拿去用吧。
package com.weixin.utilimport java.io.File
import java.io.FileOutputStream
import java.io.IOException
import java.io.InputStream
import java.io.OutputStream
import java.io.PrintWriter
import java.io.RandomAccessFile
import org.apache.commons.net.PrintCommandListener
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
import com.weixin.constant.DownloadStatus
import com.weixin.constant.UploadStatus
/**
* 支持断点续传的FTP实用类
* @version 0.1 实现基本断点上传下载
* @version 0.2 实现上传下载进度汇报
* @version 0.3 实现中文目录创建及中文文件创建，添加对于中文的支持
*/
public class ContinueFTP {
public FTPClient ftpClient = new FTPClient()
public ContinueFTP(){
//设置将过程中使用到的命令输出到控制台
this.ftpClient.addProtocolCommandListener(new PrintCommandListener(new PrintWriter(System.out)))
}
/**
* 连接到FTP服务器
* @param hostname 主机名
* @param port 端口
* @param username 用户名
* @param password 密码
* @return 是否连接成功
* @throws IOException
*/
public boolean connect(String hostname,int port,String username,String password) throws IOException{
ftpClient.connect(hostname, port)
ftpClient.setControlEncoding("GBK")
if(FTPReply.isPositiveCompletion(ftpClient.getReplyCode())){
if(ftpClient.login(username, password)){
return true
}
}
disconnect()
return false
}
/**
* 从FTP服务器上下载文件,支持断点续传，上传百分比汇报
* @param remote 远程文件路径
* @param local 本地文件路径
* @return 上传的状态
* @throws IOException
*/
public DownloadStatus download(String remote,String local) throws IOException{
//设置被动模式
ftpClient.enterLocalPassiveMode()
//设置以二进制方式传输
ftpClient.setFileType(FTP.BINARY_FILE_TYPE)
DownloadStatus result
//检查远程文件是否存在
FTPFile[] files = ftpClient.listFiles(new String(remote.getBytes("GBK"),"iso-8859-1"))
if(files.length != 1){
System.out.println("远程文件不存在")
return DownloadStatus.Remote_File_Noexist
}
long lRemoteSize = files[0].getSize()
File f = new File(local)
//本地存在文件，进行断点下载
if(f.exists()){
long localSize = f.length()
//判断本地文件大小是否大于远程文件大小
if(localSize >= lRemoteSize){
System.out.println("本地文件大于远程文件，下载中止")
return DownloadStatus.Local_Bigger_Remote
}
//进行断点续传，并记录状态
FileOutputStream out = new FileOutputStream(f,true)
ftpClient.setRestartOffset(localSize)
InputStream in = ftpClient.retrieveFileStream(new String(remote.getBytes("GBK"),"iso-8859-1"))
byte[] bytes = new byte[1024]
long step = lRemoteSize /100
long process=localSize /step
int c
while((c = in.read(bytes))!= -1){
out.write(bytes,0,c)
localSize+=c
long nowProcess = localSize /step
if(nowProcess > process){
process = nowProcess
if(process % 10 == 0)
System.out.println("下载进度："+process)
//TODO 更新文件下载进度,值存放在process变量中
}
}
in.close()
out.close()
boolean isDo = ftpClient.completePendingCommand()
if(isDo){
result = DownloadStatus.Download_From_Break_Success
}else {
result = DownloadStatus.Download_From_Break_Failed
}
}else {
OutputStream out = new FileOutputStream(f)
InputStream in= ftpClient.retrieveFileStream(new String(remote.getBytes("GBK"),"iso-8859-1"))
byte[] bytes = new byte[1024]
long step = lRemoteSize /100
long process=0
long localSize = 0L
int c
while((c = in.read(bytes))!= -1){
out.write(bytes, 0, c)
localSize+=c
long nowProcess = localSize /step
if(nowProcess > process){
process = nowProcess
if(process % 10 == 0)
System.out.println("下载进度："+process)
//TODO 更新文件下载进度,值存放在process变量中
}
}
in.close()
out.close()
boolean upNewStatus = ftpClient.completePendingCommand()
if(upNewStatus){
result = DownloadStatus.Download_New_Success
}else {
result = DownloadStatus.Download_New_Failed
}
}
return result
}
/**
* 上传文件到FTP服务器，支持断点续传
