一个JAVA实现FTP功能的代码，包括了服务器的设置模块，并包括有上传文件至FTP的通用方法、下载文件的通用方法以及删除文件、在ftp服务器上穿件文件夹、检测文件夹是否存在等，里面的有些代码对编写JAVA文件上传或许有参考价值,直接把代码贴出来了,注释写的很详细,大家可以参考参考.
1.FtpUtil
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.RandomAccessFile;
import sun.net.TelnetOutputStream;
import sun.net.ftp.FtpClient;
import org.apache.log4j.Logger;
public class FtpUtil {
// 日志
private static final Logger log = Logger.getLogger(FtpUtil.class);
private FtpBean ftpBean = null;
private FtpClient client = null;
public FtpUtil(FtpBean ftpBean) {
super();
this.ftpBean = ftpBean;
}
/**
* 连接ftp服务
*
* @return
* @throws IOException
*/
public FtpClient openFtp() throws IOException {
log.debug("正在连接" + ftpBean.getHostName() + "，请等待.....");
if(ftpBean==null||ftpBean.getHostName()==null||"".equals(ftpBean.getHostName()))
throw new IOException("Ftp连接地址为空！！！");
client = new FtpClient(ftpBean.getHostName(), ftpBean.getDefaultport());
client.login(ftpBean.getUserName(), ftpBean.getPassword());
client.binary();
log.debug("连接主机:" + ftpBean.getHostName() + "成功!");
return client;
}
/**
*
* <p>上传文件或目录: </p>
*
* @param sourceSrc
* 上传的文件或目录
* @param targetSrc
* 上传目标目录
* @author humf
* @return void
* @version 1.0
*/
public void uploadFile(String sourceSrc, String targetSrc,String rootSrc) throws Exception {
log.debug("sourceSrc:" + sourceSrc + "<==>targetSrc:" + targetSrc+"<-->"+rootSrc);
client.cd(rootSrc);
String root = "";
File file = new File(sourceSrc);
if (!file.exists())
throw new FileNotFoundException();
if (file.isDirectory()) {
createDir(targetSrc, false);
File[] files = file.listFiles();
for (File fs : files) {
if (!fs.isDirectory()) {
uplocalFile(fs);
}
//log.debug("目录下所有文件名称【" + fs.getAbsolutePath() + "】");
}
} else {
log.debug("----===="+file.getParent());
createDir(targetSrc.substring(0,targetSrc.lastIndexOf("/")), false);
uplocalFile(file);
}
}
/**
*
* <p> 上传单个文件:</p>
*
* @param sourceSrc
* 原文件
* @param
* @author
* @return void
* @version 1.0
*/
private void uplocalFile(File file) throws FileNotFoundException, IOException {
//log.debug("上传的文件【" + file.getAbsolutePath() + "】");
RandomAccessFile source = new RandomAccessFile(file, "r");
source.seek(0);
DataOutputStream os = null;
TelnetOutputStream target = null;
int ch;
target = client.put(file.getName());
os = new DataOutputStream(target);
byte[] buf = new byte[10240];
while ((ch = source.read(buf)) != -1) {
os.write(buf,0,ch);
}
/* while (source.getFilePointer() < source.length()) {
ch = source.read();
os.write(ch);
}*/
os.close();
target.close();
source.close();
}
/**
* 关闭ftp服务
*
* @throws IOException
*/
public void closeFtp() throws IOException {
if (null != client) {
log.debug("与主机" + client.getUseFtpProxy() + "连接已断开!");
client.closeServer();
}
}
/**
* 建立FTP文件夹
*
* @param d
* @param isDeep
* @return
*/
private boolean createDir(String d, boolean isDeep) {
boolean success = true;
if (isDeep) {
try {
client.cd(d);
//log.debug("目录【" + d + "】存在！");
} catch (IOException e) {
//log.debug("目录【" + d + "】不存在，开始创建...");
client.sendServer("mkd " + d + "\r\n");
try {
client.cd(d);
client.binary();
client.readServerResponse();
} catch (IOException e1) {
e.printStackTrace();
success = false;
}
}
return success;
} else {
//log.debug("开始创建文件夹【" + d + "】...");
if (null == d && "".equals(d)) {
success = false;
}
String[] dArray = d.split("/");
for (int i = 0; i < dArray.length; i++) {
if (null == dArray[i] || "".equals(dArray[i])) {
continue;
}
//log.debug("验证子文件夹【" + dArray[i] + "】是否存在...");
