FTP远程上传下载文件

77321uoh7y

　　最近工作中用到FTP知识，感觉比较好用，代码贴在下面

/**
* 这个是真正执行FTPUtils任务的
*
* @author Administrator
*
*/
public class FtpUtils {
private String ip = "";
private String username = "";
private String password = "";
private int port = -1;
private String path = "";
FtpClient ftpClient = null;
OutputStream os = null;
FileInputStream is = null;
public FtpUtils(String serverIP, String username, String password) {
this.ip = serverIP;
this.username = username;
this.password = password;
}
public FtpUtils(String serverIP, int port, String username, String password) {
this.ip = serverIP;
this.username = username;
this.password = password;
this.port = port;
}
/**
* 连接ftp服务器
*
* @throws IOException
*/
public boolean connectServer() {
ftpClient = new FtpClient();
try {
if (this.port != -1) {
ftpClient.openServer(this.ip, this.port);
} else {
ftpClient.openServer(this.ip);
}
ftpClient.login(this.username, this.password);
if (this.path.length() != 0) {
ftpClient.cd(this.path);// path是ftp服务下主目录的子目录
}
ftpClient.binary();// 用2进制上传、下载
System.out.println("已登录到\"" + ftpClient.pwd() + "\"目录");
return true;
} catch (IOException e) {
e.printStackTrace();
return false;
}
}
/**
* 断开与ftp服务器连接
*
* @throws IOException
*/
public boolean closeServer() {
try {
if (is != null) {
is.close();
}
if (os != null) {
os.close();
}
if (ftpClient != null) {
ftpClient.closeServer();
}
System.out.println("已从服务器断开");
return true;
} catch (IOException e) {
e.printStackTrace();
return false;
}
}
/**
* 检查文件夹在当前目录下是否存在
*
* @param dir
* @return
*/
private boolean isDirExist(String dir) {
String pwd = "";
try {
pwd = ftpClient.pwd();
ftpClient.cd(dir);
ftpClient.cd(pwd);
} catch (Exception e) {
return false;
}
return true;
}
/**
* 在当前目录下创建文件夹
*
* @param dir
* @return
* @throws Exception
*/
private boolean createDir(String dir) {
try {
ftpClient.ascii();
StringTokenizer s = new StringTokenizer(dir, "/"); // sign
s.countTokens();
String pathName = ftpClient.pwd();
while (s.hasMoreElements()) {
pathName = pathName + "/" + (String) s.nextElement();
try {
ftpClient.sendServer("MKD " + pathName + "\r\n");
} catch (Exception e) {
e = null;
return false;
}
ftpClient.readServerResponse();
}
ftpClient.binary();
return true;
} catch (IOException e1) {
e1.printStackTrace();
return false;
}
}
/**
* ftp上传 如果服务器段已存在名为filename的文件夹，该文件夹中与要上传的文件夹中同名的文件将被替换
*
* @param filename
*            要上传的文件（或文件夹）名
* @return
* @throws Exception
*/
public boolean upload(String filename) {
String newname = "";
if (filename.indexOf("/") > -1) {
newname = filename.substring(filename.lastIndexOf("/") + 1);
} else {
newname = filename;
}
return upload(filename, newname);
}
/**
* ftp上传 如果服务器段已存在名为newName的文件夹，该文件夹中与要上传的文件夹中同名的文件将被替换
*
* @param fileName
*            要上传的文件（或文件夹）名
* @param newName
*            服务器段要生成的文件（或文件夹）名
* @return
*/
public boolean upload(String fileName, String newName) {
try {
String savefilename = new String(fileName.getBytes("ISO-8859-1"),
"GBK");
File file_in = new File(savefilename);// 打开本地待长传的文件
if (!file_in.exists()) {
throw new Exception("此文件或文件夹[" + file_in.getName() + "]有误或不存在!");
}
if (file_in.isDirectory()) {
upload(file_in.getPath(), newName, ftpClient.pwd());
} else {
uploadFile(file_in.getPath(), newName);
}
if (is != null) {
is.close();
}
if (os != null) {
os.close();
}
return true;
} catch (Exception e) {
e.printStackTrace();
System.err.println("Exception e in Ftp upload(): " + e.toString());
return false;
} finally {
try {
if (is != null) {
is.close();
}
if (os != null) {
os.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
/**
* 真正用于上传的方法
*
* @param fileName
* @param newName
* @param path
* @throws Exception
*/
