import org.apache.ftpserver.ftplet.FileSystemFactory; //导入依赖的package包/类
@Bean
FtpServer ftpServer(UserManager userManager, Listener nioListener, FileSystemFactory fileSystemFactory) throws FtpException {
    FtpServerFactory ftpServerFactory = new FtpServerFactory();
    ftpServerFactory.setListeners(Collections.singletonMap("default", nioListener));
    ftpServerFactory.setFileSystem(fileSystemFactory);
    ftpServerFactory.setUserManager(userManager);
    return ftpServerFactory.createServer();
}
 

import org.apache.ftpserver.ftplet.FileSystemFactory; //导入依赖的package包/类
public FileSystemFactory getFileSystemFactory() {
	return fileSystemFactory;
}
 

import org.apache.ftpserver.ftplet.FileSystemFactory; //导入依赖的package包/类
public void setFileSystemFactory(FileSystemFactory fileSystemFactory) {
	this.fileSystemFactory = fileSystemFactory;
}
 

import org.apache.ftpserver.ftplet.FileSystemFactory; //导入依赖的package包/类
/**
 * {@inheritDoc}
 */
@Override
protected Class<? extends FileSystemFactory> getBeanClass(
        final Element element) {
    return NativeFileSystemFactory.class;
}
 

import org.apache.ftpserver.ftplet.FileSystemFactory; //导入依赖的package包/类
/**
 * Get file system manager.
 */
public FileSystemFactory getFileSystemManager() {
    return fileSystemManager;
}
 

import org.apache.ftpserver.ftplet.FileSystemFactory; //导入依赖的package包/类
public void setFileSystemManager(FileSystemFactory fileSystemManager) {
    this.fileSystemManager = fileSystemManager;
}
 

import org.apache.ftpserver.ftplet.FileSystemFactory; //导入依赖的package包/类
public FileSystemFactory getFileSystemManager() {
    return null;
}
 

import org.apache.ftpserver.ftplet.FileSystemFactory; //导入依赖的package包/类
/**
 * Retrieve the file system used by servers created by this factory
 * 
 * @return The {@link FileSystemFactory}
 */
public FileSystemFactory getFileSystem() {
    return serverContext.getFileSystemManager();
}
 

import org.apache.ftpserver.ftplet.FileSystemFactory; //导入依赖的package包/类
/**
 * Set the file system to be used by servers created by this factory
 * 
 * @param fileSystem
 *            The {@link FileSystemFactory}
 * @throws IllegalStateException
 *             If a custom server context has been set
 */
public void setFileSystem(final FileSystemFactory fileSystem) {
    serverContext.setFileSystemManager(fileSystem);
}
 

import org.apache.ftpserver.ftplet.FileSystemFactory; //导入依赖的package包/类
/**
 * Retrieve the file system used with this server
 * 
 * @return The {@link FileSystemFactory}
 */
public FileSystemFactory getFileSystem() {
    return getServerContext().getFileSystemManager();
}