java实现ftp上传下载(jdk1.7以上)
java实现ftp上传下载(jdk1.7以上)
网上有很多关于java实现ftp的上传与下载，但都是jdk1.7以下的，最近在做java实现ftp文件上传与下在，搜到的代码不是jdk1.7一下的，就是apache的。将我测试通过的代码与大家共享。
完整代码，复制可用
FTP实现代码：
package com.pifeng.util;
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;
/**
*
* @author 皮锋 java自带的API对FTP的操作
*
*/
public class FtpUtil {
// FTP客户端
private FtpClient ftpClient;
/**
* 服务器连接
* @param ip 服务器IP
* @param port 服务器端口
* @param user 用户名
* @param password 密码
* @param path 服务器路径
*/
public void connectServer(String ip, int port, String user,String password, String path) {
try {
ftpClient = FtpClient.create();
try {
SocketAddress addr = new InetSocketAddress(ip, port);
this.ftpClient.connect(addr);
this.ftpClient.login(user, password.toCharArray());
System.out.println("login success!");
if (path.length() != 0) {
// 把远程系统上的目录切换到参数path所指定的目录
this.ftpClient.changeDirectory(path);
}
} catch (FtpProtocolException e) {
e.printStackTrace();
}
} catch (IOException ex) {
ex.printStackTrace();
throw new RuntimeException(ex);
}
}
/**
* 上传文件
* @param localFile 本地文件
* @param remoteFile 远程文件
*/
public void upload(String localFile, String remoteFile) {
//this.localFilename = localFile;
//this.remoteFilename = remoteFile;
OutputStream os = null;
FileInputStream is = null;
try {
try {
// 将远程文件加入输出流中
os = this.ftpClient.putFileStream(remoteFile);
} catch (FtpProtocolException e) {
e.printStackTrace();
}
// 获取本地文件的输入流
File file_in = new File(localFile);
is = new FileInputStream(file_in);
// 创建一个缓冲区
byte[] bytes = new byte[1024];
int c;
while ((c = is.read(bytes)) != -1) {
os.write(bytes, 0, c);
}
System.out.println("upload success");
} catch (IOException ex) {
System.out.println("not upload");
ex.printStackTrace();
throw new RuntimeException(ex);
} finally {
try {
if (is != null) {
is.close();
}
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
if (os != null) {
os.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
/**
* 文件下载
* @param remoteFile 远程文件
* @param localFile 本地文件
*/
public void download(String remoteFile, String localFile) {
InputStream is = null;
FileOutputStream os = null;
try {
try {
// 获取远程机器上的文件filename，借助TelnetInputStream把该文件传送到本地
is = this.ftpClient.getFileStream(remoteFile);
} catch (FtpProtocolException e) {
e.printStackTrace();
}
File file_in = new File(localFile);
os = new FileOutputStream(file_in);
byte[] bytes = new byte[1024];
int c;
while ((c = is.read(bytes)) != -1) {
os.write(bytes, 0, c);
}
System.out.println("download success");
} catch (IOException ex) {
System.out.println("not download");
ex.printStackTrace();
throw new RuntimeException(ex);
} finally {
try {
if (is != null) {
is.close();
}
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
if (os != null) {
os.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
}}
/**
* 关闭连接
*/
public void closeConnect() {
try {
this.ftpClient.close();
System.out.println("disconnect success");
} catch (IOException ex) {
System.out.println("not disconnect");
ex.printStackTrace();
throw new RuntimeException(ex);
}
}
测试代码：
package test;
import java.text.SimpleDateFormat;
import com.pifeng.util.FtpUtil;
public class TestFtpUtil {
public static void main(String agrs[]) {
FtpUtil fu=new FtpUtil();String filepath[] = { "AWC1002972G020-1.dwg", "AWC1002974G020-1.cgm" };String localfilepath[] = { "D:\\AWC1002972G020-1.dwg","D:\\AWC1002974G020-1.cgm" };/* * 使用默认的端口号、用户名、密码以及根目录连接 FTP 服务器 */
fu.connectServer("127.0.0.1", 21, "pifeng", "19920720", "/");// 下载
for (int i = 0; i < filepath.length; i++) {
fu.download(filepath[i], localfilepath[i]);
}String localfile = "D:\\WorkToolKit\\PDF\\ReadMe.htm";String remotefile = "ReadMe.htm";// 上传
SimpleDateFormat sDateFormat = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");System.out.println(sDateFormat.format(new java.util.Date()));// new Date() 为获取当前系统时间
fu.upload(localfile, remotefile);System.out.println(sDateFormat.format(new java.util.Date()));// new Date() 为获取当前系统时间
fu.closeConnect();
}
}