Python任意字符串转16, 32, 64进制的方法

Python字符串转数字importbinasciis='test123456test'str_16=binascii.b2a_hex(s.encode('utf-8'))#字符串转16进制p

Python字符串转数字

 import binascii

 s = 'test123456test'
 str_16 = binascii.b2a_hex(s.encode('utf-8')) # 字符串转16进制
 print(str_16)

 def baseN(num, b):
 return ((num == 0) and "0") or \
 (baseN(num // b, b).lstrip("0") + "0123456789abcdefghijklmnopqrstuvwxyz"[num % b])

 num_10 = int(str_16, 16) # 16进制转10进制
 print(num_10)

 str_32 = baseN(num_10, 32) # 10进制转32进制
 print(str_32)

 num_10_2 = int(str_32, 32) # 32进制转10进制
 print(num_10_2)

 num_16 = hex(num_10) # 10进制转16进制数
 print(num_16)

 ss = str_16.decode('hex') # 16进制串转字符串
 print(ss)

执行结果

7465737431323334353674657374
2360797289681380981751517517542260
1q6asrk64p36d1l6pq6asrk
2360797289681380981751517517542260
0x7465737431323334353674657374L
test123456test

10进制转n进制

def base10toN(num,n):
 """Change a to a base-n number.
 Up to base-36 is supported without special notation."""
 num_rep={10:'a',
 11:'b',
 12:'c',
 13:'d',
 14:'e',
 15:'f',
 16:'g',
 17:'h',
 18:'i',
 19:'j',
 20:'k',
 21:'l',
 22:'m',
 23:'n',
 24:'o',
 25:'p',
 26:'q',
 27:'r',
 28:'s',
 29:'t',
 30:'u',
 31:'v',
 32:'w',
 33:'x',
 34:'y',
 35:'z'}
 new_num_string=''
 current=num
 while current!=0:
 remainder=current%n
 if 36>remainder>9:
 remainder_string=num_rep[remainder]
 elif remainder>=36:
 remainder_string='('+str(remainder)+')'
 else:
 remainder_string=str(remainder)
 new_num_string=remainder_string+new_num_string
 current=current/n
 return new_num_string

进阶版

 def baseN(num, b):
 return ((num == 0) and "0") or \
 (baseN(num // b, b).lstrip("0") + "0123456789abcdefghijklmnopqrstuvwxyz"[num % b])

64进制

 def encode_b64(n):
 table = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ-_'
 result = []
 temp = n
 if 0 == temp:
 result.append('0')
 else:
 while 0 < temp:
 result.append(table[temp % 64])
 temp /= 64
 return ''.join([x for x in reversed(result)])


 def decode_b64(str):
 table = {"0": 0, "1": 1, "2": 2, "3": 3, "4": 4, "5": 5,
 "6": 6, "7": 7, "8": 8, "9": 9,
 "a": 10, "b": 11, "c": 12, "d": 13, "e": 14, "f": 15, "g": 16,
 "h": 17, "i": 18, "j": 19, "k": 20, "l": 21, "m": 22, "n": 23,
 "o": 24, "p": 25, "q": 26, "r": 27, "s": 28, "t": 29, "u": 30,
 "v": 31, "w": 32, "x": 33, "y": 34, "z": 35,
 "A": 36, "B": 37, "C": 38, "D": 39, "E": 40, "F": 41, "G": 42,
 "H": 43, "I": 44, "J": 45, "K": 46, "L": 47, "M": 48, "N": 49,
 "O": 50, "P": 51, "Q": 52, "R": 53, "S": 54, "T": 55, "U": 56,
 "V": 57, "W": 58, "X": 59, "Y": 60, "Z": 61,
 "-": 62, "_": 63}
 result = 0
 for i in xrange(len(str)):
 result *= 64
 result += table[str[i]]
 return result

Java字符串转数字

BigInteger integer = new BigInteger(hexString.toString(), 16);
integer.toString(32);

import java.math.BigInteger;

public class Main {
 public static void main(String[] argv) throws Exception {
 BigInteger bi = new BigInteger("1023");
 bi = new BigInteger("1111111111", 2); 
 String s = bi.toString(2); 
 System.out.println(s);
 bi = new BigInteger("1000", 8);

 System.out.println(s = bi.toString(8));

 bi = new BigInteger("1023"); 
 s = bi.toString(); 
 System.out.println(s);

 bi = new BigInteger("3ff", 16); 
 s = bi.toString(16); 
 System.out.println(s);
 }
}

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Python 字符串 16进制 32进制 64进制