如何将string转换为byte
问题描述:
开发中需要这样的功能,将String str = "0f8adffb11dc" 转换为byte[] byteText = { 0x0f, 0x8a, 0xdf, 0xfb,0x11, 0xdc};请问如何实现,谢谢!
答
public class Test {
public static byte uniteBytes(byte src0, byte src1) {
byte _b0 = Byte.decode("0x" + new String(new byte[]{src0})).byteValue();
_b0 = (byte)(_b0 << 4);
byte _b1 = Byte.decode("0x" + new String(new byte[]{src1})).byteValue();
byte ret = (byte)(_b0 ^ _b1);
return ret;
}
public static byte[] HexString2Bytes(String src){
byte[] ret = new byte[src.length()/2];
byte[] tmp = src.getBytes();
for(int i=0; i<src.length()/2; i++){
ret[i] = uniteBytes(tmp[i*2], tmp[i*2+1]);
}
return ret;
}
public static void main(String[] args) {
byte[] byteText = { 0x0f, (byte) 0x8a, (byte) 0xdf, (byte) 0xfb,0x11, (byte) 0xdc};
byte[] ret = Test.HexString2Bytes("0f8adffb11dc");
}
}
答
String str = "0f8adffb11dc";
byte[] result = new byte[str.length() / 2];
for (int i = 0; i < str.length(); i += 2)
{
result[i / 2] = Byte.parse(str.subString(i, 2), 16);
}
答
两位字符串一组截取,然后转换成十六进制数据。
答
string str = "0f8adffb11dc";
byte[] resultList = new byte[str.Length / 2];
for (int i = 0; i < str.Length / 2; i++)
{
resultList[i] = Convert.ToByte(str.Substring(i * 2, 2), 16);
}