JAVA-JDK 1.7连接FTP服务器

任2519

　　FTPUtil.java

package com.ftp;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.InetSocketAddress;
import java.net.SocketAddress;
import sun.net.ftp.FtpClient;
import sun.net.ftp.FtpProtocolException;
public class FTPUtil {
/**
* 连接ftp服务器 JDK 1.7
* @param url
* @param port
* @param username
* @param password
* @return FtpClient
* @throws FtpProtocolException
* @throws IOException
*/
public static FtpClient connectFTP(String url,int port,String username,String password) {
//创建ftp
FtpClient ftp = null;
try {
//创建地址
SocketAddress addr = new InetSocketAddress(url,port);
//连接
ftp = FtpClient.create();
ftp.connect(addr);
//登陆
ftp.login(username,password.toCharArray());
ftp.setBinaryType();
System.out.println(ftp.getWelcomeMsg());
} catch (FtpProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return ftp;
}
/**切换目录
* @param ftp
* @param path
*/
public static void changeDirectory(FtpClient ftp,String path) {
try {
ftp.changeDirectory(path);
System.out.println(ftp.getWorkingDirectory());
} catch (FtpProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
/**
* 关闭ftp
* @param ftp
*/
public static void disconnectFTP(FtpClient ftp){
try {
ftp.close();
System.out.println("disconnect success!!");
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
/**
* 上传文件
* @param localFile
* @param ftpFile
* @param ftp
*/
public static void upload(String localFile,String ftpFile,FtpClient ftp){
OutputStream os = null;
FileInputStream fis = null;
try {
//将ftp文件加入输出流中。输出到ftp上
os = ftp.putFileStream(ftpFile);
File file = new File(localFile);
//创建一个缓冲区
fis = new FileInputStream(file);
byte[] bytes = new byte[1024];
int c;
while((c = fis.read(bytes))!=-1){
os.write(bytes,0,c);
}
System.out.println("upload success!!");
} catch (FtpProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}finally{
try {
if(os!=null)
os.close();
if(fis!=null)
fis.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}

}
/**
* 文件下载
* @param localFile
* @param ftpFile
* @param ftp
*/
public static void download(String localFile,String ftpFile,FtpClient ftp){
InputStream is = null;
FileOutputStream fos = null;
try {
//获取ftp上的文件
is = ftp.getFileStream(ftpFile);
File file = new File(localFile);
byte[] bytes = new byte[1024];
int i;
fos = new FileOutputStream(file);
while((i = is.read(bytes))!=-1){
fos.write(bytes, 0, i);
}
System.out.println("download success!!");
} catch (FtpProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}finally{
try {
if(fos!=null)
fos.close();
if(is!=null){
is.close();
}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}
　　Test.java

package test;
import java.net.InetAddress;
import java.net.UnknownHostException;
import sun.net.ftp.FtpClient;
import com.ftp.FTPUtil;
public class Test {
public static void main(String[] args) {
try {
InetAddress addr =  InetAddress.getLocalHost();
System.out.println(addr.getHostAddress());
} catch (UnknownHostException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
String ip = "10.10.10.10";
int port = 21;
String username = "root";
String password = "root";
String path = "/home";
//连接ftp
FtpClient ftp = FTPUtil.connectFTP(ip, port, username, password);
System.out.println(ftp.getWelcomeMsg());
//切换目录
FTPUtil.changeDirectory(ftp, path);
System.out.println("-----上传----");
FTPUtil.upload("D:\\aaa.txt", "/home/aaa.txt", ftp);
System.out.println("-----下载----");
FTPUtil.download("D:\\aaa.txt", "/home/aaa.txt", ftp);
}
}