package com.shove.web.util;
import java.awt.image.BufferedImage;
import java.io.File;
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;
import java.util.Map.Entry;
import javax.imageio.ImageIO;
import javax.imageio.ImageReader;
import javax.imageio.stream.ImageInputStream;
public class VerifyTruePicture {
public final static Map<String, String> FILE_TYPE_MAP = new HashMap<String, String>();
private VerifyTruePicture(){}
static{
getAllFileType(); //初始化文件类型信息
}
/**
* Created on 2010-7-1
* <p>Discription:[getAllFileType,常见文件头信息]</p>
* @author:[shixing_11@sina.com]
*/
private static void getAllFileType()
{
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("tif", "49492A00"); //TIFF (tif)
FILE_TYPE_MAP.put("bmp", "424D"); //Windows Bitmap (bmp)
/*FILE_TYPE_MAP.put("dwg", "41433130"); //CAD (dwg)
FILE_TYPE_MAP.put("html", "68746D6C3E"); //HTML (html)
FILE_TYPE_MAP.put("rtf", "7B5C727466"); //Rich Text Format (rtf)
FILE_TYPE_MAP.put("xml", "3C3F786D6C");
FILE_TYPE_MAP.put("zip", "504B0304");
FILE_TYPE_MAP.put("rar", "52617221");
FILE_TYPE_MAP.put("psd", "38425053"); //Photoshop (psd)
FILE_TYPE_MAP.put("eml", "44656C69766572792D646174653A"); //Email [thorough only] (eml)
FILE_TYPE_MAP.put("dbx", "CFAD12FEC5FD746F"); //Outlook Express (dbx)
FILE_TYPE_MAP.put("pst", "2142444E"); //Outlook (pst)
FILE_TYPE_MAP.put("xls", "D0CF11E0"); //MS Word
FILE_TYPE_MAP.put("doc", "D0CF11E0"); //MS Excel 注意：word 和 excel的文件头一样
FILE_TYPE_MAP.put("mdb", "5374616E64617264204A"); //MS Access (mdb)
FILE_TYPE_MAP.put("wpd", "FF575043"); //WordPerfect (wpd)
FILE_TYPE_MAP.put("eps", "252150532D41646F6265");
FILE_TYPE_MAP.put("ps", "252150532D41646F6265");
FILE_TYPE_MAP.put("pdf", "255044462D312E"); //Adobe Acrobat (pdf)
FILE_TYPE_MAP.put("qdf", "AC9EBD8F"); //Quicken (qdf)
FILE_TYPE_MAP.put("pwl", "E3828596"); //Windows Password (pwl)
FILE_TYPE_MAP.put("wav", "57415645"); //Wave (wav)
FILE_TYPE_MAP.put("avi", "41564920");
FILE_TYPE_MAP.put("ram", "2E7261FD"); //Real Audio (ram)
FILE_TYPE_MAP.put("rm", "2E524D46"); //Real Media (rm)
FILE_TYPE_MAP.put("mpg", "000001BA"); //
FILE_TYPE_MAP.put("mov", "6D6F6F76"); //Quicktime (mov)
FILE_TYPE_MAP.put("asf", "3026B2758E66CF11"); //Windows Media (asf)
FILE_TYPE_MAP.put("mid", "4D546864"); //MIDI (mid)
*/ }
/**
* Created on 2010-7-1
* <p>Discription:[getImageFileType,获取图片文件实际类型,若不是图片则返回null]</p>
* @param File
* @return fileType
* @author:[shixing_11@sina.com]
*/
public final static String getImageFileType(File f)
{
if (isImage(f))
{
try
{
ImageInputStream iis = ImageIO.createImageInputStream(f);
Iterator<ImageReader> iter = ImageIO.getImageReaders(iis);
if (!iter.hasNext())
{
return null;
}
ImageReader reader = iter.next();
iis.close();
return reader.getFormatName();
}
catch (IOException e)
{
return null;
}
catch (Exception e)
{
return null;
}
}
return null;
}
/**
* Created on 2010-7-1
* <p>Discription:[getFileByFile,获取文件类型,包括图片,若格式不是已配置的,则返回null]</p>
* @param file
* @return fileType
* @author:[shixing_11@sina.com]
*/
public final static String getFileByFile(File file)
{
String filetype = null;
byte[] b = new byte[50];
try
{
InputStream is = new FileInputStream(file);
is.read(b);
filetype = getFileTypeByStream(b);
is.close();
}
catch (FileNotFoundException e)
{
e.printStackTrace();
}
catch (IOException e)
{
e.printStackTrace();
}
return filetype;
}
/**
* Created on 2010-7-1
* <p>Discription:[getFileTypeByStream]</p>
* @param b
* @return fileType
* @author:[shixing_11@sina.com]
*/
public final static String getFileTypeByStream(byte[] b)
{
String filetypeHex = String.valueOf(getFileHexString(b));
Iterator<Entry<String, String>> entryiterator = FILE_TYPE_MAP.entrySet().iterator();
while (entryiterator.hasNext()) {
Entry<String,String> entry = entryiterator.next();
String fileTypeHexValue = entry.getValue();
if (filetypeHex.toUpperCase().startsWith(fileTypeHexValue)) {
return entry.getKey();
}
}
return null;
}
/**
* Created on 2010-7-2
* <p>Discription:[isImage,判断文件是否为图片]</p>
* @param file
* @return true 是 | false 否
* @author:[shixing_11@sina.com]
*/
public static final boolean isImage(File file){
boolean flag = false;
try
{
BufferedImage bufreader = ImageIO.read(file);
int width = bufreader.getWidth();
int height = bufreader.getHeight();
if(width==0 || height==0){
flag = false;
}else {
flag = true;
}
}
catch (IOException e)
{
flag = false;
}catch (Exception e) {
flag = false;
}
return flag;
}
/**
* Created on 2010-7-1
* <p>Discription:[getFileHexString]</p>
* @param b
* @return fileTypeHex
* @author:[shixing_11@sina.com]
*/
public final static 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();
}
}