FTP

public class FtpUtils {
	
	private FTPClient fc;		//--FTP客户端
	private String ftphost;		//--FTP服务器
	private String ftpuser;		//--用户名
	private String ftppass;		//--密码
	private String ftppath;		//--路径
	private int ftpport;		//--端口
	private int silent;			
	private String pasv;
	private String ftpssl;
	public void setFtpValues(String ftphost, String ftpuser, String ftppass, String ftppath, int ftpport, String ftpssl, int silent, String pasv){
		 this.ftphost = ftphost;
		 this.ftppass = ftppass;
		 this.ftppath = ftppath;
		 this.pasv = pasv;
	     this.ftpport = ftpport;
	     this.ftpuser = ftpuser;
	     this.silent = silent; 
	     this.ftpssl = ftpssl;
	}
	
	/**
	 * 判断FTP服务器是否从在
	 * @return
	 */
	public boolean isEmpty(){
		if(ftphost==null||ftphost.equals("")){
			return true;
		}
		return false;
	}
	
	/**
	 * 连接FTP服务器
	 * @return
	 */
	public String connectToFtpServer(){
        if ((ftphost==null)||(ftphost.equals(""))) return "ftp_service_nameerror";
    	if(fc!=null){ 
	        try {
	    		  fc.disconnect();
	    	 } catch (IOException e) {
	    		  e.printStackTrace();
	    	 }
    	}
    	fc = new FTPClient();
        if(ftpssl.equals("1")){
			SSLServerSocketFactory sslserverfactory = (SSLServerSocketFactory)SSLServerSocketFactory.getDefault();
			SSLSocketFactory sslfactory = (SSLSocketFactory)SSLSocketFactory.getDefault();
			fc.setServerSocketFactory(sslserverfactory);
			fc.setSocketFactory(sslfactory);
        }
        return connectToServer();
    }
	
	/**
	 * 连接FTP服务器
	 * @return
	 */
	private String connectToServer(){
        try{
        	fc.connect(this.ftphost, this.ftpport);
        	if(!fc.login(ftpuser, ftppass)){
        		return "ftp_service_connect";
        	}
        	if(pasv.equals("1")){
        		fc.pasv();
        	}
        	if(silent!=0){
        		fc.setDataTimeout(silent);
        	}
        	if(!fc.changeWorkingDirectory(ftppath)){
        		return "ftp_directory";
        	}
        }catch(FtpLoginException e){
            return "ftp_connect_access";
        }catch(IOException e){
            return "ftp_connect_fail";
        }catch(SecurityException e){
            return "ftp_noaccess";
        }
        return "";
	}
	
	/**
	 * 测试连接
	 * @return
	 */
    public boolean isConnect(){
    	if(fc==null||!fc.isConnected()){
    		return false;
    	}else{
			try {
				String path = fc.printWorkingDirectory();
				if(path==null){
					return false;
				}
			} catch (IOException e) {
				return false;
			}
			return true;
    	}
    }
    
    /**
     * 关闭FTP连接
     */
    public void closeFtpConnect(){
        if (fc!=null){
            try{
                fc.disconnect();
            }catch(Exception e){
            }finally{
                fc = null;
            }
        }
    }
    
    /**
     * 创建目录
     * @param newdir
     * @return
     */
    public  boolean dftp_mkdir(String newdir){
    	boolean makebool;
		try{
			makebool =  fc.makeDirectory(newdir);
			return makebool;
		}catch(Exception e){
			return false;
		}
    }
    
    /**
     * 删除目录
     * @param newdir
     * @return
     */
    public boolean dftp_rmdir(String newdir){
		try{
			return fc.removeDirectory(newdir);
		}catch(Exception e){
			return false;
		}
    }
    
    /**
     * 删除文件
     * @param newdir
     * @return
     */
    public  boolean dftp_delete(String newdir){
		try{
			fc.changeWorkingDirectory(ftppath);
			return fc.deleteFile(newdir);
		}catch(Exception e){
			return false;
		}
    }
    
    /**
     * 修改权限
     * @param newdir
     * @return
     */
    public boolean dftp_site(String newdir){
    	String  cmd_mkdir= "chmod 0777 "+ftppath+"/"+newdir+"\r\n";  
		try{
			return fc.sendSiteCommand(cmd_mkdir);
		}catch(Exception e){
			return false;
		}
    }
    
    /**
     * 改变工作路径
     * @param dir
     * @return
     */
    public  boolean dftp_chdir(String dir){
    	boolean workboolean;
		try{
			workboolean =   fc.changeWorkingDirectory(dir);
			return workboolean;
		}catch(Exception e){
			return false;
		}
    }
    public boolean isdirwork(String directory){
    	try{
    		String path = fc.printWorkingDirectory();
    		String targetpath = ftppath+"/"+directory;
    		if(targetpath.startsWith(".")){
    			targetpath = targetpath.substring(1);
    		}
    		return targetpath.equals(path);
    	}catch(Exception e){
    		return false;
    	}
    }
    public void cdrootdir(){
    	try {
			fc.changeWorkingDirectory(ftppath);
		} catch (IOException e) {
		}
    }
    public boolean put(String sourcename, String targetname, boolean test, String directory){
    		if(test){
    			connectToServer();
    		}
    		try {
    			if(!test){
    				if(!isdirwork(directory)){
    					if(!fc.changeWorkingDirectory(ftppath)){
    						return false;
    					}
    					if(fc.changeWorkingDirectory(directory)){
    						return false;
    					}
    				}
    			}
    			fc.setBufferSize(3072);
    			fc.setFileType(FTPClient.BINARY_FILE_TYPE);
        		InputStream is = new FileInputStream(sourcename);
        		boolean strore = fc.storeFile(targetname, is);
				is.close();
				return strore;
			} catch (IOException e) {
				e.printStackTrace();
				return false;
			}
    }
    public  boolean get(String local_file,String remote_file){
    		try {
    			fc.setBufferSize(2076);
    			fc.setFileType(FTPClient.BINARY_FILE_TYPE);
    			FileOutputStream os = new FileOutputStream(local_file);
				fc.retrieveFile(remote_file, os);
				os.close();
				return true;
			} catch (IOException e) {
				return false;
			}
    }
    public boolean readfile(String url,OutputStream os){
    	InputStream in=null;
    	URL servletURL =null;
		try {
			servletURL = new URL(url);
			servletURL.openConnection();
			in = servletURL.openStream();
			if(os!=null){
				byte[] bytes=new byte[1024];
	    		int c;
	    		while ((c=in.read(bytes))!=-1){
	    			os.write(bytes,0,c);
	    		}
			}
    		return true;
		} catch (Exception e) {
			return false;
		}finally{
			try{
				if(in!=null){
					in.close();
				}
			}catch(Exception e){}
			servletURL=null;
		}
    }
}