, String>();privateVerifyFileType(){}

static{

getAllFileType();//初始化文件类型信息}

/*** Discription:[getAllFileType,常见文件头信息]*/private static voidgetAllFileType()

{

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");//cssFILE_TYPE_MAP.put("696b2e71623d696b2e71","js");//jsFILE_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");//Adobe Acrobat (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("3c68746d6c20786d6c6e","htm");//猎聘、智联简历。htmFILE_TYPE_MAP.put("46726f6d3a3cd3c920cd","mht");//51job简历。mhtFILE_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)}

/*** 得到上传文件的文件头*@paramsrc*@return*/public staticString bytesToHexString(byte[] src) {

StringBuilder stringBuilder = newStringBuilder();if(src == null|| src.length<= 0) {

return null;}

for(inti = 0;i < src.length;i++) {

intv = src[i] & 0xFF;String hv = Integer.toHexString(v);if(hv.length() < 2) {

stringBuilder.append(0);}

stringBuilder.append(hv);}

returnstringBuilder.toString();}

/*** 根据制定文件的文件头判断其文件类型*@paramfilePaht*@return*/public staticString getFileType(String filePaht){

String res = null;try{

FileInputStream is = newFileInputStream(filePaht);byte[] b = new byte[10];is.read(b,0,b.length);String fileCode = bytesToHexString(b);System.out.println(fileCode);//这种方法在字典的头代码不够位数的时候可以用但是速度相对慢一点IteratorkeyIter = FILE_TYPE_MAP.keySet().iterator();while(keyIter.hasNext()){

String key = keyIter.next();if(key.toLowerCase().startsWith(fileCode.toLowerCase()) || fileCode.toLowerCase().startsWith(key.toLowerCase())){

res = FILE_TYPE_MAP.get(key);break;}

}

} catch(FileNotFoundException e) {

e.printStackTrace();} catch(IOException e) {

e.printStackTrace();}

returnres;}

public static voidmain(String[] args) throwsException {

String type = getFileType("D:/智联招聘_贾峻权_java中级开发..._中文_20160829_65840716.doc");System.out.println("Except : "+type);System.out.println();/* type = getFileType("C:/test/350996.wav");System.out.println("350996.wav : "+type);System.out.println(); */}

}