1.准备jar包:jsch-0.1.46.jar
2.SFTPConstants.java
public class SFTPConstants {
public static final String SFTP_REQ_HOST = "host";
public static final String SFTP_REQ_PORT = "port";
public static final String SFTP_REQ_USERNAME = "username";
public static final String SFTP_REQ_PASSWORD = "password";
public static final int SFTP_DEFAULT_PORT = 22;
public static final String SFTP_REQ_LOC = "location";
}
3.SFTPChannel.java
import java.util.Map;
import java.util.Properties;
import org.apache.log4j.Logger;
import com.jcraft.jsch.Channel;
import com.jcraft.jsch.ChannelSftp;
import com.jcraft.jsch.JSch;
import com.jcraft.jsch.JSchException;
import com.jcraft.jsch.Session;
public class SFTPChannel {
Session session = null;
Channel channel = null;
private static final Logger LOG = Logger.getLogger(SFTPChannel.class.getName());
public ChannelSftp getChannel(Map<String, String> sftpDetails, int timeout) throws JSchException {
String ftpHost = sftpDetails.get(SFTPConstants.SFTP_REQ_HOST);
String port = sftpDetails.get(SFTPConstants.SFTP_REQ_PORT);
String ftpUserName = sftpDetails.get(SFTPConstants.SFTP_REQ_USERNAME);
String ftpPassword = sftpDetails.get(SFTPConstants.SFTP_REQ_PASSWORD);
int ftpPort = SFTPConstants.SFTP_DEFAULT_PORT;
if (port != null && !port.equals("")) {
ftpPort = Integer.valueOf(port);
}
JSch jsch = new JSch(); // 创建JSch对象
session = jsch.getSession(ftpUserName, ftpHost, ftpPort); // 根据用户名,主机ip,端口获取一个Session对象
LOG.debug("Session created.");
if (ftpPassword != null) {
session.setPassword(ftpPassword); // 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timeout时间
session.connect(); // 通过Session建立链接
LOG.debug("Session connected.");
LOG.debug("Opening Channel.");
channel = session.openChannel("sftp"); // 打开SFTP通道
channel.connect(); // 建立SFTP通道的连接
LOG.debug("Connected successfully to ftpHost = " + ftpHost + ",as ftpUserName = " + ftpUserName
+ ", returning: " + channel);
return (ChannelSftp) channel;
}
public void closeChannel() throws Exception {
if (channel != null) {
channel.disconnect();
}
if (session != null) {
session.disconnect();
}
}
}
4.SFTPGetTest.java
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Vector;
import com.alibaba.fastjson.JSON;
import com.jcraft.jsch.ChannelSftp;
import com.jcraft.jsch.SftpATTRS;
import com.jcraft.jsch.ChannelSftp.LsEntry;
import com.jcraft.jsch.SftpProgressMonitor;
public class SFTPGetTest {
public SFTPChannel getSFTPChannel() {
return new SFTPChannel();
}
public static void main(String[] args) throws Exception {
SFTPGetTest test = new SFTPGetTest();
Map<String, String> sftpDetails = new HashMap<String, String>();
// 设置主机ip,端口,用户名,密码
sftpDetails.put(SFTPConstants.SFTP_REQ_HOST, "134.64.XX.XX"); // ip
sftpDetails.put(SFTPConstants.SFTP_REQ_USERNAME, "XXXX"); // 用户名
sftpDetails.put(SFTPConstants.SFTP_REQ_PASSWORD, "XXXX"); // 密码
sftpDetails.put(SFTPConstants.SFTP_REQ_PORT, "22"); // 端口:22
SFTPChannel channel = test.getSFTPChannel();
ChannelSftp chSftp = channel.getChannel(sftpDetails, 60000);
String filename = "/opt/crm21/clerkSale/20161115/201611151651020897178_A.jpeg"; // ftp服务器上的路径+名称
String dst = "D:\\test123.jpeg"; // 要保存的地址
try {
chSftp.get(filename, dst); // 代码段1
} catch (Exception e) {
e.printStackTrace();
} finally {
chSftp.quit();
channel.closeChannel();
}
}
}