Java进行FTP操作

Java进行FTP操作，采用的是Apache的FTPClient操作，需要引入commons-net包

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

import org.apache.commons.io.IOUtils;
import org.apache.commons.net.ftp.FTPClient;

/**
 * class name:FTPFileTransmit 

 * class description: please write your description 

 * Remark: 

 * @version 1.00 2011-8-9
 */
public class FTPFileTransmit {

	private String ftpPath;
	private String ftpName;
	private String ftpPassword;
	private String ftpServerIP;
	
	public FTPFileTransmit() {
		this.ftpPath = "xxx/xxx/";
		this.ftpName = "name";
		this.ftpPassword = "pass";
		this.ftpServerIP = "192.168.0.xx";
	}
	
	
	/**
	 * Method name: saveInFTP 

	 * Description: 把文件存储在FTP上 

	 * Remark: 

	 * @param FolderName 			示例"xxx/xxx/"
	 * @param FileName 				示例"thefilename"
	 * @param data					byte[]数组
	 * @return  boolean

	 */
	public boolean saveInFTP (String FolderName, String FileName, byte[] data) {
		boolean flag = false;
		
		// 创建FTP客户端
		FTPClient ftpClient = new FTPClient();
		// 输入流用于读取文件
//		FileInputStream fis = null;
		ByteArrayInputStream bis = null;
		
		try {
			// 如果FolderName 和 FileName都不符合基本要求, 那么就没有必要进行ftp操作
			if (FolderName != null
					&& FolderName.compareTo("") != 0
					&& FileName != null
					&& FileName.compareTo("") != 0) {

				// 建立FTP连接
				ftpClient.connect(this.ftpServerIP);
				
				// 如果登录成功后, 才进行创建输入流
				if (ftpClient.login(this.ftpName, this.ftpPassword)) {
//					File srcClientFile = new File("C:/ParseXML.xml");
					
					// 实例化输入流
//					fis = new FileInputStream(srcClientFile);
					
					if (ftpClient.changeWorkingDirectory(FolderName)) {
						// 将byte[]写入到输入流中, 实例化
						bis = new ByteArrayInputStream(data);
						
						// 设置缓冲
						ftpClient.setBufferSize(1024);
						
						// 设置文件类型(二进制类型)
						if (ftpClient.setFileType(FTPClient.BINARY_FILE_TYPE)) {
							flag = ftpClient.storeFile(FileName, bis);
						}
					}
				}
			}
		} catch (SocketException e) {
			e.printStackTrace();
			flag = false;
		} catch (IOException e) {
			e.printStackTrace();
			flag = false;
		} catch (Exception e) {
			e.printStackTrace();
			flag = false;
		} finally {
			try {
				// 关闭输入流
				IOUtils.closeQuietly(bis);
				// 关闭连接
				ftpClient.disconnect();
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
		
		return flag;
	}
	
	/**
	 * Method name: getFromFTP 

	 * Description: 从FTP上读取文件 

	 * Remark: 

	 * @return  boolean

	 */
	public boolean getFromFTP () {
		boolean flag = false;
		
		// 创建FTP客户端
		FTPClient ftpClient = new FTPClient();
		// 输出流用于输出文件
		FileOutputStream fos = null;
		
		try {
			// 建立FTP连接
			ftpClient.connect(this.ftpServerIP);
			// 如果登录成功后, 才进行创建输出流
			if (ftpClient.login(this.ftpName, this.ftpPassword)) {
				// FTP文件
				String distinationFile = "/name/xxx/xxx/xxx文件";
				// 实例化输出流
				fos = new FileOutputStream("C:/ParseXML_InFTP.xml");
				
				// 设置缓冲
				ftpClient.setBufferSize(1024);
				
