日常跑數(shù)的文件存放于FTP服務器需要定期刪除争便；寫一個刪除FTP指定路徑指定日期之前文件的工具類断医，后續(xù)或可應用于定時任務調度。
使用到的jar包：commons-net-3.8.0.jar
入參：FTP指定文件夾路徑斩启；指定日期時間
代碼：

package com.example.demo.controller;

import org.apache.commons.net.ftp.FTPClient;
import org.apache.commons.net.ftp.FTPFile;
import org.apache.commons.net.ftp.FTPReply;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Date;

@RestController
public class FTPFileClean {

    private Logger logger= LoggerFactory.getLogger(getClass());

    private FTPClient ftp;
    private Date date;

    @RequestMapping("/FTPFileClean")
    public String clean(String vFolder, String vDate) {
        // 獲取FTP參數(shù)
        String ftpIP = "192.168.0.21";
        String ftpUserName = "username";
        String ftpPassword = "password";
        int ftpPort = 21;
        this.ftp = new FTPClient();
        this.ftp.setControlEncoding("UTF-8");
        try {
            int reply;
            this.ftp.connect(ftpIP, ftpPort);
            this.ftp.login(ftpUserName, ftpPassword);
            reply = this.ftp.getReplyCode();
            if (!FTPReply.isPositiveCompletion(reply)) {
                this.ftp.disconnect();
                return "FTP登錄失敗";
            }
            SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm");
            date = sdf.parse(vDate);
            //遞歸刪除該文件下過期文件
            deleteFile(vFolder);

            ftp.logout();
            return "成功";
        }
        catch (Exception e) {
            return "刪除文件失斖么亍荣挨！" + e.getMessage();
        }
        finally {
            if (ftp.isConnected()) {
                try {
                    ftp.disconnect();
                } catch (IOException ioe) {

                }
            }
        }
    }

    /**
     * 遞歸刪除文件
     * @param vFolder
     * @throws IOException
     */
    private void deleteFile(String vFolder) throws IOException {
        if (vFolder.startsWith("/") && vFolder.endsWith("/")) {
            FTPFile[] files = null;
            this.ftp.changeWorkingDirectory(vFolder);
            //需要設置一下模式才能獲取子文件列表
            this.ftp.enterLocalPassiveMode();
            files = this.ftp.listFiles();
            for (FTPFile file : files) {
                if (file.isFile()) {
                    // 判斷是否在指定日期之前
                    if (new Date(file.getTimestamp().getTimeInMillis()).before(date)) {
                        //需要再設置一下ftp路徑才能刪除
                        this.ftp.changeWorkingDirectory(vFolder);
                        this.ftp.deleteFile(file.getName());
                        System.out.println("刪除文件："+file.getName());
                    }
                }
                else if (file.isDirectory()) {
                    // 需要判斷是否為該目錄(./)及上級目錄(../)朴摊。否則納入遞歸會陷死循環(huán)
                    if (!".".equals(file.getName()) && !"..".equals(file.getName())) {
                        deleteFile(vFolder + file.getName() + "/");
                    }
                }
            }
        }
    }
}