失眠网 > spring boot使用ftp服务器实现图片上传

spring boot使用ftp服务器实现图片上传

时间：2023-04-28 16:26:14

一、前端代码

1、html [ 此处省略其他input标签 ]

2、javascript

<script type="text/javascript" src="/sell/js/jquery-2.1.0.js"></script>

/图片上传预览 IE是用了滤镜。function previewImage(file) {var MAXWIDTH = 90;var MAXHEIGHT = 90;var div = document.getElementById('preview');div.innerHTML = '<img id=imghead onclick=$("#previewImg").click()>';var img = document.getElementById('imghead');img.onload = function() {var rect = clacImgZoomParam(MAXWIDTH, MAXHEIGHT, img.offsetWidth, img.offsetHeight);img.width = rect.width;img.height = rect.height;// img.style.marginLeft = rect.left+'px';img.style.marginTop = rect.top + 'px';}var reader = new FileReader();reader.onload = function(evt) {img.src = evt.target.result;}reader.readAsDataURL(file.files[0]);}//图片上传function clacImgZoomParam(maxWidth, maxHeight, width, height) {var param = {top: 0,left: 0,width: width,height: height};if(width > maxWidth || height > maxHeight) {rateWidth = width / maxWidth;rateHeight = height / maxHeight;if(rateWidth > rateHeight) {param.width = maxWidth;param.height = Math.round(height / rateWidth);} else {param.width = Math.round(width / rateHeight);param.height = maxHeight;}}param.left = Math.round((maxWidth - param.width) / 2);param.top = Math.round((maxHeight - param.height) / 2);return param;}

二、SpringBoot后台

1、Controller

处理表单提交的内容，既可新增，又可修改。当图片文件未更新是，不用上传

@PostMapping("/save")public ModelAndView save(@Valid ProductForm productForm, //获取其他input标签内容，自动封装BindingResult bindingResult, //验证参数是否合法Map<String,Object> map, //ModelAndview返回绑定内容@RequestParam(value = "uploadFile" , required = false) MultipartFile uploadFile){if (bindingResult.hasErrors()){map.put("msg",bindingResult.getFieldError().getDefaultMessage());map.put("url","/sell/seller/product/list");return new ModelAndView("common/error",map);}ProductInfo productInfo = new ProductInfo();try {if(!StringUtils.isEmpty(productForm.getProductId())){productInfo = productService.findOne(productForm.getProductId());}else { //如果productId为空，表示是新增productForm.setProductId(KeyUtil.getUniqueKey());}//判断是否需要更新图片if (uploadFile.isEmpty()){//表示文件没有更新，不用上传log.info("[不需要更新图片]");//如果productId不为空，表示记录已经存在}else {log.info("[要更新图片]");Map uploadPictureMap = pictureService.uploadPicture(uploadFile);productForm.setProductIcon(uploadPictureMap.get("url").toString());}BeanUtils.copyProperties(productForm,productInfo);productService.save(productInfo);}catch (SellException e){map.put("msg",e.getMessage());map.put("url","/sell/seller/product/list");return new ModelAndView("common/error",map);}map.put("url","/sell/seller/product/list");return new ModelAndView("common/success", map);}

2、Service层的uploadPicture方法

上传文件到ftp服务器，相关配置来自配置文件

@Servicepublic class PictureServiceImpl implements PictureService {@Autowiredprivate ImageServerConfig imageServerConfig;@Overridepublic Map uploadPicture(MultipartFile uploadFile) {Map resultMap = new HashMap<>();try {//生成一个新的文件名//取原始文件名String oldName = uploadFile.getOriginalFilename();//生成新文件名//UUID.randomUUID();String newName = KeyUtil.getUniqueKey();newName = newName + oldName.substring(oldName.lastIndexOf("."));//图片上传String imagePath = new DateTime().toString("/yyyy/MM/dd");boolean result = FtpUtil.uploadFile(imageServerConfig.getAddress(), imageServerConfig.getPort(), imageServerConfig.getUsername(), imageServerConfig.getPassword(),imageServerConfig.getBastPath(), imagePath, newName, uploadFile.getInputStream());//返回结果if(!result) {resultMap.put("error", 1);resultMap.put("message", "文件上传失败");return resultMap;}resultMap.put("error", 0);//上传成功后图片的存储路径resultMap.put("url", imageServerConfig.getImageBaseUrl() + imagePath + "/" + newName);return resultMap;} catch (Exception e) {resultMap.put("error", 1);resultMap.put("message", "文件上传发生异常");return resultMap;}}}

