java - 是否可以在运行时加载库？

Question

如果 java 库(.jar 文件)不在类路径中，有没有办法在运行时加载它？

Answer 1

URLClassLoader child = new URLClassLoader (myJar.toURL(), this.getClass().getClassLoader());
Class classToLoad = Class.forName ("com.MyClass", true, child);
Method method = classToLoad.getDeclaredMethod ("myMethod");
Object instance = classToLoad.newInstance ();
Object result = method.invoke (instance);

来源:How should I load Jars dynamically at runtime?