java – 如何解析包含Alpha字符的IP地址或主机名?
发布时间:2020-12-15 04:29:21 所属栏目:Java 来源:网络整理
导读:我试图分离两种不同类型的字符串,IP地址和DNS地址.我无法弄清楚如何拆分它.我最初的想法是: String stringIP = "123.345.12.1234";String stringDNS = "iam.adns234.address.com";if(!Pattern.matches("^[a-zA-Z0-9.]*$",stringDNS)){ //I only want to get
我试图分离两种不同类型的字符串,IP地址和DNS地址.我无法弄清楚如何拆分它.我最初的想法是:
String stringIP = "123.345.12.1234"; String stringDNS = "iam.adns234.address.com"; if(!Pattern.matches("^[a-zA-Z0-9.]*$",stringDNS)){ //I only want to get IP type strings here,so I am trying to separate out anything containing alpha characters. `stringDNS` should not be allowed into the if statement. } 解决方法public static final String IPV4_REGEX = "A(25[0-5]|2[0-4]d|[0-1]?d?d)(.(25[0-5]|2[0-4]d|[0-1]?d?d)){3}z"; if(string.matches(IPV4_REGEX) { //.... } 请注意,您发布的“123.345.12.1234”的IP地址不是有效的IPV4地址. (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |