IP地址和INT的相互转换
IP地址和INT的相互转换:
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思路:解决IP地址和INT相互调用,把ip地址转换成十进制,在通过计算公式转换成INT。
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计算公式为:ip地址:w.x.y.z? 转为? 16777216 * w + 65536 * x + 256 * y + z
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IP 转INT
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IP Address = 202.186.13.4
w = 202, x = 186, y = 13 and z = 4
INT IP Number = 16777216*202 + 65536*186 + 256*13 + 4
= 3388997632 + 12189696 + 3328 + 4
= 3401190660
INT 转 IP:
w = int ( IP Number / 16777216 ) % 256
x = int ( IP Number / 65536 ) % 256
y = int ( IP Number / 256 ) % 256
z = int ( IP Number ) % 256
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