java利用Jsch實現從linux服務端下載檔案

         直接貼程式碼，大家只需改下配置，且充分驗證可行。
         吐槽下，網上這類文章很多，但是沒幾個能用的（基本都是少依賴的類檔案），真是坑啊！

1. 設計一個SshConfiguration類，如下：

package com.cheers.qa;

public class SshConfiguration {
	private String host;
	private String username;
	private String password;
	private int port;
	public String getHost() {
		return host;
	}
	public void setHost(String host) {
		this.host = host;
	}
	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 int getPort() {
		return port;
	}
	public void setPort(int port) {
		this.port = port;
	}	
}
 

2. 獲取linux服務端檔案程式碼如下：

package com.cheers.qa;

import java.io.File;
import java.util.Properties;
import com.jcraft.jsch.ChannelSftp;
import com.jcraft.jsch.JSch;
import com.jcraft.jsch.JSchException;
import com.jcraft.jsch.Session;
import com.jcraft.jsch.SftpException;

public class TranscodingAnalyzerDemo {

	private ChannelSftp channelSftp;  
    private Session session=null;  
    private int timeout=60000;  
      
    public TranscodingAnalyzerDemo(SshConfiguration conf) throws JSchException{  
        System.out.println("try connect to  "+conf.getHost()+",username: "+conf.getUsername()+",password: "+conf.getPassword()+",port: "+conf.getPort());  
        JSch jSch=new JSch(); //建立JSch物件  
        session=jSch.getSession(conf.getUsername(), conf.getHost(), conf.getPort());//根據使用者名稱，主機ip和埠獲取一個Session物件  
        session.setPassword(conf.getPassword()); //設定密碼  
        Properties config=new Properties();  
        config.put("StrictHostKeyChecking", "no");  
        session.setConfig(config);//為Session物件設定properties  
        session.setTimeout(timeout);//設定超時  
        session.connect();//通過Session建立連線         
    }  
    public void download(String src,String dst) throws JSchException, SftpException, InterruptedException{  
        //src linux伺服器檔案地址，dst 本地存放地址 
        //判斷 如果本地dst如果存在，則先刪除，然後在下載 
		File file = new File(dst);
		if(file.exists())
		{
			file.delete();
			Thread.sleep(1000);
		}
        channelSftp=(ChannelSftp) session.openChannel("sftp");  
        channelSftp.connect();  
        channelSftp.get(src, dst);  
        System.out.println(">>>>>>>>>>  File:"+src+" has downloaded success!");
        channelSftp.quit();  
    }  
    public void close(){  
        session.disconnect();  
    }  
	
	public static void main(String[] args)
	{
		 SshConfiguration configuration=new SshConfiguration();  
	        configuration.setHost("192.168.1.26");  
	        configuration.setUsername("cheersqa");  
	        configuration.setPassword("123456");  
	        configuration.setPort(22);  
	        try{  
	        	TranscodingAnalyzerDemo sshUtil=new TranscodingAnalyzerDemo(configuration);  
	            sshUtil.download("/opt/cheerstest1/1111111111","logs1_26");  
	            sshUtil.close();  
	        }catch(Exception e){  
	            e.printStackTrace();  
	        }      
	}
}