ftp的路径怎么设置

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()

}

}

}

地路径就是在电脑上的位置

远程路径就是服务器上你希望存放文件的位置，通常跟你得网站的虚拟路径一致，即，根目录就是你的网站的根目录。

给你得IP也许就是FTP服务器的地址吧。

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