根据文档头判断文档后缀并修改

文档头判断文档后缀并修改"/>

根据文档头判断文档后缀并修改

文档后缀名识别

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;public class VerifyFileTypeUtils {public final static Map<String, String> FILE_TYPE_MAP = new HashMap<String, String>();private static FileInputStream is;static {getAllFileType(); // 初始化文件类型信息}/*** 常用文件格式*/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("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)FILE_TYPE_MAP.put("null", null); // null}/*** 得到上传文件的文件头** @param src* @return*/public static String bytesToHexString(byte[] src) {StringBuilder stringBuilder = new StringBuilder();if (src == null || 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();}/*** 根据制定文件的文件头判断其文件类型** @param* @return*/public static String getFileType(InputStream is) {String res = null;try {byte[] b = new byte[10];is.read(b, 0, b.length);String fileCode = bytesToHexString(b);Iterator<String> keyIter = FILE_TYPE_MAP.keySet().iterator();while (keyIter.hasNext()) {String key = keyIter.next();// 验证前5个字符比较if (key.toLowerCase().startsWith(fileCode.toLowerCase().substring(0, 5))|| fileCode.toLowerCase().substring(0, 5).startsWith(key.toLowerCase())) {res = FILE_TYPE_MAP.get(key);break;}}} catch (FileNotFoundException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();}return res;}

文档复制工具类

public static void copy(InputStream in, String outPath) {filMkdirs(new String[]{outPath});try (FileOutputStream tempOut = new FileOutputStream(outPath)) {Assert.notNull(in, "No InputStream specified");Assert.notNull(tempOut, "No OutputStream specified");StreamUtils.copy(in, tempOut);} catch (Exception e) {log.warn("文件本地拷贝失败  拷贝路径：{}", outPath);throw new BizRuntimeException("999", "服务器文件系统拷贝文件失败");}
}

文档后缀名修改

public static void main(String[] args) throws Exception{/上传文档地址MultipartFile file =“”;String fileType = VerifyFileTypeUtils.getFileType(file.getInputStream());InputStream is = file.getInputStream();File temp = new File("tmp/" + UUID.randomUUID() + FileUtils.separator +FileUtils.getNameNotSuffix(file.getName())+ "." + fileType);FileUtils.copy(is, temp.getPath());}