Java课程设计-FTP客户端-说明书

if(result==JFileChooser.APPROVE_OPTION) {

ftp.downloadFile(targetFile, fDialog.getSelectedFile().toString()); update();

status.setText(\下载文件\+targetFile+\成功\);

JOptionPane.showMessageDialog(null, \下载文件\+targetFile+\成功\);

time = new Date();

out.println(time+\下载文件:\+targetFile); } } else {

JOptionPane.showMessageDialog(null, \请选择所要下载的文件\); } }

//上一级目录

public void upDir() {

try {

ftp.up(); update(); }

catch(Exception e) {

e.printStackTrace(); } }

//下一级目录

public void downDir() {

if(!fileList.isSelectionEmpty()) {

String foldername=fileList.getSelectedValue().toString(); if(foldername.indexOf(\)==-1) {

ftp.setPath(foldername); update(); } else

{

JOptionPane.showMessageDialog(null, \请选择一个文件夹\); } } else {

JOptionPane.showMessageDialog(null, \请选择一个文件夹\); } }

//关闭连接

public void close(){ String s=ftp.close(); status.setText(s); m.removeAllElements();

time = new Date();

out.println(time+\离开服务器:\+url.getText()); out.close();

connectButton.setEnabled(true); closeButton.setEnabled(false); }

//显示日志信息

@SuppressWarnings(\) public void ShowLog() {

new LogDialog().show(); }

public static void main(String[] args) //throws Exception {

try {

UIManager.setLookAndFeel(\el\);//设置windows系统外观 }catch(Exception e) {

e.printStackTrace();//打印异常信息在程序中出错的位置及原因 }

new Ftp(); } }

(2) FtpBean.java

public class FtpBean {

private FtpClient ftpClient = null; //获取文件名列表

public List getFileNameList() throws IOException {

List fileNameList = new ArrayList();//在fileNameList中存取String类型的变量

InputStreamReader isr = null;// InputStreamReader 是字节流通向字符流的桥梁

BufferedReader br = null; try {

if(ftpClient!=null) {

isr = new

InputStreamReader(this.ftpClient.nameList(this.getDir())); br = new BufferedReader(isr); String fileName = \; while (true)

{ fileName = br.readLine(); if (fileName == null) {

break; }

fileNameList.add(fileName); } } }

finally {

if (br != null) {

try {

br.close(); }

catch (IOException e) {

e.printStackTrace(); } }

if (isr != null) {

try {

isr.close(); }

catch (IOException e) {

e.printStackTrace(); } } }

return fileNameList; }

//打开连接

public String connect(String dir, String hostname, int port, String username,String passwd) { String msg = \; try {

ftpClient = new FtpClient(hostname, port); ftpClient.login(username, passwd); ftpClient.binary();

msg = \登录主机成功！\; }

catch (FtpLoginException e) {

msg = \登录主机失败，可能是用户名密码错误！\; ftpClient=null; }

catch (IOException e) {

msg = \登录主机失败，请检验端口是否正确！\; ftpClient=null; }

catch (SecurityException e) {

msg = \无权连接主机，请确认是否有权限连接主机！\; ftpClient=null; }

return msg; }

//读取文件列表