java ftp ftpclient_FTPClient 用法
/**
* connectServer
* 连接ftp服务器
* @throws java.io.IOException
* @param path 文件夹，空代表根目录
*
@param password 密码
* @param user 登陆用户
* @param server 服务器地址
*/
public void connectServer(String server, String user, String password, String path)
throws IOException
{
// server：FTP服务器的IP地址；user:登录FTP服务器的用户名
//
password：登录FTP服务器的用户名的口令；path：FTP服务器上的路径
ftpClient = new FtpClient();
ftpClient.openServer(server);
ftpClient.login(user, password);
//path是ftp服务下主目录的子目录
if (path.length() != 0) ftpClient.cd(path);
//用2进制上传、下载
ftpClient.binary();
}
/**
* upload
* 上传文件
* @throws java.lang.Exception
* @return -1 文件不存在
* -2 文件内容为空
*
>0 成功上传，返回文件的大小
* @param newname 上传后的新文件名
* @param filename
上传的文件
*/
public long upload(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;
if (file_in.length()==0) return -2;
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;
}
/**
* upload
* @throws
java.lang.Exception
* @return
* @param filename
*/
public long upload(String filename)
throws Exception
{
String newname = "";
if
(filename.indexOf("/")>-1)
{
newname = filename.substring(filename.lastIndexOf("/")+1);
}else
{
newname = filename;
}
return
upload(filename,newname);
}
/**
* download
* 从ftp下载文件到本地
* @throws
java.lang.Exception
* @return
* @param newfilename 本地生成的文件名
* @param filename 服务器上的文件名
*/
public long
download(String filename,String newfilename)
throws Exception
{
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 {
if (is != null) {
is.close();
}
if (os != null)
{
os.close();
}
}
return result;
}
/**
* 取得某个目录下的所有文件列表
*
*/
public List getFileList(String path)
{
List list = new ArrayList();
try
{
DataInputStream dis =
new
DataInputStream(ftpClient.nameList(path));
String filename = "";
while((filename=dis.readLine())!=null)
{
list.add(filename);
}
}
catch (Exception e)
{
e.printStackTrace();
}
return list;
}
/**
* closeServer
* 断开与ftp服务器的链接
* @throws java.io.IOException
*/
public void
closeServer()
throws
IOException
{
try
{
if (ftpClient != null)
{
ftpClient.closeServer();
}
} catch (IOException e) {
e.printStackTrace();
}
}
public static
void main(String [] args) throws Exception
{
FtpUtil ftp = new FtpUtil();
try {
//连接ftp服务器
ftp.connectServer("10.163.7.15", "cxl", "1",
"info2");
/** 上传文件到 info2 文件夹下 */
System.out.println("filesize:"+ftp.upload("f:/download/Install.exe")+"字节");
/** 取得info2文件夹下的所有文件列表,并下载到 E盘下 */
List list = ftp.getFileList(".");
for (int i=0;i
{
String filename = (String)list.get(i);
System.out.println(filename);
ftp.download(filename,"E:/"+filename);
}
} catch (Exception e) {
///
}finally
{
ftp.closeServer();
}
}
}