我有一个
Java文件
FileInputStream in = null;
try{
in = new FileInputStream("C:\\pic.bmp");
}catch{}
我想将pic.bmp转换为十六进制数值的数组,因此我可以将其编辑并保存为修改版本.
有没有一个java类来做这个？
解决方法
你运气好几个月前我不得不这样做.这是一个从压缩版本,从命令行接受两个参数.两个comand行参数都是文件名…第一个是输入文件,第二个是输出文件.输入文件以二进制读取,输出文件写为ASCII十六进制.希望你能适应你的需要.
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileWriter;
import java.io.IOException;
public class BinToHex
{
private final static String[] hexSymbols = { "0","1","2","3","4","5","6","7","8","9","a","b","c","d","e","f" };
public final static int BITS_PER_HEX_DIGIT = 4;
public static String toHexFromByte(final byte b)
{
byte leftSymbol = (byte)((b >>> BITS_PER_HEX_DIGIT) & 0x0f);
byte rightSymbol = (byte)(b & 0x0f);
return (hexSymbols[leftSymbol] + hexSymbols[rightSymbol]);
}
public static String toHexFromBytes(final byte[] bytes)
{
if(bytes == null || bytes.length == 0)
{
return ("");
}
// there are 2 hex digits per byte
StringBuilder hexBuffer = new StringBuilder(bytes.length * 2);
// for each byte,convert it to hex and append it to the buffer
for(int i = 0; i < bytes.length; i++)
{
hexBuffer.append(toHexFromByte(bytes[i]));
}
return (hexBuffer.toString());
}
public static void main(final String[] args) throws IOException
{
try
{
FileInputStream fis = new FileInputStream(new File(args[0]));
BufferedWriter fos = new BufferedWriter(new FileWriter(new File(args[1])));
byte[] bytes = new byte[800];
int value = 0;
do
{
value = fis.read(bytes);
fos.write(toHexFromBytes(bytes));
}while(value != -1);
fos.flush();
fos.close();
}
catch(Exception e)
{
e.printStackTrace();
}
}
}
