urlclassloader

Caused by: java.lang.ClassNotFoundException: org.w3c.dom.ElementTraversal at java.net.URLClassLoader$1.run(URLClassLoader.java:366) at java.net.URLClassLoader$1.run(URLClassLoader.java:355) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:354) at java.lang.ClassLoader.loadClass(ClassLoader.java:425) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308) at java.lang.ClassLoader.loadClass(ClassLoader.java:358) ... 63 more 这个问题的解决方案很简单，将org.w3c.dom.ElementTraversal类所在的jar包加入maven依赖即可。 让人纳闷的是，怎么找这个类所在的jar包，单看包名org.w3c

I've created my own URLClassLoader , and set it as the system classloader via java.system.class.loader . It's initialized and everything, but the classes I'm trying to load aren't found. Here's the URLClassLoader : public class LibraryLoader extends URLClassLoader { public LibraryLoader(ClassLoader classLoader) { super(new URL[0], classLoader); } synchronized public void addJarToClasspath(String jarName) throws MalformedURLException, ClassNotFoundException { File filePath = new File(jarName); URI uriPath = filePath.toURI(); URL urlPath = uriPath.toURL(); System.out.println(filePath.exists());

I have a signed applet. To implement some plugin architecture I download and store to disk a JAR file with specific classes. Then I load these classes with URLCLassLoader . So, now I try to invoke some method from loaded class and I have a security issue. It seems to "sign-token" cannot be checked by SecurityManager when class loaded be URLClassLoaded . Anybody know how to solve this problem? Thanks a lot! Loading. URLClassLoader loader = new URLClassLoader(new URL[] {libraryArchive.toURI().toURL()}, Compress.class.getClassLoader()); Invocation. ... org.palettelabs.comm.desktopcapture.pim

I was playing around with classLoaders in Java and noticed a strange thing. If a classLoader loads a class from a jar, this jar is locked indefinitely even if you unreference your classLoader. In the below example, the jar contains a class called HelloWorld. What I do is try to load the class contained in the jar via a classLoader which adds the jar dynamically. If you set skip to true and do not call Class.forName , you can delete the jar but if you do not skip and even if you unreference the classLoader ( classLoader = null ), the jar cannot be deleted until the JVM exits. Why is that? PS: I

I'm trying to dynamically load a java class. The basic idea is, that a jar contains modules which get loaded dynamically at runtime. This is how I do it (I know it's hacky, but there is no other method to dynamically add a jar to an already existing classloader afaik): Method method = URLClassLoader.class.getDeclaredMethod("addURL", new Class[] { URL.class }); method.setAccessible(true); method.invoke(moduleLoader, new Object[] { file.toURI().toURL() }); Class fooClass = moduleLoader.loadClass("com.coderunner.Foo"); Object foo = fooClass.newInstance(); Every module is annotated with an @Module

方案一：对象序列化 其实和hello world类似，只不过增加了一个对象序列化： 序列化就是将一个对象的状态（各个属性量）保存起来，然后在适当的时候再获得。序列化分为两大部分：序列化和反序列化。序列化是这个过程的第一部分，将数据分解成字节流，以便存储在文件中或在网络上传输。反序列化就是打开字节流并重构对象。对象序列化不仅要将基本数据类型转换成字节表示，有时还要恢复数据。恢复数据要求有恢复数据的对象实例。 发送端： public class Send { /** * mq通信的名称 */ private final static String QUEUE_NAME= "hello" ; public static void main (String[] args) throws IOException, TimeoutException{ ConnectionFactory connFactory= new ConnectionFactory(); //设置服务器位置 connFactory.setHost( "localhost" ); //设置服务器端口号 //connFactory.setPort(5672); //创建连接 Connection con=connFactory.newConnection(); //创建channel Channel channel=con

I have small problem. I learn java SE and find class ClassLoader. I try to use it in below code: I am trying to use URLClassLoader to dynamically load a class at runtime. URLClassLoader urlcl = new URLClassLoader(new URL[] {new URL("file:///I:/Studia/PW/Sem6/_repozytorium/workspace/Test/testJavaLoader.jar")}); Class<?> classS = urlcl.loadClass("michal.collection.Stack"); for(Method field: classS.getMethods()) { System.out.println(field.getName()); } Object object = classS.newInstance(); michal.collection.Stack new_name = (michal.collection.Stack) object; The java virtual machine does not see