* @param local 本地文件名称，绝对路径
* @param remote 远程文件路径，使用/home/directory1/subdirectory/file.ext 按照Linux上的路径指定方式，支持多级目录嵌套，支持递归创建不存在的目录结构
* @return 上传结果
* @throws IOException
*/
public UploadStatus upload(String local,String remote) throws IOException{
//设置PassiveMode传输
ftpClient.enterLocalPassiveMode()
//设置以二进制流的方式传输
ftpClient.setFileType(FTP.BINARY_FILE_TYPE)
ftpClient.setControlEncoding("GBK")
UploadStatus result
//对远程目录的处理
String remoteFileName = remote
if(remote.contains("/")){
remoteFileName = remote.substring(remote.lastIndexOf("/")+1)
//创建服务器远程目录结构，创建失败直接返回
if(CreateDirecroty(remote, ftpClient)==UploadStatus.Create_Directory_Fail){
return UploadStatus.Create_Directory_Fail
}
}
//检查远程是否存在文件
FTPFile[] files = ftpClient.listFiles(new String(remoteFileName.getBytes("GBK"),"iso-8859-1"))
if(files.length == 1){
long remoteSize = files[0].getSize()
File f = new File(local)
long localSize = f.length()
if(remoteSize==localSize){
return UploadStatus.File_Exits
}else if(remoteSize > localSize){
return UploadStatus.Remote_Bigger_Local
}
//尝试移动文件内读取指针,实现断点续传
result = uploadFile(remoteFileName, f, ftpClient, remoteSize)
//如果断点续传没有成功，则删除服务器上文件，重新上传
if(result == UploadStatus.Upload_From_Break_Failed){
if(!ftpClient.deleteFile(remoteFileName)){
return UploadStatus.Delete_Remote_Faild
}
result = uploadFile(remoteFileName, f, ftpClient, 0)
}
}else {
result = uploadFile(remoteFileName, new File(local), ftpClient, 0)
}
return result
}
/**
* 断开与远程服务器的连接
* @throws IOException
*/
public void disconnect() throws IOException{
if(ftpClient.isConnected()){
ftpClient.disconnect()
}
}
/**
* 递归创建远程服务器目录
* @param remote 远程服务器文件绝对路径
* @param ftpClient FTPClient对象
* @return 目录创建是否成功
* @throws IOException
*/
public UploadStatus CreateDirecroty(String remote,FTPClient ftpClient) throws IOException{
UploadStatus status = UploadStatus.Create_Directory_Success
String directory = remote.substring(0,remote.lastIndexOf("/")+1)
if(!directory.equalsIgnoreCase("/")&&!ftpClient.changeWorkingDirectory(new String(directory.getBytes("GBK"),"iso-8859-1"))){
//如果远程目录不存在，则递归创建远程服务器目录
int start=0
int end = 0
if(directory.startsWith("/")){
start = 1
}else{
start = 0
}
end = directory.indexOf("/",start)
while(true){
String subDirectory = new String(remote.substring(start,end).getBytes("GBK"),"iso-8859-1")
if(!ftpClient.changeWorkingDirectory(subDirectory)){
if(ftpClient.makeDirectory(subDirectory)){
ftpClient.changeWorkingDirectory(subDirectory)
}else {
System.out.println("创建目录失败")
return UploadStatus.Create_Directory_Fail
}
}
start = end + 1
end = directory.indexOf("/",start)
//检查所有目录是否创建完毕
if(end <= start){
break
}
}
}
return status
}
/**
* 上传文件到服务器,新上传和断点续传
* @param remoteFile 远程文件名，在上传之前已经将服务器工作目录做了改变
* @param localFile 本地文件File句柄，绝对路径
* @param processStep 需要显示的处理进度步进值
* @param ftpClient FTPClient引用
* @return
* @throws IOException
*/
public UploadStatus uploadFile(String remoteFile,File localFile,FTPClient ftpClient,long remoteSize) throws IOException{
UploadStatus status
//显示进度的上传
long step = localFile.length() / 100
long process = 0
long localreadbytes = 0L
RandomAccessFile raf = new RandomAccessFile(localFile,"r")
OutputStream out = ftpClient.appendFileStream(new String(remoteFile.getBytes("GBK"),"iso-8859-1"))
//断点续传
if(remoteSize>0){
ftpClient.setRestartOffset(remoteSize)
process = remoteSize /step
raf.seek(remoteSize)
localreadbytes = remoteSize
}
byte[] bytes = new byte[1024]
int c
while((c = raf.read(bytes))!= -1){
