156 lines
4.6 KiB
Java
156 lines
4.6 KiB
Java
package com.ruoyi.common.utils;
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import java.io.File;
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import java.io.IOException;
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import org.apache.shiro.crypto.hash.Md5Hash;
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import org.apache.tomcat.util.http.fileupload.FileUploadBase.FileSizeLimitExceededException;
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import org.springframework.web.multipart.MultipartFile;
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import com.ruoyi.common.exception.file.FileNameLengthLimitExceededException;
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import com.ruoyi.framework.config.RuoYiConfig;
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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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// 默认大小 50M
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public static final long DEFAULT_MAX_SIZE = 52428800;
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// 默认上传的地址
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private static String defaultBaseDir = RuoYiConfig.getProfile();
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// 默认的文件名最大长度
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public static final int DEFAULT_FILE_NAME_LENGTH = 200;
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// 默认文件类型jpg
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public static final String IMAGE_JPG_EXTENSION = ".jpg";
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private static int counter = 0;
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public static void setDefaultBaseDir(String defaultBaseDir)
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{
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FileUploadUtils.defaultBaseDir = defaultBaseDir;
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}
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public static String getDefaultBaseDir()
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{
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return defaultBaseDir;
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}
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/**
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* 以默认配置进行文件上传
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*
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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 Exception
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*/
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public static final String upload(MultipartFile file) throws IOException
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{
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try
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{
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return upload(getDefaultBaseDir(), file, FileUploadUtils.IMAGE_JPG_EXTENSION);
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}
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catch (Exception e)
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{
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throw new IOException(e);
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}
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}
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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, FileUploadUtils.IMAGE_JPG_EXTENSION);
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}
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catch (Exception e)
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{
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throw new IOException(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 needDatePathAndRandomName 是否需要日期目录和随机文件名前缀
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* @param extension 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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*/
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public static final String upload(String baseDir, MultipartFile file, String extension)
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throws FileSizeLimitExceededException, IOException, FileNameLengthLimitExceededException
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{
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int fileNamelength = 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(file.getOriginalFilename(), fileNamelength,
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FileUploadUtils.DEFAULT_FILE_NAME_LENGTH);
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}
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assertAllowed(file);
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String fileName = encodingFilename(file.getOriginalFilename(), extension);
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File desc = getAbsoluteFile(baseDir, baseDir + fileName);
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file.transferTo(desc);
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return fileName;
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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(File.separator + filename);
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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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if (!desc.exists())
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{
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desc.createNewFile();
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}
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return desc;
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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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private static final String encodingFilename(String filename, String extension)
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{
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filename = filename.replace("_", " ");
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filename = new Md5Hash(filename + System.nanoTime() + counter++).toHex().toString() + extension;
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return filename;
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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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* @return
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* @throws FileSizeLimitExceededException 如果超出最大大小
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*/
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public static final void assertAllowed(MultipartFile file) throws FileSizeLimitExceededException
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{
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long size = file.getSize();
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if (DEFAULT_MAX_SIZE != -1 && size > DEFAULT_MAX_SIZE)
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{
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throw new FileSizeLimitExceededException("not allowed upload upload", size, DEFAULT_MAX_SIZE);
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}
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}
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}
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