commons-net

/**
 * @author Mr.css
 * @version 2022-11-14 10:23
 */
public class TestFtp {

    public static void main1(String[] args) throws IOException {
        FtpProperties ftpProperties = new FtpProperties();
        ftpProperties.setHost("127.0.0.1");
        ftpProperties.setPassword("djw");
        ftpProperties.setUsername("djw");
		FtpClientPooled ftpClient = new FtpClientPooled(ftpProperties);

        String[] names;
        try (Ftp ftp = ftpClient.build()) {
            System.out.println(ftp.pwd());
            names = ftp.cd("ftp/hes").listNames();
            System.out.println(Arrays.toString(names));
        }

        File root = new File("C:\\Users\\ASUS\\Desktop\\test");
        int cnt = 1;
        while (cnt-- > 0) {
            int finalCnt = cnt;
            new Thread(() -> {
                for (String name : names) {
                    File out = new File(root, finalCnt + "_" + name);
                    try (Ftp ftp = ftpClient.build();
                         FileOutputStream os = new FileOutputStream(out)) {
                        ftp.cd("ftp/hes").download(name, os);
                    } catch (IOException e) {
                        e.printStackTrace();
                        System.out.println(finalCnt);
                    }
                }
            }).start();
        }
    }

    public static void main(String[] args) throws IOException {
        FtpProperties properties = new FtpProperties();
        properties.setHost("127.0.0.1");
        properties.setPort(21);
        properties.setUsername("djw");
        properties.setPassword("djw");
        properties.setPassiveMode(true);
        properties.setEncoding(Charset.defaultCharset().name());

        FtpClient ftpClient = new FtpClient(properties);

        Ftp ftp = ftpClient.build();

        System.out.println(ftp.pwd());
        String[] names = ftp.listNames();
        System.out.println(Arrays.toString(names));

        ftp.cd("ftp");

        try(FileOutputStream os = new FileOutputStream(new File("C:\\Users\\ASUS\\Desktop\\testtest.xls"))){
            ftp.download("abc20230706094050.xlsx", os);
        }
    }
}

<dependencies>
    <!--http-->
    <dependency>
        <groupId>org.apache.httpcomponents</groupId>
        <artifactId>httpclient</artifactId>
        <version>4.5.13</version>
    </dependency>
    <dependency>
        <groupId>org.apache.httpcomponents</groupId>
        <artifactId>httpmime</artifactId>
        <version>4.5.13</version>
    </dependency>

    <!-- ftp -->
    <dependency>
        <groupId>commons-net</groupId>
        <artifactId>commons-net</artifactId>
        <version>3.8.0</version>
    </dependency>

    <!--apache连接池-->
    <dependency>
        <groupId>org.apache.commons</groupId>
        <artifactId>commons-pool2</artifactId>
        <version>2.8.0</version>
    </dependency>
</dependencies>