文件工具类
package com.ruoyi.common.utils.file;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.OutputStream;
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import javax.servlet.http.HttpServletRequest;
/**
* 文件处理工具类
*
* @author ruoyi
*/
public class FileUtils
{
public static String FILENAME_PATTERN = "[a-zA-Z0-9_\\-\\|\\.\\u4e00-\\u9fa5]+";
/**
* 输出指定文件的byte数组
*
* @param filePath 文件路径
* @param os 输出流
* @return
*/
public static void writeBytes(String filePath, OutputStream os) throws IOException
{
FileInputStream fis = null;
try
{
File file = new File(filePath);
if (!file.exists())
{
throw new FileNotFoundException(filePath);
}
fis = new FileInputStream(file);
byte[] b = new byte[1024];
int length;
while ((length = fis.read(b)) > 0)
{
os.write(b, 0, length);
}
}
catch (IOException e)
{
throw e;
}
finally
{
if (os != null)
{
try
{
os.close();
}
catch (IOException e1)
{
e1.printStackTrace();
}
}
if (fis != null)
{
try
{
fis.close();
}
catch (IOException e1)
{
e1.printStackTrace();
}
}
}
}
/**
* 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;
}
/**
* 文件名称验证
*
* @param filename 文件名称
* @return true 正常 false 非法
*/
public static boolean isValidFilename(String filename)
{
return filename.matches(FILENAME_PATTERN);
}
/**
* 下载文件名重新编码
*
* @param request 请求对象
* @param fileName 文件名
* @return 编码后的文件名
*/
public static String setFileDownloadHeader(HttpServletRequest request, String fileName)
throws UnsupportedEncodingException
{
final String agent = request.getHeader("USER-AGENT");
String filename = fileName;
if (agent.contains("MSIE"))
{
// IE浏览器
filename = URLEncoder.encode(filename, "utf-8");
filename = filename.replace("+", " ");
}
else if (agent.contains("Firefox"))
{
// 火狐浏览器
filename = new String(fileName.getBytes(), "ISO8859-1");
}
else if (agent.contains("Chrome"))
{
// google浏览器
filename = URLEncoder.encode(filename, "utf-8");
}
else
{
// 其它浏览器
filename = URLEncoder.encode(filename, "utf-8");
}
return filename;
}
}
文件上传工具类
package com.ruoyi.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.ruoyi.common.config.Global;
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 com.ruoyi.common.utils.security.Md5Utils;
/**
* 文件上传工具类
*
* @author ruoyi
*/
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 = Global.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);
return fileName;
}
/**
* 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;
}
/**
* 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;
}
}