Python实现半角数字转全角数字的完整方法

def half_to_full_width_number(text):
    """
    将字符串中的半角数字转换为全角数字
    
    参数:
        text: 输入字符串
        
    返回:
        转换后的字符串
    """
    result = []
    for char in text:
        if '0' <= char <= '9':
            # 半角数字转全角：Unicode码点+65248
            full_char = chr(ord(char) + 0xFEE0)
            result.append(full_char)
        else:
            result.append(char)
    return ''.join(result)

# 测试示例
if __name__ == "__main__":
    test_cases = [
        "1234567890",
        "电话: 13800138000",
        "版本号3.14.159",
        "混合123abc456",
        "没有数字的字符串"
    ]
    
    print("半角数字转全角数字测试:")
    print("=" * 40)
    for case in test_cases:
        converted = half_to_full_width_number(case)
        print(f"原始: {case}")
        print(f"转换: {converted}")
        print("-" * 40)

def half_to_full_width_number_fast(text):
    """
    使用translate方法快速转换
    """
    # 创建转换表
    translation_table = str.maketrans(
        '0123456789',
        '０１２３４５６７８９'
    )
    return text.translate(translation_table)

# 测试
if __name__ == "__main__":
    test_str = "Python 3.10发布于2021年10月"
    print("快速转换测试:")
    print(f"原始: {test_str}")
    print(f"转换: {half_to_full_width_number_fast(test_str)}")

import re

def half_to_full_width_number_regex(text):
    """
    使用正则表达式替换半角数字
    """
    def replace_match(match):
        digit = match.group()
        return chr(ord(digit) + 0xFEE0)
    
    return re.sub(r'[0-9]', replace_match, text)

# 测试
if __name__ == "__main__":
    test_str = "订单号: 987654321, 金额: 199.99元"
    print("正则表达式转换测试:")
    print(f"原始: {test_str}")
    print(f"转换: {half_to_full_width_number_regex(test_str)}")

import timeit

def test_performance():
    test_str = "Python 3.10发布于2021年10月，版本号1234567890" * 100
    
    methods = [
        ("基础方法", half_to_full_width_number),
        ("translate方法", half_to_full_width_number_fast),
        ("正则方法", half_to_full_width_number_regex)
    ]
    
    print("性能测试:")
    print("=" * 40)
    for name, func in methods:
        time = timeit.timeit(lambda: func(test_str), number=1000)
        print(f"{name}: {time:.4f}秒")

if __name__ == "__main__":
    test_performance()

class HalfFullWidthConverter:
    """
    半角全角字符转换工具类
    """
    
    @staticmethod
    def half_to_full_number(text):
        """半角数字转全角数字"""
        return text.translate(str.maketrans(
            '0123456789',
            '０１２３４５６７８９'
        ))
    
    @staticmethod
    def half_to_full_alpha(text):
        """半角字母转全角字母"""
        return text.translate(str.maketrans(
            'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ',
            'ａｂｃｄｅｆｇｈｉｊｋｌｍｎｏｐｑｒｓｔｕｖｗｘｙｚＡＢＣＤＥＦＧＨＩＪＫＬＭＮＯＰＱＲＳＴＵＶＷＸＹＺ'
        ))
    
    @staticmethod
    def half_to_full(text):
        """半角数字和字母转全角"""
        return HalfFullWidthConverter.half_to_full_alpha(
            HalfFullWidthConverter.half_to_full_number(text)
        )
    
    @staticmethod
    def full_to_half_number(text):
        """全角数字转半角数字"""
        return text.translate(str.maketrans(
            '０１２３４５６７８９',
            '0123456789'
        ))

# 测试工具类
if __name__ == "__main__":
    converter = HalfFullWidthConverter()
    
    test_str = "ABCabc123测试TEST456"
    print("工具类测试:")
    print(f"原始: {test_str}")
    print(f"数字转全角: {converter.half_to_full_number(test_str)}")
    print(f"字母转全角: {converter.half_to_full_alpha(test_str)}")
    print(f"全部转全角: {converter.half_to_full(test_str)}")
    print(f"全角数字转半角: {converter.full_to_half_number('１２３４５')}")

text = "本文发布于2023年5月1日，阅读量已达10000+"
full_text = HalfFullWidthConverter.half_to_full(text)
print(full_text)
# 输出: 本文发布于２０２３年５月１日，阅读量已达１００００+

def clean_phone_number(phone):
    """清洗电话号码，确保所有数字为半角"""
    return HalfFullWidthConverter.full_to_half_number(phone).replace(" ", "")

phone = "１３８　００１３　８０００"
print(clean_phone_number(phone))  # 输出: 13800138000

import random

def generate_verification_code(length=6):
    """生成全角数字验证码"""
    code = ''.join(random.choices('0123456789', k=length))
    return HalfFullWidthConverter.half_to_full_number(code)

print("验证码:", generate_verification_code())  # 输出类似: 验证码: ７８９４５６