Java判断IP是否在指定范围

public class ipTest { /** * 判断IP是否在指定范围; */ public static boolean ipIsValid(String ipSection, String ip) { if (ipSection == null) throw new NullPointerException("IP段不能为空!"); if (ip == null) throw new NullPointerException("IP不能为空!"); ipSection = ipSection.trim(); ip = ip.trim(); final String REGX_IP = "((25[0-5]|2[0-4]//d|1//d{2}|[1-9]//d|//d)//.){3}(25[0-5]|2[0-4]//d|1//d{2}|[1-9]//d|//d)"; final String REGX_IPB = REGX_IP + "//-" + REGX_IP; if (!ipSection.matches(REGX_IPB) || !ip.matches(REGX_IP)) return false; int idx = ipSection.indexOf('-'); String[] sips = ipSection.substring(0, idx).split("//."); String[] sipe = ipSection.substring(idx + 1).split("//."); String[] sipt = ip.split("//."); long ips = 0L, ipe = 0L, ipt = 0L; for (int i = 0; i < 4; ++i) { ips = ips << 8 | Integer.parseInt(sips[i]); ipe = ipe << 8 | Integer.parseInt(sipe[i]); ipt = ipt << 8 | Integer.parseInt(sipt[i]); } if (ips > ipe) { long t = ips; ips = ipe; ipe = t; } return ips <= ipt && ipt <= ipe; } public static void main(String[] args) { if (ipIsValid("192.168.1.1-192.168.1.10", "192.168.3.54")) { System.out.println("ip属于该网段"); } else System.out.println("ip不属于该网段"); } }

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