java利用jcraft实现和远程服务器交互，实现上传下载文件

git地址：https://github.com/fusugongzi/upLoadAndDownloadFile

第一步：引入maven支持，添加maven依赖

<!-- https://mvnrepository.com/artifact/com.jcraft/jsch -->
<dependency>
<groupId>com.jcraft</groupId>
<artifactId>jsch</artifactId>
<version>0.1.54</version>
</dependency>

第二步：写一个类sshconfiguration，作用是存储要登录机器的host,port,username.pwd

public class SshConfiguration {
private String host;
private int    port;
private String userName;
private String password;

public String getHost() {
return host;
}

public void setHost(String host) {
this.host = host;
}

public int getPort() {
return port;
}

public void setPort(int port) {
this.port = port;
}

public String getUserName() {
return userName;
}

public void setUserName(Strin
4000
g userName) {
this.userName = userName;
}

public String getPassword() {
return password;
}

public void setPassword(String password) {
this.password = password;
}

public SshConfiguration(String host, int port, String userName, String password) {
this.host = host;
this.port = port;
this.userName = userName;
this.password = password;
}

public SshConfiguration(){}
}

第三步：写一个类sshutil，实现上传下载

public class SshUtil {
private ChannelSftp channelSftp;
private ChannelExec channelExec;
private Session session=null;
private int timeout=60000;

public SshUtil(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(); //创建JSch对象
session=jSch.getSession(conf.getUserName(), conf.getHost(), conf.getPort());//根据用户名，主机ip和端口获取一个Session对象
session.setPassword(conf.getPassword()); //设置密码
Properties config=new Properties();
config.put("StrictHostKeyChecking", "no");
session.setConfig(config);//为Session对象设置properties
session.setTimeout(timeout);//设置超时
session.connect();//通过Session建立连接
}
public void download(String src,String dst) throws JSchException, SftpException{
//src linux服务器文件地址，dst 本地存放地址
channelSftp=(ChannelSftp) session.openChannel("sftp");
channelSftp.connect();
channelSftp.get(src, dst);
channelSftp.quit();
}
public void upLoad(String src,String dst) throws JSchException,SftpException{
//src 本机文件地址。 dst 远程文件地址
channelSftp=(ChannelSftp) session.openChannel("sftp");
channelSftp.connect();
channelSftp.put(src, dst);
channelSftp.quit();
}
public void close(){
session.disconnect();
}
public static void main(String[] args){
SshConfiguration configuration=new SshConfiguration();
configuration.setHost("172.17.1.232");
configuration.setUserName("root");
configuration.setPassword("root275858");
configuration.setPort(22);
try{
//            SshUtil sshUtil=new SshUtil(configuration);
//            sshUtil.download("/home/cafintech/Logs/metaData/meta.log","D://meta.log");
//            sshUtil.close();
//            System.out.println("文件下载完成");
SshUtil sshUtil=new SshUtil(configuration);
sshUtil.upLoad("D://meta.log","/home/cafintech/");
sshUtil.close();
System.out.println("文件上传完成");
}catch(Exception e){
e.printStackTrace();
}
}
}

github地址：https://github.com/fusugongzi/upLoadAndDownloadFile