Java SpringBoot FTP 上传下载文件

<dependency>
        <groupId>cn.hutool</groupId>
        <artifactId>hutool-all</artifactId>
        <version>5.3.7</version>
</dependency>
<!--添加依赖-->
<dependency>
    <groupId>commons-net</groupId>
    <artifactId>commons-net</artifactId>
    <version>3.6</version>
</dependency>

Ftp ftp = new Ftp("ftpIp", ftpPort, "ftpUser", "ftpPassword");
try {
    //匿名登录，一定要设 被动模式
    ftp.setMode(FtpMode.Passive);
    //进入远程目录
    //ftp.cd("/opt/upload");
    File reportFile = FileUtil.file("D:/report.pdf");
    boolean flag = ftp.upload("/opt/upload", reportFile);    
    if (!flag) {
        throw new CustomException(7002, "FTP 上传报告失败");
    }
    //下载远程文件
    //ftp.download("/opt/upload", "test.jpg", FileUtil.file("e:/test2.jpg"));
    return StrUtil.format("ftp://{}:{}{}{}", hisFtpIp, hisFtpPort, ftpRemotePath, pdfFileName);
} catch (Exception ex) {
    toHisLogger.error(ex.getMessage(), ex);
    throw ex;
} finally {
    ftp.close();
}