SpringMVC上传文件以流方式判断类型附常用类型

此类中判断类型所截取的byte 长度暂不确定，请使用者测试过使用

package com.tg.common.other;

import com.tg.common.tginterface.TG_FileUpload;

import java.io.ByteArrayOutputStream;

import java.io.File;

import java.io.IOException;

import java.io.InputStream;

import java.net.InetAddress;

import java.text.SimpleDateFormat;

import java.util.Date;

import java.util.HashMap;

import java.util.Iterator;

import java.util.Map;

import java.util.Map.Entry;

import javax.servlet.http.HttpServletRequest;

import org.springframework.web.multipart.MultipartFile;

import org.springframework.web.multipart.MultipartHttpServletRequest;

public class MultipartFileUpLoad {

public Map<String, String> FILE_TYPE_MAP = new HashMap<String, String>();

/**

* 封装上传

*

* @param request

* @param fileName

* 页面表单file元素name

* @param folderName创建的文件夹名

* @param type 判断类型

* @return 本地文件路径

*/

public String transferToFile(HttpServletRequest request, String fileName, String folderName,

FileTypeEnum type) throws Exception {

MultipartHttpServletRequest multipartRequest = (MultipartHttpServletRequest) request;

MultipartFile mfile = multipartRequest.getFile(fileName);

if (mfile.getSize() == 0) {

throw new Exception("请选择文件！");

}

FILE_TYPE_MAP.clear();

if (type.equals(FileTypeEnum.audio)) {

getAudioFileType();

} else if (type.equals(FileTypeEnum.picture)) {

getPicFileType();

} else if (type.equals(FileTypeEnum.video)) {

getVideoFileType();

}

InputStream is = mfile.getInputStream();

ByteArrayOutputStream bytestream = new ByteArrayOutputStream();

for (int i = 0; i < 10; i++) {

int a = is.read();

bytestream.write(a);

}

byte imgdata[]=bytestream.toByteArray();

if (getFileTypeByStream(imgdata) == null) {

throw new Exception("不是指定类型文件！");

}

try {

InetAddress addr = InetAddress.getLocalHost(); // 获取本地计算机信息

File file = new File(request.getSession().getServletContext()

.getRealPath(

"/upload/"

+ addr.getHostName().toString()

+ folderName

+ "/"

+ new SimpleDateFormat("yyyy-MM-dd")

.format(new Date()) + "/"

+ mfile.getOriginalFilename()));

if (!file.exists()) { // 判断文件夹是否存在

file.mkdirs(); // 不存在则创建

}

mfile.transferTo(file);

System.out.println(file.getPath());

return file.getPath();

} catch (IllegalStateException e) {

e.printStackTrace();

} catch (IOException e) {

e.printStackTrace();

}

return null;

}

public String getFileTypeByStream(byte[] b) {

String filetypeHex = String.valueOf(getFileHexString(b));

System.out.println(filetypeHex);

Iterator<Entry<String, String>> entryiterator = FILE_TYPE_MAP

.entrySet().iterator();

while (entryiterator.hasNext()) {

Entry<String, String> entry = entryiterator.next();

String fileTypeHexValue = entry.getValue().toUpperCase();

if (filetypeHex.toUpperCase().startsWith(fileTypeHexValue)) {

return entry.getKey();

}

}

return null;

}

public String getFileHexString(byte[] b) {

StringBuilder stringBuilder = new StringBuilder();

if (b == null || b.length <= 0) {

return null;

}

for (int i = 0; i < b.length; i++) {

int v = b[i] & 0xFF;

String hv = Integer.toHexString(v);

if (hv.length() < 2) {

stringBuilder.append(0);

}

stringBuilder.append(hv);

}

return stringBuilder.toString();

}

public void getVideoFileType() {

FILE_TYPE_MAP.put("ram", "2E7261FD"); // Real Audio (ram)

FILE_TYPE_MAP.put("rm", "2E524D46"); // Real Media (rm)

FILE_TYPE_MAP.put("mov", "00000014667479707174"); // Quicktime (mov)

// FILE_TYPE_MAP.put("rmvb", "2e524d46000000120001"); // rmvb

FILE_TYPE_MAP.put("avi", "41564920");

FILE_TYPE_MAP.put("avi", "52494646b440c02b4156");

FILE_TYPE_MAP.put("flv", "464C5601050000000900");

FILE_TYPE_MAP.put("mp4", "00000020667479706d70");

FILE_TYPE_MAP.put("wmv", "3026b2758e66CF11a6d9");

// FILE_TYPE_MAP.put("3gp", "00000014667479703367");

FILE_TYPE_MAP.put("mkv", "1a45dfa3010000000000");

}

public void getPicFileType() {

FILE_TYPE_MAP.put("jpg", "FFD8FF"); // JPEG (jpg)

FILE_TYPE_MAP.put("png", "89504E47"); // PNG (png)

FILE_TYPE_MAP.put("gif", "47494638"); // GIF (gif)

FILE_TYPE_MAP.put("bmp", "424D"); // Windows Bitmap (bmp)

FILE_TYPE_MAP.put("png", "89504E470D0a1a0a0000"); // PNG (png)

FILE_TYPE_MAP.put("bmp", "424d228c010000000000"); // 16色位图(bmp)

FILE_TYPE_MAP.put("bmp", "424d8240090000000000"); // 24位位图(bmp)

FILE_TYPE_MAP.put("bmp", "424d8e1b030000000000"); // 256色位图(bmp

}

public void getAudioFileType() {

FILE_TYPE_MAP.put("wav", "57415645"); // Wave (wav)

FILE_TYPE_MAP.put("mid", "4D546864"); // MIDI (mid)

