• SpringMVC上传文件以流方式判断类型附常用类型


      1    //  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
      2 package com.tg.common.other;
      3 
      4 import com.tg.common.tginterface.TG_FileUpload;
      5 import java.io.ByteArrayOutputStream;
      6 import java.io.File;
      7 import java.io.IOException;
      8 import java.io.InputStream;
      9 import java.net.InetAddress;
     10 import java.text.SimpleDateFormat;
     11 import java.util.Date;
     12 import java.util.HashMap;
     13 import java.util.Iterator;
     14 import java.util.Map;
     15 import java.util.Map.Entry;
     16 import javax.servlet.http.HttpServletRequest;
     17 import org.springframework.web.multipart.MultipartFile;
     18 import org.springframework.web.multipart.MultipartHttpServletRequest;
     19 
     20 public class MultipartFileUpLoad  {
     21     public Map<String, String> FILE_TYPE_MAP = new HashMap<String, String>();
     22 
     23     /**
     24      * 封装上传
     25      * 
     26      * @param request
     27      * @param fileName
     28      *            页面表单file元素name
     29      * @param folderName创建的文件夹名
     30      * @param type    判断类型
     31      * @return 本地文件路径
     32      */
     33 
     34     public String transferToFile(HttpServletRequest request, String fileName, String folderName,
     35             FileTypeEnum type) throws Exception {
     36         MultipartHttpServletRequest multipartRequest = (MultipartHttpServletRequest) request;
     37         MultipartFile mfile = multipartRequest.getFile(fileName);
     38 
     39         if (mfile.getSize() == 0) {
     40             throw new Exception("请选择文件!");
     41         }
     42         FILE_TYPE_MAP.clear();
     43         if (type.equals(FileTypeEnum.audio)) {
     44             getAudioFileType();
     45         } else if (type.equals(FileTypeEnum.picture)) {
     46             getPicFileType();
     47         } else if (type.equals(FileTypeEnum.video)) {
     48             getVideoFileType();
     49         }
     50         
     51         InputStream is = mfile.getInputStream();
     52         ByteArrayOutputStream bytestream = new ByteArrayOutputStream();
     53         
     54         for (int i = 0; i < 10; i++) {
     55             int a = is.read();
     56             bytestream.write(a);
     57         }
     58         byte imgdata[]=bytestream.toByteArray();
     59         
     60         
     61         if (getFileTypeByStream(imgdata) == null) {
     62             throw new Exception("不是指定类型文件!");
     63         }
     64         try {
     65             InetAddress addr = InetAddress.getLocalHost(); // 获取本地计算机信息
     66 
     67             File file = new File(request.getSession().getServletContext()
     68                     .getRealPath(
     69                             "/upload/"
     70                                     + addr.getHostName().toString()
     71                                     + folderName
     72                                     + "/"
     73                                     + new SimpleDateFormat("yyyy-MM-dd")
     74                                             .format(new Date()) + "/"
     75                                     + mfile.getOriginalFilename()));
     76             if (!file.exists()) { // 判断文件夹是否存在
     77                 file.mkdirs(); // 不存在则创建
     78             }
     79             mfile.transferTo(file);
     80             System.out.println(file.getPath());
     81             return file.getPath();
     82         } catch (IllegalStateException e) {
     83             e.printStackTrace();
     84         } catch (IOException e) {
     85             e.printStackTrace();
     86         }
     87         return null;
     88     }
     89 
     90     
     91     public String getFileTypeByStream(byte[] b) {
