java通过ftp上传、下载文件，遍历文件目录

import java.io.DataInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import org.apache.catalina.tribes.util.Logs;

import sun.net.TelnetInputStream;
import sun.net.TelnetOutputStream;
import sun.net.ftp.FtpClient;

public class DownFileForFtp {
FtpClient ftpClient;
private String server = "ip";
private int port = 21;
private String userName = "usn";
private String userPassword = "pwd";

/**
* 链接到服务器
*
* @return
*/
public boolean open() {
if (ftpClient != null && ftpClient.serverIsOpen())
return true;
try {
ftpClient = new FtpClient();
ftpClient.openServer(server, port);
ftpClient.login(userName, userPassword);
ftpClient.binary();
return true;
} catch (Exception e) {
e.printStackTrace();
ftpClient = null;
return false;
}
}

public boolean cd(String dir) {
boolean f = false;
try {
ftpClient.cd(dir);
} catch (IOException e) {
//Logs.error(e.toString());
return f;
}
return true;
}

/**
* 上传文件到FTP服务器
*
* @param localPathAndFileName
*            本地文件目录和文件名
* @param ftpFileName
*            上传后的文件名
* @param ftpDirectory
*            FTP目录如:/path1/pathb2/,如果目录不存在回自动创建目录
* @throws Exception
*/
public boolean upload(String localDirectoryAndFileName, String ftpFileName,
String ftpDirectory) throws Exception {
if (!open())
return false;
FileInputStream is = null;
TelnetOutputStream os = null;
try {
char ch = ' ';
if (ftpDirectory.length() > 0)
ch = ftpDirectory.charAt(ftpDirectory.length() - 1);
for (; ch == '/' || ch == '\\'; ch = ftpDirectory
.charAt(ftpDirectory.length() - 1))
ftpDirectory = ftpDirectory.substring(0,
ftpDirectory.length() - 1);

int slashIndex = ftpDirectory.indexOf(47);
int backslashIndex = ftpDirectory.indexOf(92);
int index = slashIndex;
String dirall = ftpDirectory;
if (backslashIndex != -1 && (index == -1 || index > backslashIndex))
index = backslashIndex;
String directory = "";
while (index != -1) {
if (index > 0) {
String dir = dirall.substring(0, index);
directory = directory + "/" + dir;
ftpClient.sendServer("XMKD " + directory + "\r\n");
ftpClient.readServerResponse();
}
dirall = dirall.substring(index + 1);
slashIndex = dirall.indexOf(47);
backslashIndex = dirall.indexOf(92);
index = slashIndex;
if (backslashIndex != -1
&& (index == -1 || index > backslashIndex))
index = backslashIndex;
}
ftpClient.sendServer("XMKD " + ftpDirectory + "\r\n");
ftpClient.readServerResponse();

os = ftpClient.put(ftpDirectory + "/" + ftpFileName);
File file_in = new File(localDirectoryAndFileName);
is = new FileInputStream(file_in);
byte bytes[] = new byte[1024];
int i;
while ((i = is.read(bytes)) != -1)
os.write(bytes, 0, i);
// 清理垃圾

return true;
} catch (Exception e) {
e.printStackTrace();
return false;
} finally {
if (is != null)
is.close();
if (os != null)
os.close();
}
}

/**
* 从FTP服务器上下载文件并返回下载文件长度
*
* @param ftpDirectoryAndFileName
* @param localDirectoryAndFileName
* @return
* @throws Exception
*/
public long download(String ftpDirectoryAndFileName,
String localDirectoryAndFileName) throws Exception {
long result = 0;
if (!open())
return result;
TelnetInputStream is = null;
FileOutputStream os = null;
try {
is = ftpClient.get(ftpDirectoryAndFileName);
java.io.File outfile = new java.io.File(localDirectoryAndFileName);
os = new FileOutputStream(outfile);
byte[] bytes = new byte[1024];
int c;
while ((c = is.read(bytes)) != -1) {
os.write(bytes, 0, c);
result = result + c;
}
} catch (Exception e) {
throw e;
} finally {
if (is != null)
is.close();
if (os != null)
os.close();

}
return result;
}

/**
* 返回FTP目录下的文件列表
*
* @param ftpDirectory
* @return
*/
public List<String> getFileNameList(String ftpDirectory) {
List<String> list = new ArrayList<String>();
if (!open())
return list;
try {
DataInputStream dis = new DataInputStream(
ftpClient.nameList(ftpDirectory));
String filename = "";
while ((filename = dis.readLine()) != null) {
list.add(filename);
System.out.println(filename);
}
} catch (Exception e) {
e.printStackTrace();
}
return list;
}

/**
* 删除FTP上的文件
*
* @param ftpDirAndFileName
*/
public boolean deleteFile(String ftpDirAndFileName) {
if (!open())
return false;
ftpClient.sendServer("DELE " + ftpDirAndFileName + "\r\n");
return true;
}

/**
* 删除FTP目录
*
* @param ftpDirectory
*/
public boolean deleteDirectory(String ftpDirectory) {
if (!open())
return false;
ftpClient.sendServer("XRMD " + ftpDirectory + "\r\n");
return true;
}

/**
* 关闭链接
*/
public void close() {
try {
if (ftpClient != null && ftpClient.serverIsOpen())
ftpClient.closeServer();
} catch (Exception e) {

}
}

public static void main(String []args) throws Exception{
DownFileForFtp df = new DownFileForFtp();
df.getFileNameList("E:\\uploadfiles\\cat");
df.download("E:\\uploadfiles\\cat\\2012-03-29.11.00.00.012.xml", "F:\\temp\\ftpdown\\2012-03-29.11.00.00.012.xml");

}

}