FILE_TYPE_MAP.put("mp3", "49443303000000002176");

FILE_TYPE_MAP.put("wav", "52494646e27807005741");

FILE_TYPE_MAP.put("aac", "fff1508003fffcda004c");

FILE_TYPE_MAP.put("wv", "7776706ba22100000704");

FILE_TYPE_MAP.put("flac", "664c6143800000221200");

}

public MultipartFileUpLoad(){}

}

FILE_TYPE_MAP.put("ffd8ffe000104a464946", "jpg"); //JPEG (jpg)

FILE_TYPE_MAP.put("89504e470d0a1a0a0000", "png"); //PNG (png)

FILE_TYPE_MAP.put("47494638396126026f01", "gif"); //GIF (gif)

FILE_TYPE_MAP.put("49492a00227105008037", "tif"); //TIFF (tif)

FILE_TYPE_MAP.put("424d228c010000000000", "bmp"); //16色位图(bmp)

FILE_TYPE_MAP.put("424d8240090000000000", "bmp"); //24位位图(bmp)

FILE_TYPE_MAP.put("424d8e1b030000000000", "bmp"); //256色位图(bmp)

FILE_TYPE_MAP.put("41433130313500000000", "dwg"); //CAD (dwg)

FILE_TYPE_MAP.put("3c21444f435459504520", "html"); //HTML (html)

FILE_TYPE_MAP.put("3c21646f637479706520", "htm"); //HTM (htm)

FILE_TYPE_MAP.put("48544d4c207b0d0a0942", "css"); //css

FILE_TYPE_MAP.put("696b2e71623d696b2e71", "js"); //js

FILE_TYPE_MAP.put("7b5c727466315c616e73", "rtf"); //Rich Text Format (rtf)

FILE_TYPE_MAP.put("38425053000100000000", "psd"); //Photoshop (psd)

FILE_TYPE_MAP.put("46726f6d3a203d3f6762", "eml"); //Email [Outlook Express 6] (eml)

FILE_TYPE_MAP.put("d0cf11e0a1b11ae10000", "doc"); //MS Excel 注意：word、msi 和 excel的文件头一样

FILE_TYPE_MAP.put("d0cf11e0a1b11ae10000", "vsd"); //Visio 绘图

FILE_TYPE_MAP.put("5374616E64617264204A", "mdb"); //MS Access (mdb)

FILE_TYPE_MAP.put("252150532D41646F6265", "ps");

FILE_TYPE_MAP.put("255044462d312e350d0a", "pdf"); //AdobeAcrobat (pdf)

FILE_TYPE_MAP.put("2e524d46000000120001", "rmvb"); //rmvb/rm相同

FILE_TYPE_MAP.put("464c5601050000000900", "flv"); //flv与f4v相同

FILE_TYPE_MAP.put("00000020667479706d70", "mp4");

FILE_TYPE_MAP.put("49443303000000002176", "mp3");

FILE_TYPE_MAP.put("000001ba210001000180", "mpg"); //

FILE_TYPE_MAP.put("3026b2758e66cf11a6d9", "wmv"); //wmv与asf相同

FILE_TYPE_MAP.put("52494646e27807005741", "wav"); //Wave (wav)

FILE_TYPE_MAP.put("52494646d07d60074156", "avi");

FILE_TYPE_MAP.put("4d546864000000060001", "mid"); //MIDI (mid)

FILE_TYPE_MAP.put("504b0304140000000800", "zip");

FILE_TYPE_MAP.put("526172211a0700cf9073", "rar");

FILE_TYPE_MAP.put("235468697320636f6e66", "ini");

FILE_TYPE_MAP.put("504b03040a0000000000", "jar");

FILE_TYPE_MAP.put("4d5a9000030000000400", "exe");//可执行文件

FILE_TYPE_MAP.put("3c25402070616765206c", "jsp");//jsp文件

FILE_TYPE_MAP.put("4d616e69666573742d56", "mf");//MF文件

FILE_TYPE_MAP.put("3c3f786d6c2076657273", "xml");//xml文件

FILE_TYPE_MAP.put("494e5345525420494e54", "sql");//xml文件

FILE_TYPE_MAP.put("7061636b616765207765", "java");//java文件

FILE_TYPE_MAP.put("406563686f206f66660d", "bat");//bat文件

FILE_TYPE_MAP.put("1f8b0800000000000000", "gz");//gz文件

FILE_TYPE_MAP.put("6c6f67346a2e726f6f74", "properties");//bat文件

FILE_TYPE_MAP.put("cafebabe0000002e0041", "class");//bat文件

FILE_TYPE_MAP.put("49545346030000006000", "chm");//bat文件

FILE_TYPE_MAP.put("04000000010000001300", "mxp");//bat文件

FILE_TYPE_MAP.put("504b0304140006000800", "docx");//docx文件

FILE_TYPE_MAP.put("d0cf11e0a1b11ae10000", "wps");//WPS文字wps、表格et、演示dps都是一样的

FILE_TYPE_MAP.put("6431303a637265617465", "torrent");

FILE_TYPE_MAP.put("6D6F6F76", "mov"); //Quicktime (mov)

FILE_TYPE_MAP.put("FF575043", "wpd"); //WordPerfect (wpd)

FILE_TYPE_MAP.put("CFAD12FEC5FD746F", "dbx"); //Outlook Express (dbx)

FILE_TYPE_MAP.put("2142444E", "pst"); //Outlook (pst)

FILE_TYPE_MAP.put("AC9EBD8F", "qdf"); //Quicken (qdf)

FILE_TYPE_MAP.put("E3828596", "pwl"); //Windows Password (pwl)

FILE_TYPE_MAP.put("2E7261FD", "ram"); //Real Audio (ram)