java ip地址ipv4,ipv6简单判断及ping方式记录

Myth丶恋晨 2023-02-09 14:26 13阅读 0赞

## 摘要 ##

近期系统用到判断ip地址和ping场景,发现两个比较好用得方法,不依赖第三方包,特此记录一下

## 环境 ##

JDK1.8

## 代码 ##

@Test
        public void test() throws Exception {
            String address1 = "127.0.0.1";
            String address2 = "127.0.0.256";
            String address3 = "fe80::2ca6:bfce:e67f:c0a6%21";
            String address4 = "10.0.0.1";
    
            log.info("address {}, result is {}", address1, checkIpAddress(address1));
            log.info("address {}, result is {}", address2, checkIpAddress(address2));
            log.info("address {}, result is {}", address3, checkIpAddress(address3));
    
            // ping, 3秒超时
            log.info(" address {} reachable: {}", address3, InetAddress.getAllByName(address3)[0].isReachable(3000));
            log.info(" address {} reachable: {}", address4, InetAddress.getAllByName(address4)[0].isReachable(3000));
        }
    
        private String checkIpAddress(String ipAddress) {
            InetAddress inetAddress;
            try {
                inetAddress = InetAddress.getAllByName(ipAddress)[0];
                if (inetAddress instanceof Inet4Address) {
                    return "ipv4";
                } else {
                    return "ipv6";
                }
            } catch (UnknownHostException e) {
                return "pattern error!";
            }
        }

## 运行结果 ##

15:35:41.830 [main] INFO  - address 127.0.0.1, result is ipv4
    15:35:41.844 [main] INFO  - address 127.0.0.256, result is pattern error!
    15:35:41.845 [main] INFO  - address fe80::2ca6:bfce:e67f:c0a6%21, result is ipv6
    15:35:41.847 [main] INFO  -  address fe80::2ca6:bfce:e67f:c0a6%21 reachable: true
    15:35:44.499 [main] INFO  -  address 10.0.0.1 reachable: false