jakarta commons-net ftp的例子-优快云博客

此博客展示了用Java实现FTP连接与文件操作的代码。通过FTPClient类连接到指定FTP服务器，进行登录操作，还能切换工作目录、列出文件信息，如文件名、是否为目录、文件大小、时间戳等，若出现异常会打印堆栈信息。

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import java.io.IOException;
import java.net.SocketException;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;

import org.apache.commons.net.ftp.*;
/**
* @author Daniel Summer(danny_xcz@163.com)
*
* To change the template for this generated type comment go to
* Window>Preferences>Java>Code Generation>Code and Comments
*/
public class Test {
private static FTPClient ftp_ = new FTPClient();
;
public static void main(String[] args) {
try {
ftp_.connect("ftp.ujs.edu.cn");
System.out.println("Connecting...");
ftp_.login("anonymous", "");
System.out.println("Connetcted");
} catch (SocketException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

try {
FTPFile[] files = null;
FTPListParseEngine engine;
ftp_.changeWorkingDirectory("/");
files = ftp_.listFiles();
System.out.println("Directory is " + ftp_.printWorkingDirectory());

System.out.println(files[0].getName());
System.out.println(files[0].isDirectory());
System.out.println(files[0].getRawListing());
System.out.println("***********************");
ftp_.changeWorkingDirectory("/pub");
files = ftp_.listFiles();
System.out.println("Directory is " + ftp_.printWorkingDirectory());

System.out.println(files[1].getName());
System.out.println(files[1].isDirectory());
System.out.println(files[1].getSize());
System.out.println(files[1].getTimestamp().getTime());

DateFormat dateFormat =
new SimpleDateFormat("yyyy-MM-dd hh:mm");
System.out.println(dateFormat.format(files[1].getTimestamp().getTime()));
int idx = files[1].getRawListing().indexOf(" ");
System.out.println(files[1].getRawListing().substring(0,idx--));
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}

}
}