StringBuilder dir = new StringBuilder();
dir.append(dArray[i]);
if (!createDir(dArray[i].toString(), true)) {
success = false;
break;
}
}
}
return success;
}
}
2.FtpBean
public class FtpBean {
// ftp服务器地址
private String hostName;
//ftp服务器默认端口
public static int defaultport = 21;
// 登录名
private String userName;
// 登录密码
private String password;
// 需要访问的远程目录
private String uploadDir="";
private boolean isChTimeZone;
public String getHostName() {
return hostName;
}
public void setHostName(String hostName) {
this.hostName = hostName;
}
public static int getDefaultport() {
return defaultport;
}
public static void setDefaultport(int defaultport) {
FtpBean.defaultport = defaultport;
}
public String getUserName() {
return userName;
}
public void setUserName(String userName) {
this.userName = userName;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public String getUploadDir() {
return uploadDir;
}
public void setUploadDir(String uploadDir) {
this.uploadDir = uploadDir;
}
public boolean isChTimeZone() {
return isChTimeZone;
}
public void setChTimeZone(boolean isChTimeZone) {
this.isChTimeZone = isChTimeZone;
}
public FtpBean(String hostName, String userName, String password) {
super();
this.hostName = hostName;
this.userName = userName;
this.password = password;
}
public FtpBean() {
super();
}
}
3.FTPclient
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.RandomAccessFile;
import org.apache.log4j.Logger;
import sun.net.TelnetOutputStream;
import sun.net.TelnetInputStream;
import sun.net.ftp.FtpClient;
public class FTPclient {
private String localfilename;
private String localSource;//ftp下载后存放的本地目录
private String remotefilename;
/**
* 日志
*/
private static final Logger log = Logger.getLogger( FTPclient.class.getName() );
FtpClient ftpClient;
// server：服务器名字
// user：用户名
// password：密码
// path：服务器上的路径
public void connectServer(String ip, int port,String user
, String password,String path) {
try {
ftpClient = new FtpClient();
ftpClient.openServer(ip,port);
ftpClient.login(user, password);
log.info("ftpPaht="+ip+":" + "port:" + port +"login success!");
if (path.length() != 0) ftpClient.cd(path);
ftpClient.binary();
} catch (IOException ex) {
log.info("ftpPaht="+ip+":" + "port:" + port +"not login");
log.info(ex);
}
}
public void closeConnect() {
try {
ftpClient.closeServer();
log.info("disconnect success");
} catch (IOException ex) {
log.info("not disconnect");
log.info(ex);
}
}
public void upload() {
// this.localfilename = "D://test2//test.txt";
// this.remotefilename = "test.txt";
try {
TelnetOutputStream os = ftpClient.put(this.remotefilename);
java.io.File file_in = new java.io.File(this.localfilename);
FileInputStream is = new FileInputStream(file_in);
byte[] bytes = new byte[1024];
int c;
while ((c = is.read(bytes)) != -1) {
os.write(bytes, 0, c);
}
log.info(localfilename + "upload success");
is.close();
os.close();
} catch (IOException ex) {
log.info(localfilename + "not upload");
log.info(ex);
}
}
public void download() {
try {
TelnetInputStream is = ftpClient.get(this.remotefilename);
java.io.File file_in = new java.io.File(this.localfilename);
FileOutputStream os = new FileOutputStream(file_in);
byte[] bytes = new byte[1024];
int c;
while ((c = is.read(bytes)) != -1) {
// System.out.println((char)is.read());
// System.out.println(file_in);
os.write(bytes, 0, c);
}
log.info(remotefilename + "download success");
os.close();
is.close();
