Java将十六进制UTF8转换为UTF-16

import java.nio.charset.Charset;
import java.nio.charset.StandardCharsets;

public class HexUTF8ToUTF16Converter {
    public static void main(String[] args) {
        String hexUTF8 = "e4b8ade69687"; // 十六进制UTF8编码

        // 将十六进制UTF8编码转换为字节数组
        byte[] utf8Bytes = hexStringToByteArray(hexUTF8);

        // 将字节数组解码为UTF8字符串
        String utf8String = new String(utf8Bytes, StandardCharsets.UTF_8);

        // 将UTF8字符串转换为字节数组
        byte[] utf8BytesAgain = utf8String.getBytes(StandardCharsets.UTF_8);

        // 将字节数组解码为UTF-16字符串
        String utf16String = new String(utf8BytesAgain, StandardCharsets.UTF_16);

        System.out.println("UTF-16字符串: " + utf16String);
    }

    private static byte[] hexStringToByteArray(String hexString) {
        int length = hexString.length();
        byte[] byteArray = new byte[length / 2];
        for (int i = 0; i < length; i += 2) {
            byteArray[i / 2] = (byte) ((Character.digit(hexString.charAt(i), 16) << 4)
                    + Character.digit(hexString.charAt(i + 1), 16));
        }
        return byteArray;
    }
}