if(!file.exists()){
ResourceUtil.removeChildrenEL(temp, new ExtensionResourceFilter(".lmdp"));
file.createFile(true);
//print.out(new Info().getClass().getResource("/resource/lib/pd4ml.jar"));
InputStream jar = new Info().getClass().getResourceAsStream("/resource/lib/pd4ml.jar");
IOUtil.copy(jar, file,true);
}
ClassLoader parent = Version.class.getClassLoader();
classLoader=new URLClassLoader(new URL[]{FileWrapper.toFile(file).toURL()},parent);