基于SpringBoot + Vue 实现的电影在线售票系统

package com.gouyan.common.file; import com.gouyan.common.utils.StringUtil; import com.gouyan.common.exception.FileNameLengthLimitExceededException; import com.gouyan.common.exception.FileSizeLimitExceededException; import com.gouyan.common.exception.InvalidExtensionException; import org.apache.commons.io.FilenameUtils; import org.apache.commons.lang3.StringUtils; import org.apache.commons.lang3.time.DateFormatUtils; import org.springframework.util.ClassUtils; import org.springframework.web.multipart.MultipartFile; import java.io.File; import java.io.IOException; import java.util.Date; import java.util.UUID; /** * 文件上传工具类 */ public class FileUploadUtils { /** * 默认大小 50M */ public static final long DEFAULT_MAX_SIZE = 50 * 1024 * 1024; /** * 默认的文件名最大长度 100 */ public static final int DEFAULT_FILE_NAME_LENGTH = 100; /** * 默认存储图片目录 */ private static final String parentPath = ClassUtils.getDefaultClassLoader().getResource("static/images").getPath(); public static final String actorPath = "/actor"; public static final String cinemaPath = "/cinema"; public static final String moviePath = "/movie"; public static final String userPath = "/user"; /** * 默认上传的地址 */ private static String defaultBaseDir = userPath; public static void setDefaultBaseDir(String defaultBaseDir) { FileUploadUtils.defaultBaseDir = defaultBaseDir; } public static String getDefaultBaseDir() { return defaultBaseDir; } public static String getParentPath() { return parentPath; } /** * 以默认配置进行文件上传 * * @param file 上传的文件 * @return 文件名称 * @throws Exception */ public static final String upload(MultipartFile file) throws IOException { try { return upload(getParentPath() + getDefaultBaseDir(), file, MimeTypeUtils.DEFAULT_ALLOWED_EXTENSION); } catch (Exception e) { throw new IOException(e.getMessage(), e); } } /** * 文件上传 * * @param baseDir 相对应用的基目录 * @param file 上传的文件 * @param allowedExtension 上传文件类型 * @return 返回上传成功的文件名 * @throws FileSizeLimitExceededException 如果超出最大大小 * @throws FileNameLengthLimitExceededException 文件名太长 * @throws IOException 比如读写文件出错时 * @throws InvalidExtensionException 文件校验异常 */ public static final String upload(String baseDir, MultipartFile file, String[] allowedExtension) throws FileSizeLimitExceededException, IOException, FileNameLengthLimitExceededException, InvalidExtensionException { int fileNamelength = file.getOriginalFilename().length(); if (fileNamelength > FileUploadUtils.DEFAULT_FILE_NAME_LENGTH) { throw new FileNameLengthLimitExceededException("文件名称长度不能超过" + FileUploadUtils.DEFAULT_FILE_NAME_LENGTH); } assertAllowed(file, allowedExtension); String fileName = extractFilename(file); File desc = getAbsoluteFile(baseDir, fileName); file.transferTo(desc); String pathFileName = getPathFileName(baseDir, fileName); return pathFileName; } /** * 编码文件名 如 : images/user/2020/12/4/***.png */ public static final String extractFilename(MultipartFile file) { String fileName = file.getOriginalFilename(); String extension = getExtension(file); fileName = DateFormatUtils.format(new Date(), "yyyy/MM/dd") + "/" + UUID.randomUUID().toString().replaceAll("-","") + "." + extension; return fileName; } private static final File getAbsoluteFile(String uploadDir, String fileName) throws IOException { File desc = new File(uploadDir + File.separator + fileName); if (!desc.getParentFile().exists()) { desc.getParentFile().mkdirs(); } if (!desc.exists()) { desc.createNewFile(); } return desc; } private static final String getPathFileName(String uploadDir, String fileName) throws IOException { int dirLastIndex = parentPath.length() + 1; String currentDir = StringUtils.substring(uploadDir, dirLastIndex); String pathFileName = "/images/" + currentDir + "/" + fileName; return pathFileName; } /** * 文件大小校验 * * @param file 上传的文件 * @return * @throws FileSizeLimitExceededException 如果超出最大大小 * @throws InvalidExtensionException */ public static final void assertAllowed(MultipartFile file, String[] allowedExtension) throws FileSizeLimitExceededException, InvalidExtensionException { long size = file.getSize(); if (DEFAULT_MAX_SIZE != -1 && size > DEFAULT_MAX_SIZE) { throw new FileSizeLimitExceededException("文件大小不能超过" + DEFAULT_MAX_SIZE / 1024 / 1024 + "MB"); } String fileName = file.getOriginalFilename(); String extension = getExtension(file); if (allowedExtension != null && !isAllowedExtension(extension, allowedExtension)) { if (allowedExtension == MimeTypeUtils.IMAGE_EXTENSION) { throw new InvalidExtensionException("图片格式不支持" + extension + "格式"); } } } /** * 判断MIME类型是否是允许的MIME类型 * * @param extension * @param allowedExtension * @return */ public static final boolean isAllowedExtension(String extension, String[] allowedExtension) { for (String str : allowedExtension) { if (str.equalsIgnoreCase(extension)) { return true; } } return false; } /** * 获取文件名的后缀 * * @param file 表单文件 * @return 后缀名 */ public static final String getExtension(MultipartFile file) { String extension = FilenameUtils.getExtension(file.getOriginalFilename()); if (!StringUtil.isNotEmpty(extension)) { extension = MimeTypeUtils.getExtension(file.getContentType()); } return extension; } /** * 删除文件 * * @param filePath 文件 * @return */ public static boolean deleteFile(String filePath) { boolean flag = false; File file = new File(filePath); // 路径为文件且不为空则进行删除 if (file.isFile() && file.exists()) { file.delete(); flag = true; } return flag; } }