out.write(bytes,0,c)
localreadbytes+=c
if(localreadbytes / step != process){
process = localreadbytes / step
System.out.println("上传进度:" + process)
//TODO 汇报上传状态
}
}
out.flush()
raf.close()
out.close()
boolean result =ftpClient.completePendingCommand()
if(remoteSize > 0){
status = result?UploadStatus.Upload_From_Break_Success:UploadStatus.Upload_From_Break_Failed
}else {
status = result?UploadStatus.Upload_New_File_Success:UploadStatus.Upload_New_File_Failed
}
return status
}
public static void main(String[] args) {
ContinueFTP myFtp = new ContinueFTP()
try {
System.err.println(myFtp.connect("10.10.6.236", 21, "5", "jieyan"))
// myFtp.ftpClient.makeDirectory(new String("歌曲".getBytes("GBK"),"iso-8859-1"))
// myFtp.ftpClient.changeWorkingDirectory(new String("歌曲".getBytes("GBK"),"iso-8859-1"))
// myFtp.ftpClient.makeDirectory(new String("爱你等于爱自己".getBytes("GBK"),"iso-8859-1"))
// System.out.println(myFtp.upload("E:\\yw.flv", "/yw.flv",5))
// System.out.println(myFtp.upload("E:\\爱你等于爱自己.mp4","/爱你等于爱自己.mp4"))
//System.out.println(myFtp.download("/爱你等于爱自己.mp4", "E:\\爱你等于爱自己.mp4"))
myFtp.disconnect()
} catch (IOException e) {
System.out.println("连接FTP出错："+e.getMessage())
}
}
}
问一下，你是想做ftp上传下载么？
首先你需要安装一个ftp服务端程序，启动起来，然后下载一个ftp客户端程序，测试能不能连接，首先这一块儿需要测试通过。
代码ftp上传下载
2.1 上传代码：
import java.io.File
import java.io.FileInputStream
import org.apache.commons.net.ftp.FTPClient
import org.apache.commons.net.ftp.FTPReply
public class test {
private FTPClient ftp
/**
*
* @param path 上传到ftp服务器哪个路径下
* @param addr 地址
* @param port 端口号
* @param username 用户名
* @param password 密码
* @return
* @throws Exception
*/
private boolean connect(String path,String addr,int port,String username,String password) throws Exception {
boolean result = false
ftp = new FTPClient()
int reply
ftp.connect(addr,port)
ftp.login(username,password)
ftp.setFileType(FTPClient.BINARY_FILE_TYPE)
reply = ftp.getReplyCode()
if (!FTPReply.isPositiveCompletion(reply)) {
ftp.disconnect()
return result
}
ftp.changeWorkingDirectory(path)
result = true
return result
}
/**
*
* @param file 上传的文件或文件夹
* @throws Exception
*/
private void upload(File file) throws Exception{
if(file.isDirectory()){
ftp.makeDirectory(file.getName())
ftp.changeWorkingDirectory(file.getName())
String[] files = file.list()
for (int i = 0i <files.lengthi++) {
File file1 = new File(file.getPath()+"\\"+files[i] )
if(file1.isDirectory()){
upload(file1)
ftp.changeToParentDirectory()
}else{
File file2 = new File(file.getPath()+"\\"+files[i])
FileInputStream input = new FileInputStream(file2)
ftp.storeFile(file2.getName(), input)
input.close()
}
}
}else{
File file2 = new File(file.getPath())
FileInputStream input = new FileInputStream(file2)
ftp.storeFile(file2.getName(), input)
input.close()
}
}
public static void main(String[] args) throws Exception{
test t = new test()
t.connect("", "localhost", 21, "yhh", "yhhazr")
File file = new File("e:\\uploadify")
t.upload(file)
}
}
2.2 下载代码
这里没有用到filter，如果用filter就可以过滤想要的文件。
public class Ftp {
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
Ftp ftp = new Ftp()
String hostname = "www.strawberry.com"
Integer port = 21
String username = "username"
String password = "password"
String remote = "/c.txt"
String local = "/home/tin/LeonChen/FTP/"
try {
ftp.connect(hostname, port, username, password)
System.out.println("接收状态："+ftp.download(remote, local))
ftp.disconnect()
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace()
