code: protected final ClassFile getClassFile(String className)
  	{
  		ClassFile cf=null;
  		String filePath=null;
  		if(className!=null && !className.isEmpty())
  		{
  			String rootPath=getClassRootDir();
  			if(rootPath.endsWith("/")||rootPath.endsWith("\\"))
  			{
  			}else
  			{
  				rootPath=rootPath+File.separator;
  			}
  			filePath=rootPath+className.replace('.', File.separatorChar)+".class";
  		}
  		File file=new File(filePath);
  		if(file.exists() && file.isFile())
  		{
  			cf=new ClassFile(className, file.getPath());
  			cf.setLastModifyTime(file.lastModified());
  		}
  		return cf;
  	}
docs: 路径解析
  @param className
  @return