     92         String filetypeHex = String.valueOf(getFileHexString(b));
     93         System.out.println(filetypeHex);
     94         Iterator<Entry<String, String>> entryiterator = FILE_TYPE_MAP
     95                 .entrySet().iterator();
     96         while (entryiterator.hasNext()) {
     97             Entry<String, String> entry = entryiterator.next();
     98             String fileTypeHexValue = entry.getValue().toUpperCase();
     99             if (filetypeHex.toUpperCase().startsWith(fileTypeHexValue)) {
    100                 return entry.getKey();
    101             }
    102         }
    103         return null;
    104     }
    105 
    106     public String getFileHexString(byte[] b) {
    107         StringBuilder stringBuilder = new StringBuilder();
    108         if (b == null || b.length <= 0) {
    109             return null;
    110         }
    111         for (int i = 0; i < b.length; i++) {
    112             int v = b[i] & 0xFF;
    113             String hv = Integer.toHexString(v);
    114             if (hv.length() < 2) {
    115                 stringBuilder.append(0);
    116             }
    117             stringBuilder.append(hv);
    118         }
    119         return stringBuilder.toString();
    120     }
    121 
    122   public void getVideoFileType() {
    123         FILE_TYPE_MAP.put("ram", "2E7261FD"); // Real Audio (ram)
    124         FILE_TYPE_MAP.put("rm", "2E524D46"); // Real Media (rm)
    125         FILE_TYPE_MAP.put("mov", "00000014667479707174"); // Quicktime (mov)
    126         // FILE_TYPE_MAP.put("rmvb", "2e524d46000000120001"); // rmvb
    127         FILE_TYPE_MAP.put("avi", "41564920");
    128         FILE_TYPE_MAP.put("avi", "52494646b440c02b4156");
    129         FILE_TYPE_MAP.put("flv", "464C5601050000000900");
    130         FILE_TYPE_MAP.put("mp4", "00000020667479706d70");
    131         FILE_TYPE_MAP.put("wmv", "3026b2758e66CF11a6d9");
    132         // FILE_TYPE_MAP.put("3gp", "00000014667479703367");
    133         FILE_TYPE_MAP.put("mkv", "1a45dfa3010000000000");
    134     }
    135 
    136     public void getPicFileType() {
    137         FILE_TYPE_MAP.put("jpg", "FFD8FF"); // JPEG (jpg)
    138         FILE_TYPE_MAP.put("png", "89504E47"); // PNG (png)
    139         FILE_TYPE_MAP.put("gif", "47494638"); // GIF (gif)
    140         FILE_TYPE_MAP.put("bmp", "424D"); // Windows Bitmap (bmp)
    141         FILE_TYPE_MAP.put("png", "89504E470D0a1a0a0000"); // PNG (png)
    142         FILE_TYPE_MAP.put("bmp", "424d228c010000000000"); // 16色位图(bmp)
    143         FILE_TYPE_MAP.put("bmp", "424d8240090000000000"); // 24位位图(bmp)
    144         FILE_TYPE_MAP.put("bmp", "424d8e1b030000000000"); // 256色位图(bmp
    145     }
    146 
    147     public void getAudioFileType() {
    148         FILE_TYPE_MAP.put("wav", "57415645"); // Wave (wav)
    149         FILE_TYPE_MAP.put("mid", "4D546864"); // MIDI (mid)
    150         FILE_TYPE_MAP.put("mp3", "49443303000000002176");
    151         FILE_TYPE_MAP.put("wav", "52494646e27807005741");
    152         FILE_TYPE_MAP.put("aac", "fff1508003fffcda004c");
    153         FILE_TYPE_MAP.put("wv", "7776706ba22100000704");
    154         FILE_TYPE_MAP.put("flac", "664c6143800000221200");
    155     }
    156 
    157     public MultipartFileUpLoad(){}
    158 }
     1    FILE_TYPE_MAP.put("ffd8ffe000104a464946", "jpg"); //JPEG (jpg)    
     2         FILE_TYPE_MAP.put("89504e470d0a1a0a0000", "png"); //PNG (png)    
     3         FILE_TYPE_MAP.put("47494638396126026f01", "gif"); //GIF (gif)    
     4         FILE_TYPE_MAP.put("49492a00227105008037", "tif"); //TIFF (tif)    
     5         FILE_TYPE_MAP.put("424d228c010000000000", "bmp"); //16色位图(bmp)    
     6         FILE_TYPE_MAP.put("424d8240090000000000", "bmp"); //24位位图(bmp)    
     7         FILE_TYPE_MAP.put("424d8e1b030000000000", "bmp"); //256色位图(bmp)    
