jdk.ftp

package ftp.jdk;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;

import sun.net.TelnetInputStream;
import sun.net.ftp.FtpClient;
import ftp.FtpUser;
/**
 * JavaJDK自带ftp操作
 * @author  cKF29080
 * @version  [版本号, Nov 24, 2010]
 * @see  [相关类/方法]
 * @since  [产品/模块版本]
 */
public class FtpJdk {

    private  FtpClient ftpClient =null;

    public boolean loginFtp(String path)
    throws Exception {
    boolean isSuccess = false;
    Properties properties = new Properties();
    try {
        File file=new  File(path);
        InputStream fileInputStream=new FileInputStream(file);
        properties.load(fileInputStream);
        String ip = properties.getProperty("Ip");
        String name = properties.getProperty("Ip");
        String ps = properties.getProperty("Ip");
       // saveDir = new String(saveDir.getBytes("ISO-8859-1"),"UTF-8");
        fileInputStream.close();
        ftpClient = new FtpClient(ip);
        String  str = ftpClient.getResponseString();  
            System.out.println("log: "+str);
        ftpClient.login(name,ps);
        isSuccess = true;
    } catch (Exception ex) {
        throw new Exception("Connect ftp server error:" + ex.getMessage());
    }
    return isSuccess;
    }

   /**
    * 下载文件
    * @param remotePath ftp目录
    * @param localPath 下载本地目录
    * @param filename  下载文件名称
    * @return [参数说明] 
    * @return boolean [返回类型说明]
    * @exception throws [违例类型] [违例说明]
    * @see [类、类#方法、类#成员]
    */
    public  boolean downloadFile(String remotePath,String localPath, String filename) {
    try {
        
        if (remotePath.length() == 0){
            
            return false;
        }
        /**更改目录*/
        ftpClient.cd(remotePath);
        String str = ftpClient.getResponseString() ;   
        System.out.println("log:"+str) ;     
        /****设置为 二进制输出***/ 
        ftpClient.binary();
          /***获得文件流***/
        TelnetInputStream is = ftpClient.get(filename);
        /**构造本地路径**/
        File file =new File(localPath);
        if (!file.exists()) {
        file.mkdirs();
        }
        File file_out = new File(file, filename);
        /**输出流**/
        FileOutputStream os = new FileOutputStream(file_out);
        byte[] bytes = new byte[1024];
        int c;
        while ((c = is.read(bytes)) != -1) {
        os.write(bytes, 0, c);
        }
        is.close();
        os.close();
        ftpClient.closeServer();
    } catch (FileNotFoundException e) {
        e.printStackTrace();
        return false;
    } catch (IOException e) {
        e.printStackTrace();
        return false;
    }
    return true;

    }
}