} catch (IOException ex) {
log.info(remotefilename + "not download");
log.info(ex);
}
}
public void download(String remotePath,String remoteFile,String localFile) {
try {
if (remotePath.length() != 0) ftpClient.cd(remotePath);
TelnetInputStream is = ftpClient.get(remoteFile);
java.io.File file_in = new java.io.File(localFile);
FileOutputStream os = new FileOutputStream(file_in);
byte[] bytes = new byte[1024];
int c;
while ((c = is.read(bytes)) != -1) {
// System.out.println((char)is.read());
// System.out.println(file_in);
os.write(bytes, 0, c);
}
log.info(remoteFile + "download success");
os.close();
is.close();
} catch (IOException ex) {
log.info(remoteFile + "not download");
log.info(ex);
}
}
public void download(String remoteFile,String localFile) {
try {
TelnetInputStream is = ftpClient.get(remoteFile);
java.io.File file_in = new java.io.File(localFile);
FileOutputStream os = new FileOutputStream(file_in);
byte[] bytes = new byte[1024];
int c;
while ((c = is.read(bytes)) != -1) {
// System.out.println((char)is.read());
// System.out.println(file_in);
os.write(bytes, 0, c);
}
log.info(remoteFile + "download success");
os.close();
is.close();
} catch (IOException ex) {
log.info(remoteFile + "not download");
log.info(ex);
}
}
public void makeDirectory(String ftpdirectory) throws IOException{
try
{
char ch = ' ';
if (ftpdirectory.length() > 0)
ch = ftpdirectory.charAt(ftpdirectory.length() - 1);
for (; ch == '/' || ch == '\\'; ch = ftpdirectory.charAt(ftpdirectory.length() - 1))
ftpdirectory = ftpdirectory.substring(0, ftpdirectory.length() - 1);
int slashindex = ftpdirectory.indexOf(47);
int backslashindex = ftpdirectory.indexOf(92);
int index = slashindex;
String dirall = ftpdirectory;
if (backslashindex != -1 && (index == -1 || index > backslashindex))
index = backslashindex;
String directory = "";
while (index != -1) {
if (index > 0) {
String dir = dirall.substring(0, index);
directory = directory + "/" + dir;
ftpClient.sendServer("xmkd " + directory + "\r\n");
ftpClient.readServerResponse();
}
dirall = dirall.substring(index + 1);
slashindex = dirall.indexOf(47);
backslashindex = dirall.indexOf(92);
index = slashindex;
if (backslashindex != -1 && (index == -1 || index > backslashindex))
index = backslashindex;
}
ftpClient.sendServer("xmkd " + ftpdirectory + "\r\n");
ftpClient.readServerResponse();
}
catch(Exception e)
{
e.printStackTrace();
}
}
public static void main(String agrs[]) {
String filepath[] = { "/callcenter/index.jsp", "/callcenter/ip.txt",
"/callcenter/mainframe/image/processing_bar_2.gif",
"/callcenter/mainframe/image/logo_01.jpg" };
String localfilepath[] = { "C:\\FTP_Test\\index.jsp",
"C:\\FTP_Test\\ip.txt", "C:\\FTP_Test\\processing_bar_2.gif",
"C:\\FTP_Test\\logo_01.jpg" };
FTPclient fu = new FTPclient();
fu.connectServer("172.16.1.66",22, "web_test", "123456","/callcenter");
for(int i=0;i<filepath.length;i++){
fu.download(filepath[i],localfilepath[i]);
}
// fu.upload();
// fu.download();
fu.closeConnect();
}
public String getLocalfilename() {
return localfilename;
}
public void setLocalfilename(String localfilename) {
this.localfilename = localfilename;
}
public String getRemotefilename() {
return remotefilename;
}
public void setRemotefilename(String remotefilename) {
this.remotefilename = remotefilename;
}
public String getLocalSource() {
return localSource;
}
public void setLocalSource(String localSource) {
this.localSource = localSource;
}
}
