sun.net.ftp.FtpClient之java编程

import java.io.DataInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.FileInputStream;
import java.util.ArrayList;
import java.util.List;
import sun.net.*;
import sun.net.ftp.FtpClient;

public class FtpUtil {

public FtpClient ftpClient = new FtpClient();

private String ip;      //"192.168.1.13"
private String user; //"Anonymous"
private String psw; //"IEUSER@"
private String path; //    "/"  : 根目录
private String filename;// "c:/xu.txt"  :上传文件（完整名字）

public String getIp() {
return ip;
}

public void setIp(String ip) {
this.ip = ip;
}

public String getUser() {
return user;
}

public void setUser(String user) {
this.user = user;
}

public String getPsw() {
return psw;
}

public void setPsw(String psw) {
this.psw = psw;
}

public String getPath() {
return path;
}

public void setPath(String path) {
this.path = path;
}

public String getFilename() {
return filename;
}

public void setFilename(String filename) {
this.filename = filename;
}

/**
* 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 ip, String user, String psw,
String path) {
// 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();
try {
ftpClient.openServer(ip);
ftpClient.login(user, psw);
// path是ftp服务下主目录的子目录
System.out.println(path);
if (path.length() != 0)
ftpClient.cd(path);
// 用2进制上传、下载
ftpClient.binary();
} catch (IOException e) {
e.printStackTrace();
}
}

/**
* 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<String> getFileList(String path) {
// ftpClient.setControlEncoding("GBK");
List<String> list = new ArrayList<String>();
try {

DataInputStream dis = new DataInputStream(ftpClient.nameList(path));
String filename = "";
while ((filename = dis.readLine()) != null) {
//解决乱码问题
String sfilename = new String(filename.getBytes("ISO-8859-1"),"utf-8");
System.out.println(sfilename);
list.add(sfilename);
}

} 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();
}
}
}