FileUploadUtils.java
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package com.huaheng.common.utils.file;
import com.huaheng.common.exception.file.FileNameLengthLimitExceededException;
import com.huaheng.framework.config.HuaHengConfig;
import org.apache.commons.fileupload.FileUploadBase;
import org.apache.shiro.crypto.hash.Md5Hash;
import org.springframework.web.multipart.MultipartFile;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
/**
* 文件上传工具类
*
* @author huaheng
*/
public class FileUploadUtils
{
/**
* 默认大小 50M
*/
public static final long DEFAULT_MAX_SIZE = 52428800;
/**
* 默认上传的地址
*/
private static String defaultBaseDir = HuaHengConfig.getProfile();
/**
* 默认的文件名最大长度
*/
public static final int DEFAULT_FILE_NAME_LENGTH = 200;
/**
* 默认文件类型jpg
*/
public static final String IMAGE_JPG_EXTENSION = ".jpg";
/**
* 图片类型png
*/
public static final String IMAGE_PNG_EXTENSION = ".png";
/**
* 图片类型ico
*/
public static final String IMAGE_ICO_EXTENSION = ".ico";
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, FileUploadUtils.IMAGE_JPG_EXTENSION);
}
catch (Exception e)
{
throw new IOException(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, FileUploadUtils.IMAGE_JPG_EXTENSION);
}
catch (Exception e)
{
throw new IOException(e);
}
}
/**
* 文件上传
*
* @param baseDir 相对应用的基目录
* @param file 上传的文件
* @param needDatePathAndRandomName 是否需要日期目录和随机文件名前缀
* @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
*/
public static final String upload(String baseDir, MultipartFile file, String extension)
throws FileUploadBase.FileSizeLimitExceededException, IOException, FileNameLengthLimitExceededException
{
int fileNamelength = file.getOriginalFilename().length();
if (fileNamelength > FileUploadUtils.DEFAULT_FILE_NAME_LENGTH)
{
throw new FileNameLengthLimitExceededException(file.getOriginalFilename(), fileNamelength,
FileUploadUtils.DEFAULT_FILE_NAME_LENGTH);
}
assertAllowed(file);
String fileName = encodingFilename(file.getOriginalFilename(), extension);
File desc = getAbsoluteFile(baseDir, baseDir + fileName);
file.transferTo(desc);
return fileName;
}
private static final File getAbsoluteFile(String uploadDir, String filename) throws IOException
{
File desc = new File(File.separator + filename);
if (!desc.getParentFile().exists())
{
desc.getParentFile().mkdirs();
}
if (!desc.exists())
{
// desc.createNewFile();
}
return desc;
}
public static final String upload(String baseDir, MultipartFile file, int log)
throws FileUploadBase.FileSizeLimitExceededException, IOException, FileNameLengthLimitExceededException
{
int fileNamelength = file.getOriginalFilename().length();
if (fileNamelength > FileUploadUtils.DEFAULT_FILE_NAME_LENGTH)
{
throw new FileNameLengthLimitExceededException(file.getOriginalFilename(), fileNamelength,
FileUploadUtils.DEFAULT_FILE_NAME_LENGTH);
}
assertAllowed(file);
String fileName = file.getOriginalFilename();
File desc = getAbsoluteFile(baseDir, baseDir + fileName);
file.transferTo(desc);
return fileName;
}
/**
* 编码文件名
*/
private static final String encodingFilename(String filename, String extension)
{
filename = filename.replace("_", " ");
filename = new Md5Hash(filename + System.nanoTime() + counter++).toHex().toString() + extension;
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
*/
public static final void assertAllowed(MultipartFile file) throws FileUploadBase.FileSizeLimitExceededException
{
long size = file.getSize();
if (DEFAULT_MAX_SIZE != -1 && size > DEFAULT_MAX_SIZE)
{
throw new FileUploadBase.FileSizeLimitExceededException("not allowed upload upload", size, DEFAULT_MAX_SIZE);
}
}
/**
* 公司logo，icon图片上传路径
* @return
* @throws FileNotFoundException
*/
public static String getCorporationUploadPath() throws FileNotFoundException {
//上传到resource/static/corporation目录下,jar包布署时无法实现
// String path = ResourceUtils.getURL("classpath:").getPath()+"static/";
//上传到huangheng.profile配置的目录下
String path = getDefaultBaseDir();
return path;
}
}