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這是偶第一次寫java程序實現公司要求的FTP數據同步，所有原代碼如下，以供各位參考并提出寶貴意見！另外俺還有兩個功能沒有實現，有請高手指點一二：1、如何刪除FTP服務器上已經下載過的文件？2、如何將上傳的文件改名？上傳時在文件名前加“temp_”，上傳完畢后需要把文件名改回來。3、如何使用openPassiveDataConnection()方法將ftp連接更改為主動連接，因為要從unix系統配置的ftp服務器下載文件的話，就需要主動連接。
/*
*******************************************************************************************************
Filename: ftp.java
Author: leetsing(elove)
Create date: 2004-08-30
Use: connect to FTP server,then upload and download file
Modify date: 2004-09-05 add to upload file
2004-09-13 add to download file
Copy right: Magisky Media Technology Co.,Ltd.
*******************************************************************************************************
*/
//import cz.dhl.io.*;
//import cz.dhl.ftp.*;
import sun.net.ftp.*;
import sun.net.*;
import java.applet.*;
import java.io.*;
import java.io.IOException;
import java.util.StringTokenizer;
import sun.net.ftp.FtpClient;
import java.util.ArrayList;
public class ftp extends Applet
{
FtpClient aftp;
DataOutputStream outputs ;
TelnetInputStream ins;
TelnetOutputStream outs;
int ch;
public String a;
String hostname="";
private String path = "/";
public static void main(String[] args)
{
String hostname = "192.168.0.56";
int port = 2121;
String uid = "lee";
String pwd = "lee";
String RWFileDir = "D:\\smsftp\\";//文件目錄
//連接ftp服務器
ftp ft = new ftp();
ft.connect(RWFileDir,hostname,port,uid,pwd);
//下載文件
if (ft.aftp != null){
try {
ft.getNameList(RWFileDir);
}catch(IOException e)
{
System.out.println("下載文件出錯："+e);
}
}
//上傳文件
if (ft.aftp != null){
String sdir = RWFileDir + "subunsubfromsp\\";
File fdir = new File(sdir);
String FileName = "";
for(int i=0;i FileName = sdir + (fdir.list())[i];
ft.uploadFile(RWFileDir,FileName);
}
//System.out.println("成功上傳的文件：");
//ft.showFileContents("subunsubfromsp\\");
}
//刪除subunsubfromsp目錄下已經上傳的文件文件
// ft.deleFile(RWFileDir);
//斷開服務器連接
ft.stop(RWFileDir);
}
public FtpClient connect(String RWFileDir,String hostname,int port,String uid,String pwd)
{
this.hostname = hostname;
System.out.println("正在連接"+hostname+"，請等待.....");
try{
aftp = new FtpClient(hostname,port);
aftp.login(uid,pwd);
aftp.binary();
//aftp.openPortDataConnection();
a = "連接主機:"+hostname+"成功!";
System.out.println(a);
}
catch(FtpLoginException e){
a="登陸主機:"+hostname+"失敗!請檢查用戶名或密碼是否正確："+e;
System.out.println(a);
//return false;
}
catch (IOException e){
a="連接主機:"+hostname+"失敗!請檢查端口是否正確："+e;
System.out.println(a);
//return false;
}
catch(SecurityException e)
{
a="無權限與主機:"+hostname+"連接!請檢查是否有訪問權限："+e;
System.out.println(a);
//return false;
}
log(RWFileDir,a);
return aftp;
}
public void stop(String RWFileDir)
{
String message = "";
try {
if(aftp!=null){
aftp.closeServer();
message = "與主機"+hostname+"連接已斷開!";
System.out.println(message);
log(RWFileDir,message);
}
}
catch(IOException e)
{
message = "與主機"+hostname+"斷開連接失敗!"+e;
System.out.println(message);
log(RWFileDir,message);
}
}
public boolean downloadFile(String RWFileDir,String filepathname){
boolean result=true;
String message = "";
if (aftp != null)
{
System.out.println("正在下載文件"+filepathname+",請等待....");
String badfile = filepathname.substring(filepathname.length()-4,filepathname.length());
String badlog = filepathname.substring(filepathname.length()-7,filepathname.length());
String baddir = "";
if ((badfile.compareTo(".bad") != 0) && (badlog.compareTo(".badlog") != 0)){
baddir = "subunsubtosp\\";
}
else{
baddir = "bad\\";
}
String strdir = "subunsubtosp\\";
//System.out.println(RWFileDir + baddir + filepathname);
try{
//FtpClient fc=new FtpClient("192.168.0.56",2121);
//fc.login("lee","lee");
int ch;
File fi = new File(RWFileDir + baddir + filepathname);
//aftp.cd(strdir);
RandomAccessFile getFile = new RandomAccessFile(fi,"rw");
getFile.seek(0);
TelnetInputStream fget=aftp.get(strdir+filepathname);
DataInputStream puts = new DataInputStream(fget);
while ((ch = puts.read()) >= 0) {
getFile.write(ch);
}
//s.delete();
fget.close();
getFile.close();
//fc.closeServer();
message = "下載"+filepathname+"文件到"+baddir +"目錄成功!";
System.out.println(message);
log(RWFileDir,message);
}
catch(IOException e){
message = "下載"+filepathname+"文件到"+baddir +"目錄失敗!"+e;
System.out.println(message);
log(RWFileDir,message);
result = false ;
}
}
else{
result = false;
}
return result;
}
