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读取ftp服务器上面的文件夹以及子文件名称,只需要获取名称,并不从ftp上面下载
package com.pd.test;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.SocketException;
import java.text.ParseException;
import java.util.ArrayList;
import java.util.List;
import org.apache.commons.net.ftp.FTPClient;
import org.apache.commons.net.ftp.FTPFile;
/**
* @describe 读取FTP上的文件
* @auto zhangling
* @date 2013-11-18 下午4:07:34
*/
public class FtpUtils {
private FTPClient ftpClient;
private String strencoding;
private String ip = "192.168.1.249"; // 服务器IP地址
private String userName = "anonymous"; // 用户名
private String userPwd = ""; // 密码
private int port = 21; // 端口号
private String path = "Alam/192.168.1.229/"; // 读取文件的存放目录
/**
* init ftp servere
*/
public FtpUtils() {
this.reSet();
}
public void reSet() {
// 以当前系统时间拼接文件名
strencoding = "GBK";
this.connectServer(ip, port, userName, userPwd, path);
}
/**
* @param ip
* @param port
* @param userName
* @param userPwd
* @param path
* @throws SocketException
* @throws IOException function:连接到服务器
*/
public void connectServer(String ip, int port, String userName, String userPwd, String path) {
ftpClient = new FTPClient();
try {
// 连接
ftpClient.connect(ip, port);
// 登录
ftpClient.login(userName, userPwd);
if (path != null && path.length() > 0) {
// 跳转到指定目录
ftpClient.changeWorkingDirectory(path);
}
} catch (SocketException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
/**
* @throws IOException function:关闭连接
*/
public void closeServer() {
if (ftpClient.isConnected()) {
try {
ftpClient.logout();
ftpClient.disconnect();
} catch (IOException e) {
e.printStackTrace();
}
}
}
/**
* @param path
* @return function:读取指定目录下的文件名
* @throws IOException
*/
public List<String> getFileList(String path) throws ParseException {
List<String> fileLists = new ArrayList<String>();
// 获得指定目录下所有文件名
FTPFile[] ftpFiles = null;
try {
ftpFiles = ftpClient.listFiles(path);
} catch (IOException e) {
e.printStackTrace();
}
for (int i = 0; ftpFiles != null && i < ftpFiles.length; i++) {
FTPFile file = ftpFiles;
if (file.isFile()) {
System.out.println("文件夹下面的文件====="+file.getName());
fileLists.add(file.getName());
}else if(file.isDirectory()){
System.out.println("文件夹名称为====="+file.getName());
List<String> childLists = getFileList(path + file.getName()+"/");
for(String childFileName : childLists){
fileLists.add(childFileName);
String fileType = childFileName.substring(childFileName.lastIndexOf(".")+1,childFileName.length());
System.out.println("文件类型为:"+fileType);
FtpUtils ftp = new FtpUtils();
if(fileType.equals("txt")){
System.out.println("文件名为:"+childFileName);
String content = "";
content = ftp.readFile(path + file.getName()+"/"+childFileName);
System.out.println("文件内容为:"+content);
}
}
}
}
return fileLists;
}
/**
* @param fileName
* @return function:从服务器上读取指定的文件
* @throws ParseException
* @throws IOException
*/
public String readFile(String fileName) throws ParseException {
InputStream ins = null;
StringBuilder builder = null;
try {
// 从服务器上读取指定的文件
ins = ftpClient.retrieveFileStream(fileName);
BufferedReader reader = new BufferedReader(new InputStreamReader(ins, strencoding));
String line;
builder = new StringBuilder(150);
while ((line = reader.readLine()) != null) {
System.out.println(line);
builder.append(line);
}
reader.close();
if (ins != null) {
ins.close();
}
// 主动调用一次getReply()把接下来的226消费掉. 这样做是可以解决这个返回null问题
ftpClient.getReply();
} catch (IOException e) {
e.printStackTrace();
}
return builder.toString();
}
/**
* @param fileName function:删除文件
*/
public void deleteFile(String fileName) {
try {
ftpClient.deleteFile(fileName);
} catch (IOException e) {
e.printStackTrace();
}
}
/**
* @param args
* @throws ParseException
*/
public static void main(String[] args) throws ParseException {
FtpUtils ftp = new FtpUtils();
List<String> str = ftp.getFileList("");
System.out.println("目录下包含的文件名称为:"+str);
for(String a : str){
System.out.println("文件名为:"+a);
}
ftp.closeServer();
}
} |
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