34 lines
981 B
Java
34 lines
981 B
Java
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package com.example.demo.kafka.encrypt;
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public class Util {
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public static String getHexString(byte[] bytes) {
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String ret = "";
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for (int i = 0; i < bytes.length; i++) {
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ret += Integer.toString((bytes[i] & 0xff) + 0x100, 16).substring(1);
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}
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return ret.toUpperCase();
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}
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public static byte[] hexStringToBytes(String hexString)
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{
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if (hexString == null || hexString.equals(""))
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{
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return null;
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}
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hexString = hexString.toUpperCase();
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int length = hexString.length() / 2;
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char[] hexChars = hexString.toCharArray();
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byte[] d = new byte[length];
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for (int i = 0; i < length; i++)
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{
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int pos = i * 2;
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d[i] = (byte) (charToByte(hexChars[pos]) << 4 | charToByte(hexChars[pos + 1]));
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}
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return d;
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}
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private static byte charToByte(char c)
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{
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return (byte) "0123456789ABCDEF".indexOf(c);
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}
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}
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