}
}
private FTPClient ftpClient = new FTPClient()
/*
* * 连接到FTP服务器
* * @param hostname 主机名
* * @param port 端口
* * @param username 用户名
* * @param password 密码
* * @return 是否连接成功
* * @throws IOException
*/
private boolean connect(String hostname, int port, String username,
String password) throws IOException {
ftpClient.connect(hostname, port)
ftpClient.setControlEncoding("UTF-8")
if (FTPReply.isPositiveCompletion(ftpClient.getReplyCode())) {
if (ftpClient.login(username, password)) {
return true
}
}
disconnect()
return false
}
/*
* 从FTP服务器上下载文件,支持断点续传，上传百分比汇报
*
* @param remote 远程文件路径
*
* @param local 本地文件路径
*
* @return 上传的状态
*
* @throws IOException
*/
public DownloadStatus download(String remote, String local)
throws IOException {
// 设置被动模式
ftpClient.enterLocalPassiveMode()
// 设置以二进制方式传输
ftpClient.setFileType(FTP.BINARY_FILE_TYPE)
DownloadStatus result
// 检查远程文件是否存在
FTPFile[] files = ftpClient.listFiles(new String(remote
.getBytes("UTF-8"), "iso-8859-1"))
if (files.length != 1) {
System.out.println("远程文件不存在")
return DownloadStatus.Remote_File_Noexist
}
long lRemoteSize = files[0].getSize()
String fildName = files[0].getName()
// 本地存在文件，进行断点下载
File f = new File(local+fildName)
if (f.exists()) {
long localSize = f.length()
if (localSize >= lRemoteSize) {
System.out.println("本地文件大于远程文件，下载中止")
return DownloadStatus.Local_Bigger_Remote
}
// 进行断点续传，并记录状态
FileOutputStream out = new FileOutputStream(f, true)
ftpClient.setRestartOffset(localSize)
InputStream in = ftpClient.retrieveFileStream(new String(remote.getBytes("UTF-8"), "iso-8859-1"))
byte[] bytes = new byte[1024]
long step = lRemoteSize / 100
long process = localSize / step
int c
while ((c = in.read(bytes)) != -1) {
out.write(bytes, 0, c)
localSize += c
long nowProcess = localSize / step
if (nowProcess >process) {
process = nowProcess
if (process % 10 == 0)
System.out.println("下载进度：" + process)
// TODO 更新文件下载进度,值存放在process变量中
}
}
in.close()
out.close()
boolean isDo = ftpClient.completePendingCommand()
if (isDo) {
result = DownloadStatus.Download_From_Break_Success
} else {
result = DownloadStatus.Download_From_Break_Failed
}
} else {
OutputStream out = new FileOutputStream(f)
InputStream in = ftpClient.retrieveFileStream(new String(remote.getBytes("UTF-8"), "iso-8859-1"))
byte[] bytes = new byte[1024]
long step = lRemoteSize / 100
long process = 0
long localSize = 0L
int c
while ((c = in.read(bytes)) != -1) {
out.write(bytes, 0, c)
localSize += c
long nowProcess = localSize / step
if (nowProcess >process) {
process = nowProcess
if (process % 10 == 0)
System.out.println("下载进度：" + process)
// TODO 更新文件下载进度,值存放在process变量中
}
}
in.close()
out.close()
boolean upNewStatus = ftpClient.completePendingCommand()
if (upNewStatus) {
result = DownloadStatus.Download_New_Success
} else {
result = DownloadStatus.Download_New_Failed
}
}
return result
}
private void disconnect() throws IOException {
if (ftpClient.isConnected()) {
ftpClient.disconnect()
}
}
}
您好，要获取FTP文件的当前日期，可以使用Java的FTPClient类。FTPClient类提供了一些方法，可以获取文件的当前日期，包括getModificationTime()、getTimestamp()和getLastModified()。这些方法可以获取文件的最后修改时间，以及文件的最后修改时间，以及文件的最后修改日期。要使用这些方法，首先需要连接到FTP服务器，然后使用FTPClient类的listFiles()方法获取文件列表，然后使用getModificationTime()、getTimestamp()和getLastModified()方法获取文件的最后修改时间，以及文件的最后修改日期。
另外，Java还提供了一个FTPFile类，可以获取文件的最后修改时间，以及文件的最后修改日期。FTPFile类提供了getTimestamp()方法，可以获取文件的最后修改时间，以及文件的最后修改日期。
总之，使用Java的FTPClient类和FTPFile类，可以轻松获取FTP文件的当前日期。
