位操作实例

主要的类

package cn.IpUtils;

import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;



/**
 * yicha 
 * Sep 8, 2008 
 */

public class IpUtil {
	
	 private static final String CONFIG_RESOURCE = "/IPList.txt";
	
	 /**
     * 从配置文件读取IP区段信息，组成ArrayList返回
     */
    public ArrayList getIPSec() {
        
        InputStream ins = IpUtil.class
                .getResourceAsStream(CONFIG_RESOURCE);

        try {
            InputStreamReader fr = new InputStreamReader(ins,"utf-8");
            BufferedReader br = new BufferedReader(fr);
            String temp = br.readLine();
            StringBuffer sb = new StringBuffer();
            while (null != temp) {
                sb.append(temp);
                sb.append("\n");
                temp = br.readLine();
            }

            String[] ips = sb.toString().split("\n");
            if (null != sb && ips.length >= 2) {
                ArrayList al = new ArrayList();
                System.out.println(ips[0]);
                for (int i = 0; i < ips.length; i++) {                	
                    String[] a = ips[i].split("\t");
                    IpBean sec = new IpBean();
                    sec.setFrom(String.valueOf(this.convertIP(a[0])));
                    sec.setTo(a[1]);
                    sec.setPosition(a[2]);
                    sec.setId(i);
                    al.add(sec);
                }
                return al;
                
            }

        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }

        return null;
    }
	
	/**
     * 将IP转换为数字  位操作
     * 
     * @param ip
     * @return
     */
    private long convertIP(String ip) {
        long result = 0;
        String[] temp = ip.split("\\.");
        for (int i = 0; i < 4; i++) {
            String current = temp[i];
            result <<= 8;
            result += this.convertStringToInt(current);
        }
        return result;
    }
    
    /**
     * 类型转换
     * 
     * @param i
     * @return
     */
    private int convertStringToInt(String i) {
    	int result=0;
    	try{
    		result=Integer.parseInt(i);
    	}catch(Exception e){
    		System.err.println("错误");
    	}
        return result;
    }

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		IpUtil iputil=new IpUtil();
		//3402407245
//		long temp=iputil.convertIP("204.202.157.77");
//		System.out.println(temp+"");
		IpBean sec ;
		ArrayList list=iputil.getIPSec();
		for(int i=0;i<80;i++){
			sec=(IpBean)list.get(i);
			System.out.println(sec.getId()+"\t"+sec.getFrom()+"\t"+sec.getTo()+"\t"+sec.getPosition());
		}
	}
}

ip类：

package cn.IpUtils;

/**
 * yicha 
 * Sep 8, 2008 
 */

public class IpBean {
	private String from; // IP段起始
    private String to; // IP结束
    private String position; // 地理名称    
    private int id = 0;

	public String getFrom() {
		return from;
	}

	public void setFrom(String from) {
		this.from = from;
	}

	public String getTo() {
		return to;
	}

	public void setTo(String to) {
		this.to = to;
	}

	public String getPosition() {
		return position;
	}

	public void setPosition(String position) {
		this.position = position;
	}

	public int getId() {
		return id;
	}

	public void setId(int id) {
		this.id = id;
	}

	
}

IPList中的内容:

220.194.48.134	220.194.048.134	北京联通
211.137.181.0	211.137.181.000	山东移动
211.137.181.1	211.137.181.001	山东移动
211.137.181.2	211.137.181.002	山东移动
211.137.181.3	211.137.181.003	山东移动
211.137.181.4	211.137.181.004	山东移动
211.137.181.5	211.137.181.005	山东移动