Java IPv6 to Long Array Conversion: Efficient Code Example

以下是将IPv6地址转换为long数组的Java代码示例：

import java.math.BigInteger;
import java.net.Inet6Address;
import java.net.InetAddress;
import java.net.UnknownHostException;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;

public class IPv6ToLongArray {
    public static long[] toLongArray(String ipv6) throws UnknownHostException {
        InetAddress inetAddr = InetAddress.getByName(ipv6);
        if (!(inetAddr instanceof Inet6Address)) {
            throw new IllegalArgumentException('Not an IPv6 address');
        }
        byte[] bytes = inetAddr.getAddress();
        ByteBuffer buffer = ByteBuffer.wrap(bytes);
        buffer.order(ByteOrder.BIG_ENDIAN);
        long[] longArray = new long[2];
        longArray[0] = buffer.getLong();
        longArray[1] = buffer.getLong();
        return longArray;
    }
    
    public static void main(String[] args) throws UnknownHostException {
        String ipv6 = '2001:db8:85a3:0:0:8a2e:370:7334';
        long[] longArray = toLongArray(ipv6);
        System.out.println('Long array: ' + longArray[0] + ', ' + longArray[1]);
    }
}

该示例使用Java的InetAddress类将IPv6地址转换为字节数组，然后使用ByteBuffer类将字节数组转换为long数组。注意，IPv6地址由8个16位的部分组成，因此将其转换为long数组时需要使用两个64位的long值。