java 之 jsch 实现sftp下载，上传

package com.supan.sftp;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.util.Properties;
import java.util.Vector;
import junit.framework.TestCase;
import com.jcraft.jsch.Channel;
import com.jcraft.jsch.ChannelSftp;
import com.jcraft.jsch.JSch;
import com.jcraft.jsch.Session;
import com.jcraft.jsch.SftpATTRS;
import com.jcraft.jsch.SftpException;
import com.jcraft.jsch.ChannelSftp.LsEntry;
public class SftpTest extends TestCase {
    public ChannelSftp connect(String host, int port, String username, String password) {  
        ChannelSftp sftp = null;  
        try {  
            JSch jsch = new JSch();  
            Session sshSession = jsch.getSession(username, host, port);  
            System.out.println("Session created. ");  
            sshSession.setPassword(password);
            Properties sshConfig = new Properties();  
            sshConfig.put("StrictHostKeyChecking", "no");  
            sshSession.setConfig(sshConfig);  
            sshSession.connect();  
            System.out.println("Session connected.");  
            System.out.println("Opening Channel.");  
            Channel channel = sshSession.openChannel("sftp");  
            channel.connect();  
            sftp = (ChannelSftp) channel;  
            System.out.println("Connected to " + host + ".");  
        } catch (Exception e) {  
            e.printStackTrace();  
        }  
        return sftp;  
    }  
    /** 
     * 下載文件 * @param directory下載目錄 * @param downloadFile下載的文件 * @param saveFile存在本地的路徑 * @param sftp 
     */  
    public void download(String directory, String downloadFile, String saveFile, ChannelSftp sftp) {  
        try {  
            sftp.cd(directory);  
            File file = new File(saveFile);  
            FileOutputStream fileOutputStream =new FileOutputStream(file);  
            sftp.get(downloadFile, fileOutputStream );  
            fileOutputStream.close();  
            fileOutputStream=null;  
            file =null;  
        } catch (Exception e) {  
            e.printStackTrace();  
        }  
    }
    /** 
     * 上傳文件 * @param directory上傳的目錄 * @param uploadFile要上傳的文件 * @param sftp 
     */  
    public void upload(String directory, String uploadFile, ChannelSftp sftp) {  
        try {  
            sftp.cd(directory);  
            File file = new File(uploadFile); 
            FileInputStream fileInputStream = new FileInputStream(file);
            sftp.put(fileInputStream, file.getName());  
            fileInputStream.close();  
            fileInputStream=null;  
        } catch (Exception e) {  
            e.printStackTrace();  
        }  
    }  
    public void testSftp()
    {
    	ChannelSftp channelSftp = connect("192.168.159.128",22,"root","supanccy");
    	download("ssh-3.2.9.1","FAQ","c://FAQ",channelSftp);
    }
    public void testAllPfiles()
    {
    	ChannelSftp channelSftp = connect("192.168.159.128",22,"root","supanccy");
//    	channelSftp.cd("ssh-3.2.9.1");
    	try {
		 Vector<LsEntry> filelist = channelSftp.ls("ssh-3.2.9.1");
		 for(LsEntry entry : filelist)
		 {
			 System.out.println(entry.getFilename());
			 SftpATTRS attrs = entry.getAttrs();
			 //获取读取权限
			 System.out.println(attrs.getPermissionsString());
			 //获取时间戳1
			 System.out.println(attrs.getMtimeString());
			 //获取事件戳
			 System.out.println(attrs.getAtimeString());
			 System.out.println("**************");
		 }
		} catch (SftpException e) {
			e.printStackTrace();
		}
    }
}