本文主要是介绍文件上传方式三（若伊版本），希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！
1.准备配置类
package com.ruoyi.screen.core;public class MimeTypeUtils
{public static final String IMAGE_PNG = "image/png";public static final String IMAGE_JPG = "image/jpg";public static final String IMAGE_JPEG = "image/jpeg";public static final String IMAGE_BMP = "image/bmp";public static final String IMAGE_GIF = "image/gif";public static final String[] IMAGE_EXTENSION = { "bmp", "gif", "jpg", "jpeg", "png" };public static final String[] FLASH_EXTENSION = { "swf", "flv" };public static final String[] MEDIA_EXTENSION = { "swf", "flv", "mp3", "wav", "wma", "wmv", "mid", "avi", "mpg","asf", "rm", "rmvb" };public static final String[] VIDEO_EXTENSION = { "mp4", "avi", "rmvb" };public static final String[] DEFAULT_ALLOWED_EXTENSION = {// 图片"bmp", "gif", "jpg", "jpeg", "png",// word excel powerpoint"doc", "docx", "xls", "xlsx", "ppt", "pptx", "html", "htm", "txt",// 压缩文件"rar", "zip", "gz", "bz2",// 视频格式"mp4", "avi", "rmvb",// pdf"pdf" };public static String getExtension(String prefix){switch (prefix){case IMAGE_PNG:return "png";case IMAGE_JPG:return "jpg";case IMAGE_JPEG:return "jpeg";case IMAGE_BMP:return "bmp";case IMAGE_GIF:return "gif";default:return "";}}
}2工具类配置
1.获取上传文件后的url配置
@Component
public class ServerConfig
{/*** 获取完整的请求路径，包括：域名，端口，上下文访问路径* * @return 服务地址*/public String getUrl(){HttpServletRequest request = ServletUtils.getRequest();return getDomain(request);}public static String getDomain(HttpServletRequest request){StringBuffer url = request.getRequestURL();String contextPath = request.getServletContext().getContextPath();return url.delete(url.length() - request.getRequestURI().length(), url.length()).append(contextPath).toString();}
}2.service配置
//
// Source code recreated from a .class file by IntelliJ IDEA
// (powered by FernFlower decompiler)
//package com.ruoyi.screen.core;import com.ruoyi.common.config.RuoYiConfig;
import com.ruoyi.common.exception.file.FileNameLengthLimitExceededException;
import com.ruoyi.common.exception.file.FileSizeLimitExceededException;
import com.ruoyi.common.exception.file.InvalidExtensionException;
import com.ruoyi.common.utils.DateUtils;
import com.ruoyi.common.utils.StringUtils;
import java.io.File;
import java.io.IOException;
import java.nio.charset.StandardCharsets;
import java.nio.file.Paths;
import java.security.spec.KeySpec;
import java.util.Base64;
import java.util.Objects;
import javax.crypto.Cipher;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.PBEKeySpec;
import javax.crypto.spec.SecretKeySpec;
import org.apache.commons.io.FilenameUtils;
import org.springframework.web.multipart.MultipartFile;public class FileUploadUtils {public static final long DEFAULT_MAX_SIZE = 52428800L;public static final int DEFAULT_FILE_NAME_LENGTH = 100;private static String defaultBaseDir = RuoYiConfig.getProfile();private static final String SECRET_KEY = "MySecretKey1234";public FileUploadUtils() {}public static void setDefaultBaseDir(String defaultBaseDir) {FileUploadUtils.defaultBaseDir = defaultBaseDir;}public static String getDefaultBaseDir() {return defaultBaseDir;}private static SecretKey generateSecretKey() throws Exception {KeySpec keySpec = new PBEKeySpec("MySecretKey1234".toCharArray(), "MySecretKey1234".getBytes(), 128, 256);SecretKeyFactory secretKeyFactory = SecretKeyFactory.getInstance("PBKDF2WithHmacSHA256");byte[] secretKeyBytes = secretKeyFactory.generateSecret(keySpec).getEncoded();return new SecretKeySpec(secretKeyBytes, "AES");}public static final String upload(MultipartFile file) throws IOException {try {return upload(getDefaultBaseDir(), file, MimeTypeUtils.DEFAULT_ALLOWED_EXTENSION);} catch (Exception var2) {throw new IOException(var2.getMessage(), var2);}}public static final String upload(String baseDir, MultipartFile file) throws IOException {try {return upload(baseDir, file, MimeTypeUtils.DEFAULT_ALLOWED_EXTENSION);} catch (Exception var3) {throw new IOException(var3.getMessage(), var3);}}public static final String upload(String baseDir, MultipartFile file, String[] allowedExtension) throws Exception {int fileNamelength = ((String)Objects.requireNonNull(file.getOriginalFilename())).length();if (fileNamelength > 100) {throw new FileNameLengthLimitExceededException(100);} else {assertAllowed(file, allowedExtension);String fileName = extractFilename(file);//String fileName = "shebei.xlsx";String absPath = getAbsoluteFile(baseDir, fileName).getAbsolutePath();file.transferTo(Paths.get(absPath));return getPathFileName(baseDir, fileName);}}public static final String extractFilename(MultipartFile file) throws Exception {String uniqueIdentifier = generateUniqueIdentifier();return StringUtils.format("{}/{}_{}", new Object[]{DateUtils.datePath(), encodeBase64Url(file.getOriginalFilename()), uniqueIdentifier});}private static String generateUniqueIdentifier() {return