java代码检查是否为有效ip地址

/*Java 验证Ip是否合法*/ public static boolean isIPAddress(String ipaddr) { boolean flag = false; Pattern pattern = Pattern.compile("\\b((?!\\d\\d\\d)\\d+|1\\d\\d|2[0-4]\\d|25[0-5])\\.((?!\\d\\d\\d)\\d+|1\\d
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