判断IP属于哪个范围

public class Test
{
    /** 
     * 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");  
    }

}