     8         FILE_TYPE_MAP.put("41433130313500000000", "dwg"); //CAD (dwg)    
     9         FILE_TYPE_MAP.put("3c21444f435459504520", "html"); //HTML (html)
    10         FILE_TYPE_MAP.put("3c21646f637479706520", "htm"); //HTM (htm)
    11         FILE_TYPE_MAP.put("48544d4c207b0d0a0942", "css"); //css
    12         FILE_TYPE_MAP.put("696b2e71623d696b2e71", "js"); //js
    13         FILE_TYPE_MAP.put("7b5c727466315c616e73", "rtf"); //Rich Text Format (rtf)    
    14         FILE_TYPE_MAP.put("38425053000100000000", "psd"); //Photoshop (psd)    
    15         FILE_TYPE_MAP.put("46726f6d3a203d3f6762", "eml"); //Email [Outlook Express 6] (eml)      
    16         FILE_TYPE_MAP.put("d0cf11e0a1b11ae10000", "doc"); //MS Excel 注意:word、msi 和 excel的文件头一样    
    17         FILE_TYPE_MAP.put("d0cf11e0a1b11ae10000", "vsd"); //Visio 绘图    
    18         FILE_TYPE_MAP.put("5374616E64617264204A", "mdb"); //MS Access (mdb)      
    19         FILE_TYPE_MAP.put("252150532D41646F6265", "ps");    
    20         FILE_TYPE_MAP.put("255044462d312e350d0a", "pdf"); //AdobeAcrobat (pdf)  
    21         FILE_TYPE_MAP.put("2e524d46000000120001", "rmvb"); //rmvb/rm相同  
    22         FILE_TYPE_MAP.put("464c5601050000000900", "flv"); //flv与f4v相同  
    23         FILE_TYPE_MAP.put("00000020667479706d70", "mp4");
    24         FILE_TYPE_MAP.put("49443303000000002176", "mp3");
    25         FILE_TYPE_MAP.put("000001ba210001000180", "mpg"); //    
    26         FILE_TYPE_MAP.put("3026b2758e66cf11a6d9", "wmv"); //wmv与asf相同    
    27         FILE_TYPE_MAP.put("52494646e27807005741", "wav"); //Wave (wav)  
    28         FILE_TYPE_MAP.put("52494646d07d60074156", "avi");  
    29         FILE_TYPE_MAP.put("4d546864000000060001", "mid"); //MIDI (mid)  
    30         FILE_TYPE_MAP.put("504b0304140000000800", "zip");    
    31         FILE_TYPE_MAP.put("526172211a0700cf9073", "rar");  
    32         FILE_TYPE_MAP.put("235468697320636f6e66", "ini");  
    33         FILE_TYPE_MAP.put("504b03040a0000000000", "jar");
    34         FILE_TYPE_MAP.put("4d5a9000030000000400", "exe");//可执行文件
    35         FILE_TYPE_MAP.put("3c25402070616765206c", "jsp");//jsp文件
    36         FILE_TYPE_MAP.put("4d616e69666573742d56", "mf");//MF文件
    37         FILE_TYPE_MAP.put("3c3f786d6c2076657273", "xml");//xml文件
    38         FILE_TYPE_MAP.put("494e5345525420494e54", "sql");//xml文件
    39         FILE_TYPE_MAP.put("7061636b616765207765", "java");//java文件
    40         FILE_TYPE_MAP.put("406563686f206f66660d", "bat");//bat文件
    41         FILE_TYPE_MAP.put("1f8b0800000000000000", "gz");//gz文件
    42         FILE_TYPE_MAP.put("6c6f67346a2e726f6f74", "properties");//bat文件
    43         FILE_TYPE_MAP.put("cafebabe0000002e0041", "class");//bat文件
    44         FILE_TYPE_MAP.put("49545346030000006000", "chm");//bat文件
    45         FILE_TYPE_MAP.put("04000000010000001300", "mxp");//bat文件
    46         FILE_TYPE_MAP.put("504b0304140006000800", "docx");//docx文件
    47         FILE_TYPE_MAP.put("d0cf11e0a1b11ae10000", "wps");//WPS文字wps、表格et、演示dps都是一样的
    48         FILE_TYPE_MAP.put("6431303a637265617465", "torrent");
    49         
    50           
    51         FILE_TYPE_MAP.put("6D6F6F76", "mov"); //Quicktime (mov)  
    52         FILE_TYPE_MAP.put("FF575043", "wpd"); //WordPerfect (wpd)  
    53         FILE_TYPE_MAP.put("CFAD12FEC5FD746F", "dbx"); //Outlook Express (dbx)    
    54         FILE_TYPE_MAP.put("2142444E", "pst"); //Outlook (pst)      
    55         FILE_TYPE_MAP.put("AC9EBD8F", "qdf"); //Quicken (qdf)    
    56         FILE_TYPE_MAP.put("E3828596", "pwl"); //Windows Password (pwl)        
    57         FILE_TYPE_MAP.put("2E7261FD", "ram"); //Real Audio (ram)    
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  • 原文地址:https://www.cnblogs.com/lr393993507/p/5310077.html
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