return model;
}
private static byte[] readFromFile(String fileName) throws IOException
{
PicsModel model = null;
FileInputStream fin = new FileInputStream(fileName);
byte [] buf = new byte[fin.available()];
fin.read(buf);
fin.close();
return buf;
}
private static String getFileExtendName(byte[] byte1)
{
String strFileExtendName;
strFileExtendName = null;
//header bytes contains GIF87a or GIF89a?
if ((byte1[0] == 71)&&(byte1[1] == 73)&&(byte1[2] == 70)&&(byte1[3] == 56)&&((byte1[4] == 55)||(byte1[4] == 57))&&(byte1[5] == 97))
{
strFileExtendName = "GIF";
}
//header bytes contains JFIF?
if ((byte1[6] == 74)&&(byte1[7] == 70)&&(byte1[8] == 73)&&(byte1[9] == 70))
{
strFileExtendName = "JPG";
}
//header bytes contains BM?
if ((byte1[0] == 66)&&(byte1[1] == 77))
{
strFileExtendName = "BMP";
}
//header bytes contains PNG?
if ((byte1[1] == 80)&&(byte1[2] == 78)&&(byte1[3] == 71))
{
strFileExtendName = "PNG";
}
return strFileExtendName;
}
private static int getFileAttribute(byte[] byte2,int n,int m,String fileextendname)
{
int j,FileAttributeValue;
j = 0;
FileAttributeValue = 0;
String str,str1;
str = "";
str1 = "";
//如果其大於127，則反之出現少於0，需要進行＋256運算
for (int k = 0; k < m; k ++)
{
if (byte2[n-k] < 0)
{
j = byte2[n-k];
j = j + 256;
}
else
{
j = byte2[n-k];
}
str1 = Integer.toHexString(j);
//轉化為16進製，不足位補0
if (str1.length() < 2)
{
str1 = "0" + str1;
}
//格式的不同，表達屬性的字節也有變化
if(fileextendname.equalsIgnoreCase("JPG")||fileextendname.equalsIgnoreCase("PNG"))
{
str = str1 + str;
}
else
{
str = str + str1;
}
}
FileAttributeValue = HexToDec(str);
return FileAttributeValue;
}
private static int HexToDec(String cadhex)
{
int n, i, j,k,decimal;
String CADHEX1;
n = 0;
i = 0;
j = 0;
k = 0;
decimal = 0;
CADHEX1 = null;
n =cadhex.length();
CADHEX1 = cadhex.trim().toUpperCase();
while(i < n)
{
j = CADHEX1.charAt(i);
if ((j >= 48) && (j < 65))
{
j = j - 48;
}
if (j >= 65)
{
j = j - 55;
}
i = i + 1;
//16冪運算
k = 1;
for (int m = 0; m < (n-i); m ++)
{
k = 16 * k;
}
decimal = j*k + decimal;
}
return decimal;
}
private static String getPicColor(int color)
{
int k;
k = 1;
String piccolor;
piccolor = null;
//2冪運算
for (int m = 0; m < color; m ++)
{
k = 2 * k;
}
Integer kk;
kk = null;
if (k >= 1048576)
{
k = k / 1048576;
kk = new Integer(k);
piccolor = kk.toString() + "M";
}
else if (k >= 1024)
{
k = k / 1024;
kk = new Integer(k);
piccolor = kk.toString() + "K";
}
else if (k > 0)
{
kk = new Integer(k);
piccolor = kk.toString();
}
return piccolor;
}
}
四、 後記
以上源代碼在Win 2k和Jbuilder 7等環境下正常運行過。由於時間關係，該程序目前隻支持GIF(有87A/89A兩種格式)、JPG、PNG和BMP格式。另外，對於PNG圖片因缺少相關資源文件未作色彩分析。