FTP传输和下载文件

public class FTPUtils {FTPClient ftp;/** * 登陆FTP *  * @param user 登陆用户名 * @param password 登录密码 * @throws Exception */public void init(String IP,String user, String password) throws Exception { // 初始化函数try {ftp = new FTPClient(IP); //建立连接ftp.login(user, password); //登录} catch (Exception e) {e.printStackTrace();}}/** * 从FTP服务器上获取文件信息，包含登陆FTP流程 *  * @param ipAddress FTP服务器的ip地址 * @param user 登陆用户名 * @param password 登录密码 * @return sourceFile 要获取的文件(含路径+文件名)，例如/home/viewuser/nohup.out * @throws Exception */public String doFtpConnect(String ipAddress, String user, String password,String sourceFile) {ByteArrayOutputStream streamXML = null;String strSendMsg = "";try {FTPClient ftp = new FTPClient(ipAddress); //建立连接streamXML = new ByteArrayOutputStream();ftp.login(user, password); //登录//ftp.get("D:/zy/"+fileName,"/home/viewuser/nohup.out");     //生成下载文件ftp.get(streamXML, sourceFile); //生成输出流strSendMsg = streamXML.toString();} catch (Exception e) {e.printStackTrace();}return strSendMsg;}/** * 从FTP服务器上获取文件信息，不包含登陆FTP流程。 *  * @param user 登陆用户名 * @param password 登录密码 * @return sourceFile 要获取的文件(含路径+文件名)，例如/home/viewuser/nohup.out * @throws Exception */public String doFtpConnect(String sourceFile) {ByteArrayOutputStream streamXML = null;String strSendMsg = "";try {streamXML = new ByteArrayOutputStream();//ftp.get("D:/zy/"+fileName,"/home/viewuser/nohup.out");     //生成下载文件ftp.get(streamXML, sourceFile); //生成输出流strSendMsg = streamXML.toString();} catch (Exception e) {e.printStackTrace();}return strSendMsg;}/** * 向FTP服务器传送fileName文件 *  * @param localPath 本地文件路径 * @param ftpPath FTP服务器文件路径 * @param fileName 文件名称 * @return content 服务器fileName文件及其路径 * @throws Exception */public String putFtpFile(String localPath,String ftpPath,String fileName){String content = "";localPath = localPath+fileName;ftpPath = ftpPath+fileName;System.out.println("FTPUtils: localPath==="+localPath);System.out.println("FTPUtils: ftpPath==="+ftpPath);try {content = ftp.put(localPath,ftpPath);}catch (Exception e){e.printStackTrace();}return content;}/** * 向FTP服务器传送字符串，生成fileName文件 *  * @param sendMsg 向服务器发送信息 * @param ftpfile FTP服务器文件路径 * @param fileName 文件名称 * @return content 服务器fileName文件及其路径 * @throws Exception */public String putFtpMsg(String sendMsg,String ftpPath,String fileName){String content = "";ftpPath = ftpPath + fileName;System.out.println("FTPUtils: ftpPath==="+ftpPath);InputStream input = new StringBufferInputStream(sendMsg); try {content = ftp.put(input,ftpPath);}catch (Exception e){e.printStackTrace();}return content;}}