byte[] 和String十六进制

1 十六进制的字符串->byte[] :

    int len = (hex.length() / 2);

    byte[] result = new byte[len]; 

    char[] achar = hex.toCharArray(); 

    for (int i = 0; i

        intpos=i*2;

        result[i] =(byte)((byte) "0123456789ABCDEF".indexOf(achar[pos]) <<4|(byte) "0123456789ABCDEF".indexOf(achar[pos+1]));

    } 

2 byte [] 转换成16 进制的字符串：

byte[] bArray;

StringBuffersb=newStringBuffer(bArray.length);

StringsTemp;

for(inti=0;i

sTemp=Integer.toHexString(0xFF&bArray[i]);

if(sTemp.length() <2)

sb.append(0);

sb.append(sTemp.toUpperCase());

  }