public boolean uploadFile(String RWFileDir,String filepathname){
boolean result=true;
String message = "";
if (aftp != null)
{
System.out.println("正在上傳文件"+filepathname+",請等待....");
try{
String fg =new String("\\subunsubfromsp\\");
int index = filepathname.lastIndexOf(fg);
String filename = filepathname.substring(index+1);
File localFile = new File(filepathname) ;
RandomAccessFile sendFile = new RandomAccessFile(filepathname,"r");
//
sendFile.seek(0);
//改名上傳temp_
filename = filename.substring(0,15)+"temp_"+filename.substring(15,filename.length());
outs = aftp.put(filename);
outputs = new DataOutputStream(outs);
while (sendFile.getFilePointer() < sendFile.length() )
{
ch = sendFile.read();
outputs.write(ch);
}
rename(filename.substring(15,filename.length()),filename.substring(20,filename.length()));
outs.close();
sendFile.close();
message = "上傳"+filepathname+"文件成功!";
System.out.println(message);
log(RWFileDir,message);
}
catch(IOException e){
message = "上傳"+filepathname+"文件失敗!"+e;
System.out.println(message);
log(RWFileDir,message);
result = false ;
}
}
else{
result = false;
}
return result;
}
public void rename(String oldName,String newName){
//aftp.renameTo(oldName,newName);
File Old = new File(oldName); //oldName
File New = new File(newName); //newName
//aftp.renameTo(New);
//boolean Old.renameTo(File newName);
//System.out.println(Old);
//System.out.println(New);
}
public static void deleFile(String RWFileDir) {
//try {
//取得ReadFile目錄下的txt文件
String sdir = RWFileDir + "subunsubfromsp\\";
File fdir = new File(sdir);
String FileName = "";
int j = fdir.list().length;
System.out.println(sdir+"目錄下要刪除的文件數："+fdir.list().length);
File file;
for(int i=0;i {
//刪除subunsubfromsp中的txt文件
FileName = RWFileDir + "subunsubfromsp\\" + (fdir.list())[0];
file = new File(FileName);
file.delete();
System.out.println("已經成功刪除"+FileName+"文件！");
}
//}
//catch (IOException e) {
// System.out.println("刪除txt文件錯誤!");
// e.printStackTrace();
//}
}
public void showFileContents(String strdir)
{
StringBuffer buf = new StringBuffer();
try {
aftp.cd(strdir);
ins= aftp.list();
while ((ch=ins.read())>=0){
buf.append((char)ch);
}
System.out.println(buf.toString());
ins.close();
}
catch(IOException e)
{
}
}
// 返回當前目錄的所有文件及文件夾
public ArrayList getFileList() throws IOException {
BufferedReader dr = new BufferedReader(new InputStreamReader(aftp.list()));
ArrayList al = new ArrayList();
String s = "";
while ( (s = dr.readLine()) != null) {
al.add(s);
}
return al;
}
public void setPath(String path) throws IOException {
if (aftp == null)
this.path = path;
else {
aftp.cd(path);
}
}
// 返回當前目錄的文件名稱
public ArrayList getNameList(String RWFileDir) throws IOException {
BufferedReader dr = new BufferedReader(new InputStreamReader(aftp.nameList("subunsubtosp\\")));
ArrayList al = new ArrayList();
String s = "";
while ( (s = dr.readLine()) != null) {
al.add(s);
s = s.substring(13,s.length());
isFile(s);
downloadFile(RWFileDir,s);
//String strFileDelF = aftp.nameList("subunsubtosp\\");
File fileDelF=new File(s);
fileDelF.delete();
}
return al;
//System.out.println(al.add(s));
}
// 判斷一行文件信息是否為目錄
public boolean isDir(String line) {
return ( (String) parseLine(line).get(0)).indexOf("d") != -1;
}
public boolean isFile(String line) {
return!isDir(line);
}
// 處理getFileList取得的行信息
private ArrayList parseLine(String line) {
ArrayList s1 = new ArrayList();
StringTokenizer st = new StringTokenizer(line, " ");
while (st.hasMoreTokens()) {
s1.add(st.nextToken());
}
return s1;
}
//寫消息日志
public static void log(String RWFileDir,String msg)
{
String message = "";
try {
java.text.DateFormat df = new java.text.SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
java.text.DateFormat dflog = new java.text.SimpleDateFormat("yyyyMMdd");
java.util.Date date = new java.util.Date() ;
String datestr = df.format(new java.util.Date()) ;
String datelog = dflog.format(new java.util.Date()) ;
//String datelog = datestr.substring(0,10);
//datelog = datelog.replace('-',' ');
//按日期每天生成一個日志文件
FileWriter fwl = new FileWriter(RWFileDir + "CMSSftp"+datelog+".log",true);
PrintWriter outl = new PrintWriter(fwl);
outl.println(datestr + " " + msg);
outl.close();
fwl.close();
}catch (IOException e) {
message = "寫log文件錯誤!"+e;
e.printStackTrace();
log(RWFileDir,message);
System.out.println(message);
}
}
}
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