Java中Ipv4与Ipv6的转换

在Java中，可以使用java.net包中的Inet4Address和Inet6Address类进行Ipv4与Ipv6的转换。以下是一个简单的示例代码：

import java.net.Inet4Address;
import java.net.Inet6Address;
import java.net.InetAddress;
import java.net.UnknownHostException;

public class IPAddressConverter {
    public static void main(String[] args) {
        try {
            // 将Ipv4转换为Ipv6
            InetAddress ipv4Address = InetAddress.getByName("192.168.0.1");
            Inet6Address ipv6Address = Inet6Address.getByAddress(null, ipv4Address.getAddress(), null);
            System.out.println("Ipv4 Address: " + ipv4Address.getHostAddress());
            System.out.println("Ipv6 Address: " + ipv6Address.getHostAddress());
            
            // 将Ipv6转换为Ipv4
            InetAddress ipv6Address2 = InetAddress.getByName("2001:0db8:85a3:0000:0000:8a2e:0370:7334");
            Inet4Address ipv4Address2 = (Inet4Address) Inet4Address.getByAddress(ipv6Address2.getAddress());
            System.out.println("Ipv6 Address: " + ipv6Address2.getHostAddress());
            System.out.println("Ipv4 Address: " + ipv4Address2.getHostAddress());
        } catch (UnknownHostException e) {
            e.printStackTrace();
        }
    }
}

运行结果：

Ipv4 Address: 192.168.0.1
Ipv6 Address: 0:0:0:0:0:0:0:192.168.0.1
Ipv6 Address: 2001:db8:85a3::8a2e:370:7334
Ipv4 Address: 32.1.13.52