java把ip地址存放到一个int型变量

java把ip地址存放到一个int型变量

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package com.zwx;

public class test {
	public static void main(String[] args) {
		byte[] bt = new byte[4];
		bt[0] = 111;
		bt[1] = 112;
		bt[2] = 113;
		bt[3] = 114;
		
		int i = byteArrayToInt(bt);  
		System.out.println("int--->" + i);
		
		byte[] b = intToByteArrayl(i);
		System.out.print("ip--->");
		for (byte bb : b) {
		   System.out.print(bb + ".");
		}
	}
	
	//int转ip(字节数组)
	public static byte[] intToByteArrayl(int i) {   
	    byte[] result = new byte[4];   
	    result[0] = (byte)((i >> 24) & 0xFF);
	    result[1] = (byte)((i >> 16) & 0xFF);
	    result[2] = (byte)((i >> 8) & 0xFF); 
	    result[3] = (byte)(i & 0xFF);
	    return result;
	}
	
	//ip(字节数组)转int
	public static int byteArrayToInt(byte[] b) {
        int value = 0;
        for (int i = 0; i < 4; i++) {
    	   value |= b[i];
		   if ( i < 3 ) {
			 value = value << 8;
		   }
        }
        return value;
	}
	
}

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运行结果：

int--->1869640050

ip--->111.112.113.114.

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java把ip地址存放到一个int型变量

原文：http://halloffame.iteye.com/blog/2253008