代码如下所示：
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/*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);
}
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ps：下面看下js对url中特殊字符的转换
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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));
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总结
以上所述是小编给大家介绍的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，小编会及时回复大家的。在此也非常感谢大家对服务器之家网站的支持！