FTP连接代码，可浏览FTP等

最新推荐文章于 2023-05-11 10:22:30 发布

weixin_30419799

最新推荐文章于 2023-05-11 10:22:30 发布

阅读量178

点赞数

CC 4.0 BY-SA版权

文章标签： java

原文链接：http://www.cnblogs.com/xnxqs/archive/2005/07/29/202861.html

该博客提供了Java实现的FTP连接代码，适用于管理员操作。代码包含单例类获取实例、连接FTP、关闭FTP、获取文件列表等功能，可用于浏览FTP，还提供了判断文件信息、处理文件行信息等方法。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

/**
* FTP连接代码，可浏览FTP等
* 仅适用于管理员操作，不适合普通用
*
* Title: 冰云工作室
* Description: 
* Copyright: Copyright (c) 2003
* Company: 
* @author 冰云
* @version 1.0 August.23rd 2003
*/
public class FTPConnection {
FtpClient client;
private String host;
private String username;
private String password;
private String path = "/";
private int port = 21;
private static FTPConnection instance;

private FTPConnection() {
}

// 单例类的方法，获得唯一实例

public static FTPConnection getInstance() {
    if (instance == null) {
      instance = new FTPConnection();
    }
    return instance;
}

// 连接FTP，并进入当前的path

public void connect() throws IOException {
    if (client == null) {
      client = new FtpClient(host, port);
      client.login(username, password);
      client.binary();
      client.cd(path);
    }
    else {
      client.noop();
      client.cd(path);
    }
}

// 关闭FTP

public void close() throws IOException {
    if (client != null) {
      client.closeServer();
    }
}

  // 获得FTPClient类，可以直接对其操作

public FtpClient getClient() throws IOException {
    if (client == null) {
      connect();
    }
    return client;
}

// 返回当前目录的所有文件及文件夹

public ArrayList getFileList() throws IOException {
    BufferedReader dr = new BufferedReader(new InputStreamReader(client.list()));
    ArrayList al = new ArrayList();
    String s = "";
    while ( (s = dr.readLine()) != null) {
      al.add(s);
    }
    return al;
}

// 返回当前目录的文件名称

public ArrayList getNameList() throws IOException {
    BufferedReader dr = new BufferedReader(new InputStreamReader(client.
        nameList(path)));
    ArrayList al = new ArrayList();
    String s = "";
    while ( (s = dr.readLine()) != null) {
      al.add(s);
    }
    return al;
}

// 判断一行文件信息是否为目录

public boolean isDir(String line) {
return ( (String) parseLine(line).get(0)).indexOf("d") != -1;
}

public boolean isFile(String line) {
return!isDir(line);
}

// 处理getFileList取得的行信息

private ArrayList parseLine(String line) {
    ArrayList s1 = new ArrayList();
    StringTokenizer st = new StringTokenizer(line, " ");
    while (st.hasMoreTokens()) {
      s1.add(st.nextToken());
    }
    return s1;
}

public String getFileName(String line) {
return ( (String) parseLine(line).get(8));
}

public String getFileSize(String line) {
return (String) parseLine(line).get(4);
}

public String getFileDate(String line) {
ArrayList a = parseLine(line);
return (String) a.get(5) + " " + (String) a.get(6) + " " + (String) a.get(7);

转载于:https://www.cnblogs.com/xnxqs/archive/2005/07/29/202861.html