Flask接口签名sign原理与实例代码浅析
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2023-01-30
Java中byte[]、String、Hex字符串等转换的方法
代码如下所示:
/*输入一个byte和byte[]合并为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;
}
/*输入一个byte[]和byte[]合并为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;
}
/*输入一个string(16进制的字符hex eg:ff)输出为16进制的byte[],注意输入为小写的hex字符串*/
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);
}
/*输入10进制数字字符串,输出hex字符串(2位,eg: f 则输出 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;
}
/*输入16进制byte[]输出16进制字符串*/
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:下面看下js对url中特殊字符的转换
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(/%2B/g, "+");
str = str.replace(/%20/g, " ");
str = str.replace(/%23/g, "#");
return str;
}
console.log(replaceStr(str));
总结
以上所述是给大家介绍的java中byte[]、String、Hex字符串等转换的方法,希望对大家有所帮助,如果大家有任何疑问请给我留言,会及时回复大家的。在此也非常感谢大家对我们网站的支持!
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