package com.ruoyi.file.utils;
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import java.io.File;
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import java.io.IOException;
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import java.nio.file.Paths;
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import java.util.Objects;
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import org.apache.commons.io.FilenameUtils;
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import org.springframework.web.multipart.MultipartFile;
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import com.ruoyi.common.core.exception.file.FileException;
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import com.ruoyi.common.core.exception.file.FileNameLengthLimitExceededException;
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import com.ruoyi.common.core.exception.file.FileSizeLimitExceededException;
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import com.ruoyi.common.core.exception.file.InvalidExtensionException;
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import com.ruoyi.common.core.utils.DateUtils;
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import com.ruoyi.common.core.utils.StringUtils;
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import com.ruoyi.common.core.utils.file.FileTypeUtils;
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import com.ruoyi.common.core.utils.file.MimeTypeUtils;
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import com.ruoyi.common.core.utils.uuid.Seq;
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/**
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* 文件上传工具类
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*
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* @author ruoyi
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*/
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public class FileUploadUtils
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{
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/**
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* 默认大小 50M
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*/
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public static final long DEFAULT_MAX_SIZE = 50 * 1024 * 1024;
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/**
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* 默认的文件名最大长度 100
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*/
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public static final int DEFAULT_FILE_NAME_LENGTH = 100;
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/**
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* 根据文件路径上传
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*
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* @param baseDir 相对应用的基目录
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* @param file 上传的文件
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* @return 文件名称
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* @throws IOException
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*/
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public static final String upload(String baseDir, MultipartFile file) throws IOException
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{
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try
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{
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return upload(baseDir, file, MimeTypeUtils.DEFAULT_ALLOWED_EXTENSION);
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}
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catch (FileException fe)
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{
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throw new IOException(fe.getDefaultMessage(), fe);
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}
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catch (Exception e)
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{
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throw new IOException(e.getMessage(), e);
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}
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}
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/**
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* 文件上传
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*
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* @param baseDir 相对应用的基目录
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* @param file 上传的文件
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* @param allowedExtension 上传文件类型
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* @return 返回上传成功的文件名
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* @throws FileSizeLimitExceededException 如果超出最大大小
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* @throws FileNameLengthLimitExceededException 文件名太长
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* @throws IOException 比如读写文件出错时
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* @throws InvalidExtensionException 文件校验异常
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*/
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public static final String upload(String baseDir, MultipartFile file, String[] allowedExtension)
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throws FileSizeLimitExceededException, IOException, FileNameLengthLimitExceededException,
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InvalidExtensionException
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{
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int fileNamelength = Objects.requireNonNull(file.getOriginalFilename()).length();
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if (fileNamelength > FileUploadUtils.DEFAULT_FILE_NAME_LENGTH)
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{
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throw new FileNameLengthLimitExceededException(FileUploadUtils.DEFAULT_FILE_NAME_LENGTH);
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}
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assertAllowed(file, allowedExtension);
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String fileName = extractFilename(file);
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String absPath = getAbsoluteFile(baseDir, fileName).getAbsolutePath();
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file.transferTo(Paths.get(absPath));
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return getPathFileName(fileName);
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}
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/**
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* 编码文件名
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*/
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public static final String extractFilename(MultipartFile file)
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{
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return StringUtils.format("{}/{}_{}.{}", DateUtils.datePath(),
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FilenameUtils.getBaseName(file.getOriginalFilename()), Seq.getId(Seq.uploadSeqType), FileTypeUtils.getExtension(file));
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}
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private static final File getAbsoluteFile(String uploadDir, String fileName) throws IOException
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{
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File desc = new File(uploadDir + File.separator + fileName);
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if (!desc.exists())
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{
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if (!desc.getParentFile().exists())
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{
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desc.getParentFile().mkdirs();
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}
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}
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return desc.isAbsolute() ? desc : desc.getAbsoluteFile();
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}
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private static final String getPathFileName(String fileName) throws IOException
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{
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String pathFileName = "/" + fileName;
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return pathFileName;
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}
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/**
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* 文件大小校验
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*
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* @param file 上传的文件
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* @throws FileSizeLimitExceededException 如果超出最大大小
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* @throws InvalidExtensionException 文件校验异常
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*/
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public static final void assertAllowed(MultipartFile file, String[] allowedExtension)
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throws FileSizeLimitExceededException, InvalidExtensionException
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{
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long size = file.getSize();
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if (size > DEFAULT_MAX_SIZE)
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{
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throw new FileSizeLimitExceededException(DEFAULT_MAX_SIZE / 1024 / 1024);
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}
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String fileName = file.getOriginalFilename();
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String extension = FileTypeUtils.getExtension(file);
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if (allowedExtension != null && !isAllowedExtension(extension, allowedExtension))
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{
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if (allowedExtension == MimeTypeUtils.IMAGE_EXTENSION)
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{
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throw new InvalidExtensionException.InvalidImageExtensionException(allowedExtension, extension,
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fileName);
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}
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else if (allowedExtension == MimeTypeUtils.FLASH_EXTENSION)
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{
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throw new InvalidExtensionException.InvalidFlashExtensionException(allowedExtension, extension,
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fileName);
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}
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else if (allowedExtension == MimeTypeUtils.MEDIA_EXTENSION)
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{
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throw new InvalidExtensionException.InvalidMediaExtensionException(allowedExtension, extension,
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fileName);
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}
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else if (allowedExtension == MimeTypeUtils.VIDEO_EXTENSION)
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{
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throw new InvalidExtensionException.InvalidVideoExtensionException(allowedExtension, extension,
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fileName);
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}
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else
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{
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throw new InvalidExtensionException(allowedExtension, extension, fileName);
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}
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}
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}
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/**
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* 判断MIME类型是否是允许的MIME类型
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*
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* @param extension 上传文件类型
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* @param allowedExtension 允许上传文件类型
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* @return true/false
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*/
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public static final boolean isAllowedExtension(String extension, String[] allowedExtension)
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{
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for (String str : allowedExtension)
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{
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if (str.equalsIgnoreCase(extension))
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{
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return true;
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}
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}
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return false;
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}
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}
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