springboot以FTP方式上传文件到远程服务器

        此处远程服务器是ubuntu,关于ftpserver的配置请参考该文https://blog.csdn.net/sunxiaoju/article/details/85224602,在此处就不再赘述。该篇文章主要针对如何实现代码来进行代码干货的分享。

        本小编用的前台为layui框架。话不多说直接上干货,代码没什么好解释的,直接贴出前后台代码以供大家分享使用。

一、html代码

                    

二、js代码

        upload.render({
            accept: 'file',
            elem: '#larry-litpic',
            url: interface_cms_article_upload,
            field: 'fileNames',
            done : function (res, index, upload) {
                if(res.code != 200){
                    layer.open({
                        icon : 2,
                        skin : "layui-layer-molv",
                        content : res.msg
                    });
                }else{
                    layer.open({
                        icon : 1,
                        skin : "layui-layer-molv",
                        content : res.msg
                    });
                    $('#upload-filename-display').text(res.filename);
                    $("input[name='fileId']").val(res.filename);
                }
            },
            error : function (res) {

            }
        });

三、后台controller:

    @RequestMapping(value = "/upload")
    @ApiOperation(value = "本地文件上传",notes ="本地文件上传" )
    public Map uploadfunction(HttpServletRequest request, HttpServletResponse response){
        //创建文件对象并获取请求中的文件对象
        MultipartFile file = null;
        Map resultData = new HashMap();

        try{
            MultipartHttpServletRequest mRequest = (MultipartHttpServletRequest) request;
            file = mRequest.getFile("fileNames");

            //判断上传非空
            if(null == file) {
                resultData.put("code",0);
                resultData.put("msg","上传文件失败");
                resultData.put("filename",file.getOriginalFilename());
                return resultData;
            }
            //上传需要导入数据的文件
            //用来检测程序运行时间
            long  startTime=System.currentTimeMillis();
            System.out.println("上传的文件名为:"+file.getOriginalFilename());
            String fileName = file.getOriginalFilename();

            InputStream inputStream = file.getInputStream();

            String hostName = uploadUtil.getHostname();
            String username = uploadUtil.getUsername();
            String password = uploadUtil.getPassword();
            String targetPath = uploadUtil.getTargetPath();
            String suffix = cmsArticleService.getSuffix(fileName);
            fileName = cmsArticleService.upload(hostName,username,password,targetPath,suffix,inputStream);
            //计算上传时间
            long  endTime=System.currentTimeMillis();
            String uploadTime = String.valueOf(endTime-startTime);
            System.out.println("上传所用时间:"+uploadTime+"ms");

            resultData.put("code",200);
            resultData.put("msg","上传文件成功");
            resultData.put("filename",fileName);
            return resultData;

        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return null;
    }

四、后台service上传至远程服务器

    //FTP文件上传
    public static String upload(String hostname,String username,String password,
                                String targetPath,String suffix,InputStream inputStream) throws SocketException, IOException {
        //实例化ftpClient
        FTPClient ftpClient = new FTPClient();
        //设置登陆超时时间,默认是20s
        ftpClient.setDataTimeout(12000);
        //1.连接服务器
        ftpClient.connect(hostname,21);
        //2.登录(指定用户名和密码)
        boolean b = ftpClient.login(username,password);
        if(!b) {
            System.out.println("登陸超時");
            if (ftpClient.isConnected()) {
                // 断开连接
                ftpClient.disconnect();
            }
        }
        // 设置字符编码
        ftpClient.setControlEncoding("UTF-8");
        //基本路径,一定存在
        String basePath="/";
        String[] pathArray = targetPath.split("/");
        for(String path:pathArray){
            basePath+=path+"/";
            //3.指定目录 返回布尔类型 true表示该目录存在
            boolean dirExsists = ftpClient.changeWorkingDirectory(basePath);
            //4.如果指定的目录不存在,则创建目录
            if(!dirExsists){
                //此方式,每次,只能创建一级目录
                boolean flag=ftpClient.makeDirectory(basePath);
                if (flag){
                 System.out.println("创建成功!");
                }
            }
        }
        //重新指定上传文件的路径
        ftpClient.changeWorkingDirectory(targetPath);
        //5.设置上传文件的方式
        ftpClient.setFileType(FTP.BINARY_FILE_TYPE);
        //使用uuid,保存文件名唯一性
        String uuid= UUID.randomUUID().toString();
        /**
         * 6.执行上传
         * remote 上传服务后,文件的名称
         * local 文件输入流
         * 上传文件时,如果已经存在同名文件,会被覆盖
         */
        boolean uploadFlag = ftpClient.storeFile(uuid+suffix,inputStream);
        if(uploadFlag)
            System.out.println("上传成功!");
        return uuid+suffix;
    }

五、获取yml配置的工具类

@Data
@Component
public class UploadUtil {
    @Value("${upload.hostname}")
    private String hostname;
    @Value("${upload.username}")
    private String username;
    @Value("${upload.password}")
    private String password;
    @Value("${upload.targetPath}")
    private String targetPath;
}

 

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