package com.gopro.crmgp.common.utils.file;
import java.io.File;
import java.io.IOException;
import org.apache.commons.io.FilenameUtils;
import org.springframework.web.multipart.MultipartFile;
import com.gopro.crmgp.common.constant.Constants;
import com.gopro.crmgp.common.exception.file.FileNameLengthLimitExceededException;
import com.gopro.crmgp.common.exception.file.FileSizeLimitExceededException;
import com.gopro.crmgp.common.exception.file.InvalidExtensionException;
import com.gopro.crmgp.common.utils.DateUtils;
import com.gopro.crmgp.common.utils.Md5Utils;
import com.gopro.crmgp.common.utils.StringUtils;
import com.gopro.crmgp.framework.config.RuoYiConfig;
/**
* 文件上传工具类
*
* @author Arturia.P
*/
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;
/**
* 默认上传的地址
*/
private static String defaultBaseDir =RuoYiConfig.getProfile();
private static int counter =0;
public static void setDefaultBaseDir(String defaultBaseDir)
{
FileUploadUtils.defaultBaseDir = defaultBaseDir;
}
public static String getDefaultBaseDir()
{
return defaultBaseDir;
}
/**
* 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(getDefaultBaseDir(), file,MimeTypeUtils.DEFAULT_ALLOWED_EXTENSION);
}
catch (Exception e)
{
throw new IOException(e.getMessage(), e);
}
}
/**
* 根据文件路径上传
*
* @param baseDir 相对应用的基目录
* @param file 上传的文件
* @return 文件名称
* @throws IOException
*/
public static final String upload(String baseDir,MultipartFile file)throws IOException
{
try
{
return upload(baseDir, 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 extension 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(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
*/
public static final String extractFilename(MultipartFile file)
{
String fileName = file.getOriginalFilename();
String extension =getExtension(file);
fileName =DateUtils.datePath() +"/" +encodingFilename(fileName) +"." +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 =RuoYiConfig.getProfile().length() +1;
String currentDir =StringUtils.substring(uploadDir,dirLastIndex);
String pathFileName =Constants.RESOURCE_PREFIX +"/" +currentDir +"/" + fileName;
return pathFileName;
}
/**
* 编码文件名
*/
private static final String encodingFilename(String fileName)
{
fileName = fileName.replace("_"," ");
fileName =Md5Utils.hash(fileName +System.nanoTime() +counter++);
return fileName;
}
/**
* 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(DEFAULT_MAX_SIZE /1024 /1024);
}
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
{
throw new InvalidExtensionException(allowedExtension,extension,fileName);
}
}
}
/**
* 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 (StringUtils.isEmpty(extension))
{
extension =MimeTypeUtils.getExtension(file.getContentType());
}
return extension;
}
}