The code looks like this:
/*Enter a byte and byte[] merge into byte[]*/ public byte[] byteMerger(byte byte_1, byte[] byte_2) { byte[] byte_3 = new byte[1 + byte_2.length]; byte_3[0] = byte_1; System.arraycopy(byte_2, 0, byte_3, 1, byte_2.length); return byte_3; } /*Enter a byte[] and byte[] merge into byte[]*/ public byte[] byteMerger(byte[] byte_1, byte[] byte_2) { byte[] byte_3 = new byte[1 + byte_2.length]; byte_3[0] = byte_1; System.arraycopy(byte_2, 0, byte_3, byte_1.length, byte_2.length); return byte_3; } /*Input a string (hex eg:ff) outputs to hex byte[], note that the input is lowercase hex string*/ public byte[] hexStringToByte(String hex) { int len = (hex.length() / 2); byte[] result = new byte[len]; char[] achar = hex.toCharArray(); for (int i = 0; i < len; i++) { int pos = i * 2; result[i] = (byte) (charToByte(achar[pos]) << 4 | charToByte(achar[pos + 1])); } //System.out.println(Arrays.toString(result)); return result; } private byte charToByte(char c) { //return (byte) "0123456789ABCDEF".indexOf(c); return (byte) "0123456789abcdef".indexOf(c); } /*Input a decimal numeric string, output hex string (2 bits, eg: f, output 0f)*/ String value= "100"; int parseInt = Integer.parseInt(value, 10); String hexString = Integer.toHexString(parseInt); if (hexString.length() < 2) { hexString = '0' + hexString; } header = header + hexString; } /*Input hex byte[] Output hexString*/ public static String byteArrayToHexStr(byte[] byteArray) { if (byteArray) == null) { return null; } char[] hexArray = "0123456789ABCDEF".toCharArray(); char[] hexChars = new char[byteArray.length * 2]; for (int j = 0; j < byteArray.length; j++) { int v = byteArray[j] & 0xFF; hexChars[j * 2] = hexArray[v >>> 4]; hexChars[j * 2 + 1] = hexArray[v & 0x0F]; } return new String(hexChars); }PS: Let's take a look at the conversion of js to special characters in url
let str = "http%3A%2F%2Fxxxxxxxx%2Findex.php%2Fxxxxxxx%2FMember%2Fregister%3Frecommend_id%3D11442%26id%3D87"; function replaceStr(str){ str = str.replace(/%3A/g, ":"); str = str.replace(/%2F/g, "/"); str = str.replace(/%3F/g, "?"); str = str.replace(/%3D/g, "="); str = str.replace(/%26/g, "&"); str = str.replace(/%3F/g, "?"); str = str.replace(/%3D/g, "="); str = str.replace(/%26/g, "&"); str = str.replace(/%26/g, "&"); str = str.replace(/%2B/g, "+"); str = str.replace(/%20/g, " "); str = str.replace(/%23/g, "#"); return str; } console.log(replaceStr(str)); Summarize
The above is the method of converting byte[], String, Hex strings and other Java that the editor introduced to you. I hope it will be helpful to you. If you have any questions, please leave me a message and the editor will reply you in time. Thank you very much for your support to Wulin.com website!