org.springframework.util包下的ClassUtils类有个静态方法:getDefaultClassLoader() 可以获取当前类加载器，如下:

public static ClassLoader getDefaultClassLoader() {        ClassLoader cl = null;        try {            cl = Thread.currentThread().getContextClassLoader();        } catch (Throwable var3) {            ;        }        if(cl == null) {            cl = ClassUtils.class.getClassLoader();            if(cl == null) {                try {                    cl = ClassLoader.getSystemClassLoader();                } catch (Throwable var2) {                    ;                }            }        }        return cl;    }