关于使用java通过 FTP 上传文件，总结

82c7q4264i

1、需要引入包
   commons-net-ftp-2.0.jar
2、部分代码如下：

import org.apache.commons.io.IOUtils;
import org.apache.commons.net.ftp.FTPClient;
import sun.net.ftp.FtpClient;
import sun.net.ftp.FtpLoginException;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.FileOutputStream;
import java.util.ResourceBundle;

/**
*
* @author 赵永恩
*
*/
public class FtpFile {
public static String FtpIp = "192.168.1.100";
public static int port = 21;
public static String FtpUser = "admin";
public static String FtpPwd = "password";
public static String Ftppath = "/FTP_file/VID/";
/**
* 测试方法
* 上边的信息，可以写在配置文件中，通过读取配置文件来获取
*
*  读取配置文件方法如下：
*  ResourceBundle bundle = ResourceBundle.getBundle("FilePathConfig");//FilePathConfig.properties配置文件的获取路径
*String FtpIp = bundle.getString("FtpIp");
*  String port = bundle.getString("port");
*
* @param args
*/
public static void main(String[] args) {
String filename = "zykgl_yong.dmp";
String localpath = "D:\\zykgl.dmp";
testUpload(localpath,Ftppath,filename);
testDownload(localpath,Ftppath,filename);
fileNames();
}
/**
*
* 连接判断的方法
*
* @param RWFileDir
* @param hostname
* @param port
* @param uid
* @param pwd
* @return
*/
public static String connect(String RWFileDir,String hostname,int port,String uid,String pwd) {
String a="fail";
FtpClient aftp;
System.out.println("正在连接"+hostname+"，请等待....");
try{
aftp = new FtpClient(hostname,port);
aftp.login(uid,pwd);
aftp.binary();
a = "连接主机:"+hostname+"成功!";
a="connectSuccess";
} catch(FtpLoginException e){
a="登陆主机:"+hostname+"失败!请检查用户名或密码是否正确："+e;
} catch (IOException e){
a="连接主机:"+hostname+"失败!请检查端口是否正确："+e;
}catch(SecurityException e){
a="无权限与主机:"+hostname+"连接!请检查是否有访问权限："+e;
}
return a;
}
/**
* FTP上传单个文件测试
*/
public static void testUpload(String localpath,String Ftppath,String filename) {
FTPClient ftpClient = new FTPClient();
FileInputStream fis = null;
try {
ftpClient.connect(FtpIp,port);
ftpClient.login(FtpUser, FtpPwd);
File srcFile = new File(localpath);
fis = new FileInputStream(srcFile);
//设置上传目录
ftpClient.changeWorkingDirectory(Ftppath);
ftpClient.setBufferSize(1024*1024);
ftpClient.setControlEncoding("utf-8");
//设置文件类型（二进制）
ftpClient.setFileType(FTPClient.BINARY_FILE_TYPE);
ftpClient.storeFile(filename, fis);
// 关闭输入流
fis.close();
// 退出ftp
ftpClient.logout();
System.out.println("====上传成功====");
} catch (IOException e) {
e.printStackTrace();
throw new RuntimeException("FTP客户端出错！", e);
} finally {
IOUtils.closeQuietly(fis);
try {
ftpClient.disconnect();
} catch (IOException e) {
e.printStackTrace();
throw new RuntimeException("关闭FTP连接发生异常！", e);
}
}
}

/**
* FTP下载单个文件测试
*/
public static void testDownload(String localpath,String Ftppath,String filename) {
FTPClient ftpClient = new FTPClient();
FileOutputStream fos = null;
try {
ftpClient.connect(FtpIp,port);
ftpClient.login(FtpUser, FtpPwd);
String remoteFileName = Ftppath+filename;
fos = new FileOutputStream(localpath);
ftpClient.setBufferSize(1024);
//设置文件类型（二进制）
ftpClient.setFileType(FTPClient.BINARY_FILE_TYPE);
ftpClient.retrieveFile(remoteFileName, fos);
fos.close();
//退出ftp
ftpClient.logout();
System.out.println("====下载成功====");
} catch (IOException e) {
e.printStackTrace();
throw new RuntimeException("FTP客户端出错！", e);
} finally {
IOUtils.closeQuietly(fos);
try {
ftpClient.disconnect();
} catch (IOException e) {
e.printStackTrace();
throw new RuntimeException("关闭FTP连接发生异常！", e);
}
}
}
/**
* 读取目录下所有文件并下载
*/
public static void fileNames(){
try {
FTPClient ftpclient = new FTPClient();
ftpclient.connect(FtpIp);
ftpclient.login(FtpUser, FtpPwd);
String[] nameList = ftpclient.listNames();
for(int i = 0 ; i < nameList.length ; i++){
String filename = new String(nameList.getBytes("iso-8859-1"));//文件名中文转换iso-8859-1,utf-8
System.out.println(filename+nameList);
String localpath = "F:\\"+filename;//下载后重建文件名
FileOutputStream fos = null;
String remoteFileName = "/"+nameList; //服务器上文件名
if (1>0) {
fos = new FileOutputStream(localpath);
ftpclient.setBufferSize(204800);
//设置文件类型（二进制）
ftpclient.setFileType(FTPClient.BINARY_FILE_TYPE);
ftpclient.retrieveFile(remoteFileName, fos);
fos.close();
ftpclient.logout();
}
}
}catch(Exception e){
e.printStackTrace();
}
}
}


配置文件如下:

FtpIp=192.168.1.100
ftp_port=21
FtpUser=admin
FtpPwd=password
Ftppath=/FTP_file/VID/