private void upload(String fileName, String newName, String path)
throws Exception {
String savefilename = new String(fileName.getBytes(), "gbk");
File file_in = new File(savefilename);// 打开本地待长传的文件
if (!file_in.exists()) {
throw new Exception("此文件或文件夹[" + file_in.getName() + "]有误或不存在!");
}
if (file_in.isDirectory()) {
if (!isDirExist(newName)) {
createDir(newName);
}
ftpClient.cd(newName);
File sourceFile[] = file_in.listFiles();
for (int i = 0; i < sourceFile.length; i++) {
if (!sourceFile.exists()) {
continue;
}
if (sourceFile.isDirectory()) {
this.upload(sourceFile.getPath(), sourceFile
.getName(), path + "/" + newName);
} else {
this.uploadFile(sourceFile.getPath(), sourceFile
.getName());
}
}
} else {
uploadFile(file_in.getPath(), newName);
}
ftpClient.cd(path);
}
/**
* upload 上传文件
*
* @param filename
*            要上传的文件名
* @param newname
*            上传后的新文件名
* @return -1 文件不存在 >=0 成功上传，返回文件的大小
* @throws Exception
*/
public long uploadFile(String filename, String newname) throws Exception {
long result = 0;
TelnetOutputStream os = null;
FileInputStream is = null;
try {
java.io.File file_in = new java.io.File(filename);
if (!file_in.exists())
return -1;
os = ftpClient.put(newname);
result = file_in.length();
is = new FileInputStream(file_in);
byte[] bytes = new byte[1024];
int c;
while ((c = is.read(bytes)) != -1) {
os.write(bytes, 0, c);
}
} finally {
if (is != null) {
is.close();
}
if (os != null) {
os.close();
}
}
return result;
}
/**
* 从ftp下载文件到本地
*
* @param filename
*            服务器上的文件名
* @param newfilename
*            本地生成的文件名
* @return
* @throws Exception
*/
public long downloadFile(String filename, String newfilename) {
long result = 0;
TelnetInputStream is = null;
FileOutputStream os = null;
try {
is = ftpClient.get(filename);
java.io.File outfile = new java.io.File(newfilename);
os = new FileOutputStream(outfile);
byte[] bytes = new byte[1024];
int c;
while ((c = is.read(bytes)) != -1) {
os.write(bytes, 0, c);
result = result + c;
}
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
if (is != null) {
is.close();
}
if (os != null) {
os.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
return result;
}
/**
* 取得相对于当前连接目录的某个目录下所有文件列表
*
* @param path
* @return
*/
public List getFileList(String path) {
List list = new ArrayList();
DataInputStream dis;
try {
dis = new DataInputStream(ftpClient.nameList(this.path + path));
String filename = "";
while ((filename = dis.readLine()) != null) {
list.add(filename);
}
} catch (IOException e) {
e.printStackTrace();
}
return list;
}
public static void main(String[] args) {
FtpUtils ftp = new FtpUtils("144.64.131.304", 21, "user", "user");
ftp.connectServer();
// 只能上传整个目录中的东西到虚拟目录下的目录
try {
// ftp.upload("e:/aa.txt", "ftptargetdir/aa.txt","test");
// //上传单个文件到单个文件
ftp.upload("d:/crmtest", "ftptargetdir", ".");// 上传整个文件夹的内容,中文的好像都传不了，DOS命令下可以
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
// System.out.println(result?"上传成功！":"上传失败！");
//
// List<File> list = ftp.getFileList("vir_dir");
//
// for(int i=0;i<list.size();i++){
//
// System.out.println(list.get(i).getName());
//
// }
ftp.closeServer();
/**
* FTP远程命令列表
*
* USER PORT RETR ALLO DELE SITE XMKD CDUP FEAT
*
* PASS PASV STOR REST CWD STAT RMD XCUP OPTS
*
* ACCT TYPE APPE RNFR XCWD HELP XRMD STOU AUTH
*
* REIN STRU SMNT RNTO LIST NOOP PWD SIZE PBSZ
*
* QUIT MODE SYST ABOR NLST MKD XPWD MDTM PROT
*
* 在服务器上执行命令,如果用sendServer来执行远程命令(不能执行本地FTP命令)的话，所有FTP命令都要加上\r\n
*
* ftpclient.sendServer("XMKD /test/bb\r\n"); //执行服务器上的FTP命令
*
* ftpclient.readServerResponse一定要在sendServer后调用
*
* nameList("/test")获取指目录下的文件列表
*
* XMKD建立目录，当目录存在的情况下再次创建目录时报错
*
* XRMD删除目录
*
* DELE删除文件
*/
}
}