一个Hex转换

1、byte[]转ASCII

public static String byteArr2HexStr(byte[] arrB) throws Exception {

int iLen = arrB.length;

//每个byte用两个字符才能表示，所以字符串的长度是数组长度的两倍

StringBuffer sb = new StringBuffer(iLen * 2);

for (int i = 0; i < iLen; i++) {

int intTmp = arrB[i];

//把负数转换为正数

while (intTmp < 0) {

intTmp = intTmp + 256;

}

//小于0F的数需要在前面补0

if (intTmp < 16) {

sb.append("0");

}

sb.append(Integer.toString(intTmp, 16));

}

return sb.toString();

}

2、ASCII转byte[]

public static byte[] hexStr2ByteArr(String strIn) throws Exception {

byte[] arrB = strIn.getBytes();

int iLen = arrB.length;

//两个字符表示一个字节，所以字节数组长度是字符串长度除以2

byte[] arrOut = new byte[iLen / 2];

for (int i = 0; i < iLen; i = i + 2) {

String strTmp = new String(arrB, i, 2);

arrOut[i / 2] = (byte) Integer.parseInt(strTmp, 16);

}

return arrOut;

}

3、还有一个就是RGB与HEX转换

//IE HEX 转为 FF RGB

function HEX2RGB(HEXcolor){

//如果IE不转

if(document.all)

return "#"+HEXcolor;

var r = parseInt(HEXcolor.substring(0,2),16);

var g = parseInt(HEXcolor.substring(2,4),16);

var b = parseInt(HEXcolor.substring(4,6),16);

return "rgb("+r+","+g+","+b+")";

}