利用commons-net包实现ftp上传下载例子

雯丽1016

　　
　　下载文件的时候注意一下，第一个参数要用iso-8859_1编码的，否则文件大小等于0！
　　直接贴图代码了：
　　

package ftp2;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.net.SocketException;
import org.apache.commons.io.FileUtils;
import org.apache.commons.io.IOUtils;
import org.apache.commons.net.ftp.FTPClient;
import org.apache.commons.net.ftp.FTPClientConfig;
import org.apache.commons.net.ftp.FTPFile;
import org.apache.commons.net.ftp.FTPReply;
/**
* 使用commons的net包进行ftp链接. 相关包：commons-net-1.4.1.jar ;
* commons-io-1.2.jar;jakarta-oro-2.0.8.jar测试通过.可以列出ftp上的文件
* 通过把ftp服务器上的文件流连接到outSteam及可以把文件下载到本机的目录..限制如果目录为中文则需要处理.最好使用英文文件名
*
*/
public class ListFtpFile {
private FTPClient ftpClient = new FTPClient();
private OutputStream outSteam = null;
/**
* ftp服务器地址
*/
private String hostName = "192.168.0.2";
private int port = 212;
/**
* 登录名
*/
private String userName = "anonymous";//匿名登录
/**
* 登录密码
*/
private String password = "121@hotmail.com";//随便一个地址
/**
* 需要访问的远程目录
*/
private String remoteDir = "/software/dreamweaver/";
/**
* 下载
*/
private void download() {
try {
// 链接到ftp服务器
ftpClient.connect(hostName,port);
System.out.println("连接到ftp服务器：" + hostName + " 成功..开始登录");
// 登录.用户名 密码
boolean b = ftpClient.login(userName, password);
System.out.println("登录成功." + b);
//检测连接是否成功
int reply = ftpClient.getReplyCode();
if(!FTPReply.isPositiveCompletion(reply)) {
ftpClient.disconnect();
System.err.println("FTP server refused connection.");
System.exit(1);
}
ftpClient.setControlEncoding("GBK");
FTPClientConfig conf = new FTPClientConfig(FTPClientConfig.SYST_NT);  
conf.setServerLanguageCode("zh");
FTPFile[] remoteFiles = ftpClient.listFiles(remoteDir);
if (remoteFiles != null) {
for (int i = 0; i < remoteFiles.length; i++) {
String name = remoteFiles.getName();
//下载
File localFile = new File("c:/001/ftp/" + name);
OutputStream is = new FileOutputStream(localFile);
//retrieveFile的第一个参数需要是 ISO-8859-1 编码,并且必须是完整路径！
String fileName = remoteDir + name;
ftpClient.retrieveFile(new String(fileName.getBytes("GBK"),"ISO-8859-1"), is);
is.close();
//打印
long length = remoteFiles.getSize();
String readableLength = FileUtils.byteCountToDisplaySize(length);
System.out.println(name + ":\t"+remoteFiles.isFile()+"\t" + readableLength);
}
}

ftpClient.logout();
} catch (Exception e) {
e.printStackTrace();
} finally {
IOUtils.closeQuietly(outSteam);
try {
ftpClient.disconnect();
} catch (IOException ioe) {
ioe.printStackTrace();
}
}
}
/**
* 上传
* */
public void upload(){
String srcUrl = "C:/001/菜单权限设计.doc";
String targetFileName = "菜单权限设计.doc";
try {
ftpClient.connect(hostName,port);
boolean b = ftpClient.login(userName, password);
// 检测连接是否成功
int reply = ftpClient.getReplyCode();
if (!FTPReply.isPositiveCompletion(reply)) {
ftpClient.disconnect();
System.err.println("FTP server refused connection.");
System.exit(1);
}
ftpClient.setControlEncoding("GBK");
FTPClientConfig conf = new FTPClientConfig(FTPClientConfig.SYST_NT);  
conf.setServerLanguageCode("zh");
File srcFile = new File(srcUrl);
FileInputStream fis = null;
fis = new FileInputStream(srcFile);
// 设置上传目录
ftpClient.changeWorkingDirectory(remoteDir);
ftpClient.setBufferSize(1024);
ftpClient.setControlEncoding("GBK");
// 设置文件类型（二进制）
ftpClient.setFileType(FTPClient.BINARY_FILE_TYPE);
// 上传
b = ftpClient.storeFile(targetFileName, fis);
IOUtils.closeQuietly(fis);
/*boolean bool = ftpClient.changeWorkingDirectory("/NC");
System.out.println("changeWorkingDirectory="+bool);
bool = ftpClient.makeDirectory("/NC");
System.out.println("makeDirectory="+bool);*/
ftpClient.logout();
} catch (SocketException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}finally{
try {
ftpClient.disconnect();
} catch (IOException e) {
e.printStackTrace();
}
}
}
/**
* 测试
* */
public static void main(String[] args) {
ListFtpFile listFtpfiles = new ListFtpFile();
listFtpfiles.download();
listFtpfiles.upload();
}
}