3、ImageServerConfig及相关配置

ImageServerConfig类读取配置文件中的ftp服务器配置：

@Data@Component@ConfigurationProperties(prefix = "ftp")public class ImageServerConfig {private String address;private Integer port;private String username;private String password;private String bastPath;private String imageBaseUrl;}

application.yml配置文件：

ftp:address: 192.168.116.137port: 21username: ftpuserpassword: ftpuserbastPath: /home/ftpuser/www/imagesimageBaseUrl: http://192.168.116.137/images

以上就是SpringBoot图片上传的步骤，欢迎指教！！

FtpUtil文件上传工具类：

public class FtpUtil {/** * Description: 向FTP服务器上传文件 * @param host FTP服务器hostname * @param port FTP服务器端口 * @param username FTP登录账号 * @param password FTP登录密码 * @param basePath FTP服务器基础目录* @param filePath FTP服务器文件存放路径。例如分日期存放：//01/01。文件的路径为basePath+filePath* @param filename 上传到FTP服务器上的文件名 * @param input 输入流 * @return 成功返回true，否则返回false */ public static boolean uploadFile(String host, int port, String username, String password, String basePath,String filePath, String filename, InputStream input) {boolean result = false;FTPClient ftp = new FTPClient();try {int reply;ftp.connect(host, port);// 连接FTP服务器// 如果采用默认端口，可以使用ftp.connect(host)的方式直接连接FTP服务器ftp.login(username, password);// 登录reply = ftp.getReplyCode();if (!FTPReply.isPositiveCompletion(reply)) {ftp.disconnect();return result;}//切换到上传目录if (!ftp.changeWorkingDirectory(basePath+filePath)) {//如果目录不存在创建目录String[] dirs = filePath.split("/");String tempPath = basePath;for (String dir : dirs) {if (null == dir || "".equals(dir)) continue;tempPath += "/" + dir;if (!ftp.changeWorkingDirectory(tempPath)) {if (!ftp.makeDirectory(tempPath)) {return result;} else {ftp.changeWorkingDirectory(tempPath);}}}}//设置上传文件的类型为二进制类型ftp.setFileType(FTP.BINARY_FILE_TYPE);//上传文件if (!ftp.storeFile(filename, input)) {return result;}input.close();ftp.logout();result = true;} catch (IOException e) {e.printStackTrace();} finally {if (ftp.isConnected()) {try {ftp.disconnect();} catch (IOException ioe) {}}}return result;}/** * Description: 从FTP服务器下载文件 * @param host FTP服务器hostname * @param port FTP服务器端口 * @param username FTP登录账号 * @param password FTP登录密码 * @param remotePath FTP服务器上的相对路径 * @param fileName 要下载的文件名 * @param localPath 下载后保存到本地的路径 * @return */ public static boolean downloadFile(String host, int port, String username, String password, String remotePath,String fileName, String localPath) {boolean result = false;FTPClient ftp = new FTPClient();try {int reply;ftp.connect(host, port);// 如果采用默认端口，可以使用ftp.connect(host)的方式直接连接FTP服务器ftp.login(username, password);// 登录reply = ftp.getReplyCode();if (!FTPReply.isPositiveCompletion(reply)) {ftp.disconnect();return result;}ftp.changeWorkingDirectory(remotePath);// 转移到FTP服务器目录FTPFile[] fs = ftp.listFiles();for (FTPFile ff : fs) {if (ff.getName().equals(fileName)) {File localFile = new File(localPath + "/" + ff.getName());OutputStream is = new FileOutputStream(localFile);ftp.retrieveFile(ff.getName(), is);is.close();}}ftp.logout();result = true;} catch (IOException e) {e.printStackTrace();} finally {if (ftp.isConnected()) {try {ftp.disconnect();} catch (IOException ioe) {}}}return result;}//访问：192.168.116.129/images//01/16/test.jpgpublic void doModifyHead(HttpServletRequest request) {// 转型为MultipartHttpRequest：MultipartFile file = null;System.out.println("上传图片");try {if (request instanceof MultipartHttpServletRequest) {MultipartHttpServletRequest multipartHttpServletRequest = (MultipartHttpServletRequest) request;multipartHttpServletRequest.getFileNames();file = multipartHttpServletRequest.getFile("file");}FileInputStream in=new FileInputStream(new File("C:\\Users\\zxx\\Desktop\\1.jpg"));boolean flag = uploadFile("192.168.116.137", 21, "ftpuser", "ftpuser", "/home/ftpuser/www/images","//01/29", "test6.jpg", in); System.out.println(flag); } catch (FileNotFoundException e) { e.printStackTrace(); } }}

如果觉得《spring boot使用ftp服务器实现图片上传》对你有帮助，请点赞、收藏，并留下你的观点哦！

本内容不代表本网观点和政治立场，如有侵犯你的权益请联系我们处理。

网友评论

网友评论仅供其表达个人看法，并不表明网站立场。