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？

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();

}

}

}