java根據檔案頭判斷檔案格式
阿新 • • 發佈:2019-02-04
public class FileTypeUtil { private final static Map<String, String> FILE_TYPE_MAP = new HashMap<String, String>(); private static Logger log = LoggerFactory.getLogger(FileTypeUtil.class); private FileTypeUtil(){} static{ getAllFileType(); //初始化檔案型別資訊 } private static void getAllFileType(){ 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色點陣圖(bmp) FILE_TYPE_MAP.put("424d8240090000000000", "bmp"); //24位點陣圖(bmp) FILE_TYPE_MAP.put("424d8e1b030000000000", "bmp"); //256色點陣圖(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的檔案頭一樣 FILE_TYPE_MAP.put("d0cf11e0a1b11ae10000", "vsd"); //Visio 繪圖 FILE_TYPE_MAP.put("5374616E64617264204A", "mdb"); //MS Access (mdb) FILE_TYPE_MAP.put("252150532D41646F6265", "ps"); FILE_TYPE_MAP.put("255044462d312e360d25", "pdf"); //Adobe Acrobat (pdf) FILE_TYPE_MAP.put("2e524d46000000120001", "rmvb"); //rmvb/rm相同 FILE_TYPE_MAP.put("464c5601050000000900", "flv"); //flv與f4v相同 FILE_TYPE_MAP.put("00000020667479706973", "mp4"); FILE_TYPE_MAP.put("49443303000000000f76", "mp3"); FILE_TYPE_MAP.put("000001ba210001000180", "mpg"); // FILE_TYPE_MAP.put("3026b2758e66cf11a6d9", "wmv"); //wmv與asf相同 FILE_TYPE_MAP.put("524946464694c9015741", "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");//可執行檔案 FILE_TYPE_MAP.put("3c25402070616765206c", "jsp");//jsp檔案 FILE_TYPE_MAP.put("4d616e69666573742d56", "mf");//MF檔案 FILE_TYPE_MAP.put("3c3f786d6c2076657273", "xml");//xml檔案 FILE_TYPE_MAP.put("efbbbf2f2a0d0a53514c", "sql");//xml檔案 FILE_TYPE_MAP.put("7061636b616765207765", "java");//java檔案 FILE_TYPE_MAP.put("406563686f206f66660d", "bat");//bat檔案 FILE_TYPE_MAP.put("1f8b0800000000000000", "gz");//gz檔案 FILE_TYPE_MAP.put("6c6f67346a2e726f6f74", "properties");//bat檔案 FILE_TYPE_MAP.put("cafebabe0000002e0041", "class");//bat檔案 FILE_TYPE_MAP.put("49545346030000006000", "chm");//bat檔案 FILE_TYPE_MAP.put("04000000010000001300", "mxp");//bat檔案 FILE_TYPE_MAP.put("504b0304140006000800", "docx");//docx檔案 FILE_TYPE_MAP.put("d0cf11e0a1b11ae10000", "wps");//WPS文字wps、表格et、演示dps都是一樣的 FILE_TYPE_MAP.put("6431303a637265617465", "torrent"); FILE_TYPE_MAP.put("494d4b48010100000200", "264"); 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) } /** * 得到上傳檔案的檔案頭 * @param src * @return */ private static String bytesToHexString(byte[] src){ StringBuilder stringBuilder = new StringBuilder(); if(null==src || src.length <= 0){ return null; } for(int i = 0; i < src.length; i++){ int v = src[i] & 0xFF; String hv = Integer.toHexString(v); if(hv.length() < 2){ stringBuilder.append(0); } stringBuilder.append(hv); } return stringBuilder.toString(); } /** * 獲取檔案型別 * @param file * @return */ public static String getFileType(File file){ String res = null; FileInputStream fis = null; try{ fis = new FileInputStream(file); //獲取檔案頭的前六位 byte[] b = new byte[3]; fis.read(b, 0, b.length); String fileCode = bytesToHexString(b); Iterator<String> keyIter = FILE_TYPE_MAP.keySet().iterator(); while(keyIter.hasNext()){ String key = keyIter.next(); //比較前幾位是否相同就可以判斷檔案格式(相同格式檔案檔案頭後面幾位會有所變化) if(key.toLowerCase().startsWith(fileCode.toLowerCase()) || fileCode.toLowerCase().startsWith(key.toLowerCase())){ res = FILE_TYPE_MAP.get(key); break; } } log.info("檔案頭:"+fileCode+"-----檔案型別:"+res); fis.close(); }catch(FileNotFoundException e){ e.printStackTrace(); }catch (IOException e){ e.printStackTrace(); }finally { try { fis.close(); }catch (IOException e) { e.printStackTrace(); } } return res; } }