String.valueOf(System.currentTimeMillis());}public static String encodeBase64Url(String input) {byte[] encodedBytes = Base64.getUrlEncoder().encode(input.getBytes(StandardCharsets.UTF_8));return new String(encodedBytes, StandardCharsets.UTF_8);}public static String decodeBase64Url(String input) {byte[] decodedBytes = Base64.getUrlDecoder().decode(input.getBytes(StandardCharsets.UTF_8));return new String(decodedBytes, StandardCharsets.UTF_8);}public static String encryptFileName(String fileName) throws Exception {SecretKey secretKey = generateSecretKey();Cipher cipher = Cipher.getInstance("AES");cipher.init(1, secretKey);byte[] encryptedBytes = cipher.doFinal(fileName.getBytes());return Base64.getEncoder().encodeToString(encryptedBytes);}public static String decryptFileName(String encryptedFileName) throws Exception {SecretKey secretKey = generateSecretKey();Cipher cipher = Cipher.getInstance("AES");cipher.init(2, secretKey);byte[] decodedBytes = Base64.getDecoder().decode(encryptedFileName);byte[] decryptedBytes = cipher.doFinal(decodedBytes);return new String(decryptedBytes);}public static final File getAbsoluteFile(String uploadDir, String fileName) throws IOException {File desc = new File(uploadDir + File.separator + fileName);if (!desc.exists() && !desc.getParentFile().exists()) {desc.getParentFile().mkdirs();}return desc;}public static final String getPathFileName(String uploadDir, String fileName) throws IOException {int dirLastIndex = RuoYiConfig.getProfile().length() + 1;String currentDir = StringUtils.substring(uploadDir, dirLastIndex);return "/profile/" + currentDir + "/" + fileName;}public static final void assertAllowed(MultipartFile file, String[] allowedExtension) throws FileSizeLimitExceededException, InvalidExtensionException {long size = file.getSize();if (size > 52428800L) {throw new FileSizeLimitExceededException(50L);} else {String fileName = file.getOriginalFilename();String extension = getExtension(file);if (allowedExtension != null && !isAllowedExtension(extension, allowedExtension)) {if (allowedExtension == MimeTypeUtils.IMAGE_EXTENSION) {throw new InvalidExtensionException.InvalidImageExtensionException(allowedExtension, extension, fileName);} else if (allowedExtension == MimeTypeUtils.FLASH_EXTENSION) {throw new InvalidExtensionException.InvalidFlashExtensionException(allowedExtension, extension, fileName);} else if (allowedExtension == MimeTypeUtils.MEDIA_EXTENSION) {throw new InvalidExtensionException.InvalidMediaExtensionException(allowedExtension, extension, fileName);} else if (allowedExtension == MimeTypeUtils.VIDEO_EXTENSION) {throw new InvalidExtensionException.InvalidVideoExtensionException(allowedExtension, extension, fileName);} else {throw new InvalidExtensionException(allowedExtension, extension, fileName);}}}}public static final boolean isAllowedExtension(String extension, String[] allowedExtension) {String[] var2 = allowedExtension;int var3 = allowedExtension.length;for(int var4 = 0; var4 < var3; ++var4) {String str = var2[var4];if (str.equalsIgnoreCase(extension)) {return true;}}return false;}public static final String getExtension(MultipartFile file) {String extension = FilenameUtils.getExtension(file.getOriginalFilename());if (StringUtils.isEmpty(extension)) {extension = MimeTypeUtils.getExtension((String)Objects.requireNonNull(file.getContentType()));}return extension;}
}
3.调用上传
public String insertKnowledgeDocumentsFiles(List<MultipartFile> file) {try{ // 上传文件路径String filePath =profile+"/xlsx";LoggerHelper.info("文件上传路径:"+profile);// 上传并返回新文件名称if (file != null && !file.isEmpty()) {for (MultipartFile file1 : file) {String fileName = FileUploadUtils.upload(filePath, file1);String url = serverConfig.getUrl() + fileName;String newFileName = FileUtils.getName(fileName) ;String originalFilename = file1.getOriginalFilename() ;System.out.println(fileName);System.out.println(url);System.out.println(newFileName);System.out.println(originalFilename);}}return "ok";}catch (Exception e){LoggerHelper.error(e.getMessage());return "FilesUploadError";}}4.文件下载使用
@GetMapping("/download/resource")public void resourceDownload(String resource, HttpServletRequest request, HttpServletResponse response)throws Exception{try{if (!FileUtils.checkAllowDownload(resource)){throw new Exception(StringUtils.format("资源文件({})非法，不允许下载。 ", resource));}// 本地资源路径String localPath = RuoYiConfig.getProfile();// 数据库资源地址String downloadPath = localPath + StringUtils.substringAfter(resource, Constants.RESOURCE_PREFIX);// 下载名称String downloadName = StringUtils.substringAfterLast(downloadPath, "/");response.setContentType(MediaType.APPLICATION_OCTET_STREAM_VALUE);FileUtils.setAttachmentResponseHeader(response, downloadName);FileUtils.writeBytes(downloadPath, response.getOutputStream());}catch (Exception e){log.error("下载文件失败", e);}}
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