1.根据URL,用户名,密码进行初始化

public class FtpTools {
public static String hostname=null;
public static Integer port=null;
public static String username=null;
public static String password=null;
public static void init(String hostname1,Integer port1,String username1,String password1) {
//ftp服务器地址
hostname =hostname1;
//ftp服务器端口号默认为21
port =port1;// 21 ;
//ftp登录账号
username =username1;//
//ftp登录密码
password =password1;//
}
public static FTPClient ftpClient = null;
/**
* 初始化ftp服务器
*/
public static void initFtpClient() {
ftpClient = new FTPClient();
ftpClient.setControlEncoding("utf-8");
try {
System.out.println("connecting...ftp服务器:"+hostname+":"+port);
ftpClient.connect(hostname, port); //连接ftp服务器
ftpClient.login(username, password); //登录ftp服务器
int replyCode = ftpClient.getReplyCode(); //是否成功登录服务器
if(!FTPReply.isPositiveCompletion(replyCode)){
System.out.println("connect failed...ftp服务器:"+hostname+":"+port);
}
System.out.println("connect successfu...ftp服务器:"+hostname+":"+port);
}catch (MalformedURLException e) {
e.printStackTrace();
}catch (IOException e) {
e.printStackTrace();
}
}

/**
* 上传文件
* @param pathname ftp服务保存地址
* @param fileName 上传到ftp的文件名
* @param originfilename 待上传文件的名称（绝对地址） *
* @return
*/
public static boolean uploadFile( String pathname, String fileName,String originfilename){
boolean flag = false;
InputStream inputStream = null;
try{
System.out.println("开始上传文件");
inputStream = new FileInputStream(new File(originfilename));
initFtpClient();
ftpClient.setFileType(ftpClient.BINARY_FILE_TYPE);
CreateDirecroty(pathname);
ftpClient.makeDirectory(pathname);
ftpClient.changeWorkingDirectory(pathname);
ftpClient.storeFile(fileName, inputStream);
inputStream.close();
ftpClient.logout();
flag = true;
System.out.println("上传文件成功");
}catch (Exception e) {
System.out.println("上传文件失败");
e.printStackTrace();
}finally{
if(ftpClient.isConnected()){
try{
ftpClient.disconnect();
}catch(IOException e){
e.printStackTrace();
}
}
if(null != inputStream){
try {
inputStream.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
return true;
}
/**
* 上传文件
* @param pathname ftp服务保存地址
* @param fileName 上传到ftp的文件名
* @param inputStream 输入文件流
* @return
*/
public boolean uploadFile( String pathname, String fileName,InputStream inputStream){
boolean flag = false;
try{
System.out.println("开始上传文件");
initFtpClient();
ftpClient.setFileType(ftpClient.BINARY_FILE_TYPE);
CreateDirecroty(pathname);
ftpClient.makeDirectory(pathname);
ftpClient.changeWorkingDirectory(pathname);
ftpClient.storeFile(fileName, inputStream);
inputStream.close();
ftpClient.logout();
flag = true;
System.out.println("上传文件成功");
}catch (Exception e) {
System.out.println("上传文件失败");
e.printStackTrace();
}finally{
if(ftpClient.isConnected()){
try{
ftpClient.disconnect();
}catch(IOException e){
e.printStackTrace();
}
}
if(null != inputStream){
try {
inputStream.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
return true;
}
//改变目录路径
public static boolean changeWorkingDirectory(String directory) {
boolean flag = true;
try {
flag = ftpClient.changeWorkingDirectory(directory);
if (flag) {
System.out.println("进入文件夹" + directory + " 成功！");

} else {
System.out.println("进入文件夹" + directory + " 失败！开始创建文件夹");
}
} catch (IOException ioe) {
ioe.printStackTrace();
}
return flag;
}

//创建多层目录文件，如果有ftp服务器已存在该文件，则不创建，如果无，则创建
public static boolean CreateDirecroty(String remote) throws IOException {
boolean success = true;
String directory = remote + "http://www.mamicode.com/";
// 如果远程目录不存在，，则递归创建远程服务器目录
if (!directory.equalsIgnoreCase("http://www.mamicode.com/") && !changeWorkingDirectory(new String(directory))) {
int start = 0;
int end = 0;
if (directory.startsWith("http://www.mamicode.com/")) {
start = 1;
} else {
start = 0;
}
end = directory.indexOf("http://www.mamicode.com/", start);
String path = "";
String paths = "";
while (true) {
String subDirectory = new String(remote.substring(start, end).getBytes("GBK"), "iso-8859-1");
path = path + "http://www.mamicode.com/" + subDirectory;
if (!existFile(path)) {
if (makeDirectory(subDirectory)) {
changeWorkingDirectory(subDirectory);
} else {
System.out.println("创建目录[" + subDirectory + "]失败");
changeWorkingDirectory(subDirectory);
}
} else {
changeWorkingDirectory(subDirectory);
}