阅读:17556次
评论:3条
更新时间:2012-10-18
private final static byte[] hex = "0123456789ABCDEF".getBytes();
private static int parse(char c) {
if (c >= 'a')
return (c - 'a' + 10) & 0x0f;
if (c >= 'A')
return (c - 'A' + 10) & 0x0f;
return (c - '0') & 0x0f;
}
// 从字节数组到十六进制字符串转换
public static String Bytes2HexString(byte[] b) {
byte[] buff = new byte[2 * b.length];
for (int i = 0; i < b.length; i++) {
buff[2 * i] = hex[(b[i] >> 4) & 0x0f];
buff[2 * i + 1] = hex[b[i] & 0x0f];
}
return new String(buff);
}
// 从十六进制字符串到字节数组转换
public static byte[] HexString2Bytes(String hexstr) {
byte[] b = new byte[hexstr.length() / 2];
int j = 0;
for (int i = 0; i < b.length; i++) {
char c0 = hexstr.charAt(j++);
char c1 = hexstr.charAt(j++);
b[i] = (byte) ((parse(c0) << 4) | parse(c1));
}
return b;
}
public static void main(String[] args) {
byte[] bt = new byte[]{10, 2, 12, 14, 1, 0, 0, 1, 0, 31, 45, 1, 8, 0, 1, 0, -96, -45, 10, 3};
System.out.println(Bytes2HexString(bt));
System.out.println(Arrays.toString(HexString2Bytes("0A020C0E01000001001F2D0108000100A0D30A03")));
}
打印
0A020C0E01000001001F2D0108000100A0D30A03 [10, 2, 12, 14, 1, 0, 0, 1, 0, 31, 45, 1, 8, 0, 1, 0, -96, -45, 10, 3]
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3 楼 cuisuqiang 2013-07-19 14:18
// 返回无符号的2进制表示 1110011 String hex = Integer.toBinaryString(115); System.out.println(hex); // 返回2进制的字符串1110011对应的值 115 System.out.println(Integer.valueOf("1110011", 2)); // 16进制值转换成二进制 System.out.println(Long.parseLong("49", 16)); System.out.println(Long.parseLong("2F", 16));2 楼 sgq0085 2013-04-08 13:00
这里 & 0x0f 是做什么用的？
1 楼 befairy 2013-02-27 14:26
谢谢LZ分享。。