JAVA技术实现上传下载文件到FTP服务器(完整)
FavFTPUtil.Java
package com.favccxx.favsoft.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 org.apache.commons.net.ftp.FTPClient;
import org.apache.commons.net.ftp.FTPFile;
import org.apache.commons.net.ftp.FTPReply;
public class FavFTPUtil {
/**
* 上传文件（可供Action/Controller层使用）
* @param hostname FTP服务器地址
* @param port FTP服务器端口号
* @param username FTP登录账号
* @param password FTP登录密码
* @param pathname FTP服务器保存目录
* @param fileName 上传到FTP服务器后的文件名称
* @param inputStream 输入文件流
* @return
*/
public static boolean uploadFile(String hostname, int port, String username, String password, String pathname, String fileName, InputStream inputStream){
boolean flag = false;
FTPClient ftpClient = new FTPClient();
ftpClient.setControlEncoding("UTF-8");
try {
//连接FTP服务器
ftpClient.connect(hostname, port);
//登录FTP服务器
ftpClient.login(username, password);
//是否成功登录FTP服务器
int replyCode = ftpClient.getReplyCode();
if(!FTPReply.isPositiveCompletion(replyCode)){
return flag;
}
ftpClient.setFileType(FTPClient.BINARY_FILE_TYPE);
ftpClient.makeDirectory(pathname);
ftpClient.changeWorkingDirectory(pathname);
ftpClient.storeFile(fileName, inputStream);
inputStream.close();
ftpClient.logout();
flag = true;
} catch (Exception e) {
e.printStackTrace();
} finally{
if(ftpClient.isConnected()){
try {
ftpClient.disconnect();
} catch (IOException e) {
e.printStackTrace();
}
}
}
return flag;
}
/**
* 上传文件（可对文件进行重命名）
* @param hostname FTP服务器地址
* @param port FTP服务器端口号
* @param username FTP登录账号
* @param password FTP登录密码
* @param pathname FTP服务器保存目录
* @param filename 上传到FTP服务器后的文件名称
* @param originfilename 待上传文件的名称（绝对地址）
* @return
*/
public static boolean uploadFileFromProduction(String hostname, int port, String username, String password, String pathname, String filename, String originfilename){
boolean flag = false;
try {
InputStream inputStream = new FileInputStream(new File(originfilename));
flag = uploadFile(hostname, port, username, password, pathname, filename, inputStream);
} catch (Exception e) {
e.printStackTrace();
}
return flag;
}
/**
* 上传文件（不可以进行文件的重命名操作）
* @param hostname FTP服务器地址
* @param port FTP服务器端口号
* @param username FTP登录账号
* @param password FTP登录密码
* @param pathname FTP服务器保存目录
* @param originfilename 待上传文件的名称（绝对地址）
* @return
*/
public static boolean uploadFileFromProduction(String hostname, int port, String username, String password, String pathname, String originfilename){
boolean flag = false;
try {
String fileName = new File(originfilename).getName();
InputStream inputStream = new FileInputStream(new File(originfilename));
flag = uploadFile(hostname, port, username, password, pathname, fileName, inputStream);
} catch (Exception e) {
e.printStackTrace();
}
return flag;
}
/**
* 删除文件
* @param hostname FTP服务器地址
* @param port FTP服务器端口号
* @param username FTP登录账号
* @param password FTP登录密码
* @param pathname FTP服务器保存目录
* @param filename 要删除的文件名称
* @return
*/
public static boolean deleteFile(String hostname, int port, String username, String password, String pathname, String filename){
boolean flag = false;
FTPClient ftpClient = new FTPClient();
try {
//连接FTP服务器
ftpClient.connect(hostname, port);
//登录FTP服务器
ftpClient.login(username, password);
//验证FTP服务器是否登录成功
int replyCode = ftpClient.getReplyCode();
if(!FTPReply.isPositiveCompletion(replyCode)){
return flag;
}
//切换FTP目录
ftpClient.changeWorkingDirectory(pathname);
ftpClient.dele(filename);
ftpClient.logout();
flag = true;
} catch (Exception e) {
e.printStackTrace();
} finally{
if(ftpClient.isConnected()){
try {
ftpClient.logout();
} catch (IOException e) {
}
}
}
return flag;
}
/**
* 下载文件
* @param hostname FTP服务器地址
* @param port FTP服务器端口号
* @param username FTP登录账号
* @param password FTP登录密码
* @param pathname FTP服务器文件目录
* @param filename 文件名称
* @param localpath 下载后的文件路径
* @return
*/
public static boolean downloadFile(String hostname, int port, String username, String password, String pathname, String filename, String localpath){
boolean flag = false;
FTPClient ftpClient = new FTPClient();
try {
//连接FTP服务器
ftpClient.connect(hostname, port);
//登录FTP服务器
ftpClient.login(username, password);
//验证FTP服务器是否登录成功
int replyCode = ftpClient.getReplyCode();
if(!FTPReply.isPositiveCompletion(replyCode)){
return flag;
}
//切换FTP目录
ftpClient.changeWorkingDirectory(pathname);
FTPFile[] ftpFiles = ftpClient.listFiles();
for(FTPFile file : ftpFiles){
if(filename.equalsIgnoreCase(file.getName())){
File localFile = new File(localpath + "/" + file.getName());
OutputStream os = new FileOutputStream(localFile);
ftpClient.retrieveFile(file.getName(), os);
os.close();
}
}
ftpClient.logout();
flag = true;
} catch (Exception e) {
e.printStackTrace();
} finally{
if(ftpClient.isConnected()){
try {
ftpClient.logout();
} catch (IOException e) {
}
}
}
return flag;
}
}
FavFTPUtilTest.java
package com.favccxx.favsoft.util;
import junit.framework.TestCase;
public class FavFTPTest extends TestCase {
public void testFavFTPUtil(){
String hostname = "127.0.0.1";
int port = 21;
String username = "business";
String password = "business";
String pathname = "business/ebook";
String filename = "big.rar";
String originfilename = "C:\\Users\\Downloads\\Downloads.rar";
FavFTPUtil.uploadFileFromProduction(hostname, port, username, password, pathname, filename, originfilename);
// String localpath = "D:/";
// FavFTPUtil.downloadFile(hostname, port, username, password, pathname, filename, localpath);
}
}