java上传文件到FTP服务器

 在JAVA程序中，经常需要和FTP打交道，比如向FTP服务器上传文件、下载文件，本文简单介绍如何利用jakarta commons中的FTPClient（在commons-net包中）实现上传下载文件。

commons-net-1.4.1.jar 

public static String ftpUpload(String url, String port, String username,

String password, String remotePath, String fileNamePath,

String fileName) {

FTPClient ftpClient = new FTPClient();

FileInputStream fis = null;

String returnMessage = "0";

try {

ftpClient.connect(url, Integer.parseInt(port));

boolean loginResult = ftpClient.login(username, password);

int returnCode = ftpClient.getReplyCode();

if (loginResult && FTPReply.isPositiveCompletion(returnCode)) {// 如果登录成功

ftpClient.makeDirectory(remotePath);

// 设置上传目录

ftpClient.changeWorkingDirectory(remotePath);

ftpClient.setBufferSize(1024);

ftpClient.setControlEncoding("UTF-8");

ftpClient.enterLocalPassiveMode();

fis = new FileInputStream(fileNamePath + fileName);

ftpClient.storeFile(fileName, fis);

 

returnMessage = "1"; // 上传成功

} else {// 如果登录失败

returnMessage = "0";

}

 

} catch (IOException e) {

e.printStackTrace();

throw new RuntimeException("FTP客户端出错！", e);

} finally {

// IOUtils.closeQuietly(fis);

try {

ftpClient.disconnect();

} catch (IOException e) {

e.printStackTrace();

throw new RuntimeException("关闭FTP连接发生异常！", e);

}

}

return returnMessage;

}