				// 设置文件类型(二进制类型)
				if (ftpClient.setFileType(FTPClient.BINARY_FILE_TYPE)) {
					ftpClient.retrieveFile(distinationFile, fos);
					flag = true;
				}
			}
		} catch (SocketException e) {
			e.printStackTrace();
			flag = false;
		} catch (IOException e) {
			e.printStackTrace();
			flag = false;
		} catch (Exception e) {
			e.printStackTrace();
			flag = false;
		} finally {
			try {
				// 关闭输出流
				IOUtils.closeQuietly(fos);
				// 关闭连接
				ftpClient.disconnect();
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
		
		return flag;
	}

	public boolean createDirectory() {
		boolean flag = false;
		
		// 创建FTP客户端
		FTPClient ftpClient = new FTPClient();
		
		try {
			// 建立FTP连接
			ftpClient.connect(this.ftpServerIP);
			// 如果登录成功后, 才进行操作
			if (ftpClient.login(this.ftpName, this.ftpPassword)) {
				
				// 切换文件路径, 到FTP上的"NNDD3"文件夹下
				if (this.ftpPath != null && this.ftpPath.compareTo("") != 0
						&& ftpClient.changeWorkingDirectory(this.ftpPath)) {
					SimpleDateFormat f = new SimpleDateFormat("yyyyMMdd");
					String time = f.format(new Date());
					
					String FolderName = time + "_ReTransmit";
					ftpClient.makeDirectory(FolderName);
					flag = true;
				}
			}
		} catch (SocketException e) {
			e.printStackTrace();
			flag = false;
		} catch (IOException e) {
			e.printStackTrace();
			flag = false;
		} catch (Exception e) {
			e.printStackTrace();
			flag = false;
		} finally {
			try {
				// 关闭连接
				ftpClient.disconnect();
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
		
		return flag;
	}
		
	public String[] getAllFolderNames () {
		// 创建FTP客户端
		FTPClient ftpClient = new FTPClient();
		
		try {
			// 建立FTP连接
			ftpClient.connect(this.ftpServerIP);
			
			// 如果登录成功后, 才进行操作
			if (ftpClient.login(this.ftpName, this.ftpPassword)) {
				
				// 切换文件路径, 到FTP上的"NNDD3"文件夹下
				if (this.ftpPath != null && this.ftpPath.compareTo("") != 0
						&& ftpClient.changeWorkingDirectory(this.ftpPath)) {
					// 将当前时间减去2天, 删除的是前两天的数据包
					String time = minusTime();
		
					String[] allNames = ftpClient.listNames();
					
					String[] temp = new String[allNames.length];
					// 初始化数组
					for (int j = 0; j < allNames.length; j ++) {
						temp[j] = "";
					}
					
					// 找出要删除文件夹的名称
					for (int i = 0; i < allNames.length; i ++) {
						if (allNames[i].substring(0, 8).compareTo(time) <= 0) {
							temp[i] = allNames[i];
						}
					}
					
					return temp;
				}
			}
		} catch (SocketException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		} finally {
			try {
				// 关闭连接
				ftpClient.disconnect();
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
		
		return null;
	}

	/**
	 * 
	 * Method name: minusTime 

	 * Description: 获取钱两天的时间,如2011-8-1的前两天就是2011-7-30 

	 * Remark: 

	 * @return  String

	 */
	private String minusTime() {
		SimpleDateFormat df=new SimpleDateFormat("yyyyMMdd");   
		Date d = new Date();
        String timeMinus2 = df.format(new Date(d.getTime() - 2 * 24 * 60 * 60 * 1000));   
		return timeMinus2;
	}
	
	public static void main(String[] args) {
		FTPFileTransmit ftpFileTransmit = new FTPFileTransmit();
		ftpFileTransmit.deleteFoldersInFTP();
		
//		boolean flag = ftpFileTransmit.createDirectory();
//		if (flag) {
//			System.out.println("****** FTP文件夹创建成功 ******");
//		}
		
//		String FolderName = ftpFileTransmit.ftpPath + "20110809_ReTransmit/";
//		byte[] data = new byte[1024];
//		for (int i = 0; i < data.length; i ++) {
//			data[i] = 'a';
//		}
//		boolean flag = ftpFileTransmit.saveInFTP(FolderName, "2011080912345678" ,data);
//		if (flag) {
//			System.out.println("****** FTP文件夹创建成功 ******");
//		}
	}
}