java JVM-线程上下类加载器

Posted 2022-11-13

public class One public static void main(String[] args) throws Exception ClassLoader loader=One.class.getClassLoader(); System.out.println(loader); //获得当前线程的上下文加载器，未改变前和第一种是一样的 ClassLoader loader2=Thread.currentThread().getContextClassLoader(); System.out.println(loader2); //修改当前线程的上下文修改器 Thread.currentThread().setContextClassLoader(new Loader("d:/myjava")); System.out.println(Thread.currentThread().getContextClassLoader()); Class<Dema> c=(Class<Dema>) Thread.currentThread().getContextClassLoader().loadClass("cn.sxt.in.Dema"); System.out.println(c); System.out.println(c.getClassLoader()); //因为定义了父类委派机制，所以还是app加载