PluginLoader.loadAllPlugins(PluginLoader.java:25)
at net.trenterprises.diamondcore.DiamondCoreServer.<init>(DiamondCoreServer.java:47)
at net.trenterprises.diamondcore.run.main(run.java:15)
'trenterprises'似乎是一個陌生的名字,也許你的意思'enterprises' – 2015-02-06 01:17:44