edtftpj.jar包 FTP中下载数据

import java.io.IOException;

import com.enterprisedt.net.ftp.FTPClient;
import com.enterprisedt.net.ftp.FTPConnectMode;
import com.enterprisedt.net.ftp.FTPException;
import com.enterprisedt.net.ftp.FTPTransferType;

public class TestFTPDownload {
 
 private String hostName = "198.98.251.94";//FTP IP
 
 private String userName = "root";//连接FTP的账号
 
 private String password = "root";//连接FTP的密码
 
 private int remotePort = 21;//端口号，默认为21
 
 private String localDirName = "I:/data/20160320/";//本地文件夹
 
 private String remoteDirName = "/data/20160320";//FTP中的文件夹
 
 /**
  * 建立FTP连接
  * @throws FTPException
  * @throws IOException
  */
 public FTPClient connectFTP() throws IOException, FTPException{
  FTPClient client = new FTPClient();
  client.setRemoteHost(hostName);
  client.setRemotePort(remotePort);
  client.setControlEncoding("GB2312");
  client.connect();
  client.setTimeout(12000);//设置超时时间
  client.login(userName, password);
  client.setType(FTPTransferType.BINARY);//二进制
  client.setConnectMode(FTPConnectMode.PASV);//以波动模式链接
  return client;
 }
 /**
  * 改变远程虚拟目录路径
  * @param client
  * @return
  */
 public boolean changeRemoteDir(FTPClient client){
  String[] dirName = remoteDirName.split("/");
  for(int i=0;i<dirName.length;i++){
   try {
    //逐层进入文件夹
    System.out.println(dirName[i]);
    client.chdir(dirName[i]);
   } catch (IOException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
    return false;
   } catch (FTPException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
    return false;
   }
  }
  return true;
 }
 /**
  * 下载文件
  * @param client
  * @return
  */
 public boolean downloadFile(FTPClient client){
  try {
   String[] files = client.dir();
   for(int i=0;i<files.length;i++){
    client.get(localDirName+files[i],files[i]);
   }
   
  } catch (IOException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
   return false;
  } catch (FTPException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
   return false;
  }
  return true;
 }
 
 /**
  * @param args
  */
 public static void main(String[] args) {
  // TODO Auto-generated method stub
  TestFTPDownload test = new TestFTPDownload();
  try {
   FTPClient client = test.connectFTP();
   if(test.changeRemoteDir(client)){
    test.downloadFile(client);
   }
   
  } catch (IOException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  } catch (FTPException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }
 }

}