java sftp文件上传核心代码

package sftp;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.util.Properties;

import com.jcraft.jsch.Channel;
import com.jcraft.jsch.ChannelSftp;
import com.jcraft.jsch.JSch;
import com.jcraft.jsch.Session;
import com.jcraft.jsch.SftpException;

public class SFTPUtil {

private String host = "172.30.104.40";
private String username="weblogic";
private String password="weblogic";
private int port = 22;
private ChannelSftp sftp = null;
private static final  String linuxFileSeparator = "/";

public SFTPUtil(){}

public SFTPUtil(String host, String username, String password, int port){
this.host = host;
this.username = username;
this.password = password;
this.port = port;
}
/**
* connect server via sftp
*/
public void connect() {
try {
if(sftp != null){
System.out.println("sftp is not null");
}
JSch jsch = new JSch();
jsch.getSession(username, host, port);
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();
sshSession.setTimeout(1000*60*10);
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();
}
}
/**
* Disconnect with server
*/
public void disconnect() {
if(this.sftp != null){
if(this.sftp.isConnected()){
this.sftp.disconnect();
}else if(this.sftp.isClosed()){
System.out.println("sftp is closed already");
}
}

}

public void download(String remoteDirectory, String remoteDownloadFileName, String localSaveFilePath) {
try {
this.sftp.cd(remoteDirectory);
File file = new File(localSaveFilePath);
this.sftp.get(remoteDownloadFileName, new FileOutputStream(file));
System.out.println("download remote file[" + remoteDirectory + linuxFileSeparator + remoteDownloadFileName + "] to local " + localSaveFilePath);
} catch (Exception e) {
e.printStackTrace();
}
}

/**
* upload one file to the server
*/
public void upload(String localFilePath, String remoteFileDirectory) {
try {
File file = new File(localFilePath);

if(file.isFile()){
System.out.println("localFile : " + file.getAbsolutePath());
System.out.println("remotePath:" + remoteFileDirectory);
this.sftp.cd(remoteFileDirectory);
this.sftp.put(new FileInputStream(file), file.getName());
System.out.println("=========upload file for " + localFilePath);
}
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (SftpException e) {
e.printStackTrace();
}
}

/**
* @return the host
*/
public String getHost() {
return host;
}

/**
* @param host the host to set
*/
public void setHost(String host) {
this.host = host;
}

/**
* @return the username
*/
public String getUsername() {
return username;
}

/**
* @param username the username to set
*/
public void setUsername(String username) {
this.username = username;
}

/**
* @return the password
*/
public String getPassword() {
return password;
}

/**
* @param password the password to set
*/
public void setPassword(String password) {
this.password = password;
}

/**
* @return the port
*/
public int getPort() {
return port;
}

/**
* @param port the port to set
*/
public void setPort(int port) {
this.port = port;
}

/**
* @return the sftp
*/
public ChannelSftp getSftp() {
return sftp;
}

/**
* @param sftp the sftp to set
*/
public void setSftp(ChannelSftp sftp) {
this.sftp = sftp;
}

public static void main(String[] args) {
SFTPUtil ftp= new SFTPUtil();
ftp.connect();
ftp.upload("c:\\RpStatisticsAmountVO.java", "/home/weblogic/job");
ftp.download("/home/weblogic/job", "RpStatisticsAmountVO.java", "d:\\RpStatisticsAmountVO.java");
ftp.disconnect();
}

}