FTP 工具类. 可以完成对目录创建的创建、修改、删除,对文件的上传下载等操作

package rewin.util;import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStream;import java.io.OutputStream;import java.net.SocketException;import java.util.ArrayList;import java.util.List;import org.apache.commons.net.ftp.FTP;import org.apache.commons.net.ftp.FTPClient;import org.apache.commons.net.ftp.FTPFile;import org.apache.commons.net.ftp.FTPReply;/** * FTP 工具类. 可以完成对目录创建的创建、修改、删除,对文件的上传下载等操作. * @author yuyoufa * @since 1.4 */public class FtpUtil {/** * FTP客户端 */private FTPClient ftp;public static final int BINARY_FILE_TYPE = FTP.BINARY_FILE_TYPE;public static final int ASCII_FILE_TYPE = FTP.ASCII_FILE_TYPE;/** * 初始化客户端并完成对服务端的连接 * @param ftpConfig ftp配置类 * @throws SocketException * @throws IOException */public void connectServer(FtpConfig ftpConfig) throws SocketException,IOException {String server = ftpConfig.getServer();int port = ftpConfig.getPort();String user = ftpConfig.getUsername();String password = ftpConfig.getPassword();String location = ftpConfig.getLocation();connectServer(server, port, user, password, location);}/** * 初始化客户端并完成对服务端的连接 * @param server 服务端地址 * @param port 端口号 * @param username 用户名 * @param password 密码 * @param path 远程路径 值可以为空 * @throws SocketException * @throws IOException */public void connectServer(String server, int port, String username,String password, String path) throws SocketException, IOException {ftp = new FTPClient();ftp.connect(server, port);ftp.setDataTimeout(120000);if (!FTPReply.isPositiveCompletion(ftp.getReplyCode())) {   ftp.disconnect();               System.out.println(server + " 拒绝连接");           }ftp.login(username, password);if (path.length() != 0) {ftp.changeWorkingDirectory(path);}}/** * 设置ftp的文件传输类型 * @param fileType 如:FTP.BINARY_FILE_TYPE * @throws IOException */public void setFileType(int fileType) throws IOException {ftp.setFileType(fileType);}/** * 关闭ftp连接 * @throws IOException */public void closeServer() throws IOException {if (ftp != null && ftp.isConnected()) {ftp.logout();ftp.disconnect();}}/** * 改变ftp的工作目录 * @param path * @return * @throws IOException */public boolean changeDirectory(String path) throws IOException {return ftp.changeWorkingDirectory(path);}/** * 在服务端创建目录 * @param pathName 可以是相对目录或绝对目录 * @return * @throws IOException */public boolean createDirectory(String pathName) throws IOException {return ftp.makeDirectory(pathName);}/** * 删除一个FTP服务器上的目录（如果为空） * @param path 目录路径 * @return * @throws IOException */public boolean removeDirectory(String path) throws IOException {return ftp.removeDirectory(path);}/** * 删除一个FTP服务器上的目录 * @param path 目录路径 * @param isAll 是否删除所有子目录和文件,如果有 * @return * @throws IOException */public boolean removeDirectory(String path, boolean isAll)throws IOException {if (!isAll) {return removeDirectory(path);}//遍历子目录和文件FTPFile[] ftpFileArr = ftp.listFiles(path);if (ftpFileArr == null || ftpFileArr.length == 0) {return removeDirectory(path);}for (int i = 0; i < ftpFileArr.length; i++) {FTPFile ftpFile = ftpFileArr[i];String name = ftpFile.getName();if (ftpFile.isDirectory()) {removeDirectory(path + "/" + name, true);} else if (ftpFile.isFile()) {deleteFile(path + "/" + name);} else if (ftpFile.isSymbolicLink()) {} else if (ftpFile.isUnknown()) {}}return removeDirectory(path);}/** * 返回给定目录下的文件 * @param path * @return FTPFile组成的集合 * @throws IOException */public List getFileList(String path) throws IOException {FTPFile[] ftpFiles = ftp.listFiles(path);List retList = new ArrayList();if (ftpFiles == null || ftpFiles.length == 0) {return retList;}for (int i = 0; i < ftpFiles.length; i++) {FTPFile ftpFile = ftpFiles[i];if (ftpFile.isFile()) {retList.add(ftpFile.getName());}}return retList;}/** * 删除文件 * @param pathName 文件名 * @return 删除结果,是否成功. * @throws IOException */public boolean deleteFile(String pathName) throws IOException {return ftp.deleteFile(pathName);}/** * 上传文件,并重命名. * @param fileName 上传的文件,包含目录的文件名 * @param newName 新的文件名 * @return 上传结果,是否成功. * @throws IOException */public boolean uploadFile(String fileName, String newName)throws IOException {boolean flag = false;InputStream iStream = null;try {iStream = new FileInputStream(fileName);flag = ftp.storeFile(newName, iStream);} catch (IOException e) {flag = false;return flag;} finally {if (iStream != null) {iStream.close();}}return flag;}/** * 上传文件 * @param fileName 上传的文件,包含目录的文件名 * @return 上传结果,是否成功. * @throws IOException */public boolean uploadFile(String fileName) throws IOException {return uploadFile(fileName, fileName);}/** * 上传文件,从InputStream * @param iStream 文件流 * @param newName 新的文件名 * @return 上传结果,是否成功. * @throws IOException */public boolean uploadFile(InputStream iStream, String newName)throws IOException {boolean flag = false;try {flag = ftp.storeFile(newName, iStream);} catch (IOException e) {flag = false;return flag;} finally {if (iStream != null) {iStream.close();}}return flag;}/** * 下载文件 * @param remoteFileName 远程文件名 * @param localFileName 本地文件 * @return 返回操作结果 * @throws IOException */public boolean download(String remoteFileName, String localFileName)throws IOException {boolean flag = false;File outfile = new File(localFileName);OutputStream oStream = null;try {oStream = new FileOutputStream(outfile);flag = ftp.retrieveFile(remoteFileName, oStream);} catch (IOException e) {flag = false;return flag;} finally {oStream.close();}return flag;}/** * 下载文件,返回InputStream * @param sourceFileName 远程文件 * @return InputStream * @throws IOException */public InputStream downFile(String sourceFileName) throws IOException {return ftp.retrieveFileStream(sourceFileName);}public FTPClient getFtp() {return ftp;}public void setFtp(FTPClient ftp) {this.ftp = ftp;}}