张翔
174 lines
3.9 KiB
Python
174 lines
3.9 KiB
Python
"""
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字符串处理工具类
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提供字符串相关的工具方法
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作者: 张翔
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日期: 2026-04-01
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"""
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import random
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import string
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import re
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from typing import Optional
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class StringHelper:
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"""字符串处理工具类"""
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@staticmethod
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def truncate(text: str, max_length: int = 100, suffix: str = "...") -> str:
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"""
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截断字符串
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Args:
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text: 原始字符串
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max_length: 最大长度
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suffix: 后缀
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Returns:
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截断后的字符串
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"""
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if not text:
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return ""
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if len(text) <= max_length:
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return text
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return text[:max_length] + suffix
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@staticmethod
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def mask_phone(phone: str) -> str:
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"""
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手机号脱敏
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Args:
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phone: 手机号
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Returns:
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脱敏后的手机号
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"""
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if not phone or len(phone) < 7:
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return phone
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return phone[:3] + "****" + phone[-4:]
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@staticmethod
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def mask_email(email: str) -> str:
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"""
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邮箱脱敏
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Args:
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email: 邮箱
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Returns:
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脱敏后的邮箱
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"""
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if not email or "@" not in email:
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return email
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parts = email.split("@")
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username = parts[0]
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domain = parts[1]
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if len(username) <= 2:
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masked_username = username[0] + "***"
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else:
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masked_username = username[:2] + "***"
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return f"{masked_username}@{domain}"
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@staticmethod
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def mask_id_card(id_card: str) -> str:
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"""
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身份证号脱敏
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Args:
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id_card: 身份证号
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Returns:
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脱敏后的身份证号
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"""
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if not id_card or len(id_card) < 8:
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return id_card
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return id_card[:4] + "**********" + id_card[-4:]
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@staticmethod
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def random_string(length: int = 16, chars: str = None) -> str:
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"""
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生成随机字符串
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Args:
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length: 长度
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chars: 字符集,默认为字母数字
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Returns:
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随机字符串
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"""
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if chars is None:
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chars = string.ascii_letters + string.digits
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return ''.join(random.choice(chars) for _ in range(length))
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@staticmethod
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def camel_to_snake(name: str) -> str:
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"""
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驼峰命名转下划线命名
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Args:
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name: 驼峰命名字符串
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Returns:
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下划线命名字符串
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"""
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if not name:
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return ""
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s1 = re.sub('(.)([A-Z][a-z]+)', r'\1_\2', name)
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return re.sub('([a-z0-9])([A-Z])', r'\1_\2', s1).lower()
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@staticmethod
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def snake_to_camel(name: str) -> str:
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"""
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下划线命名转驼峰命名
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Args:
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name: 下划线命名字符串
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Returns:
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驼峰命名字符串
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"""
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if not name:
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return ""
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components = name.split('_')
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return components[0] + ''.join(x.title() for x in components[1:])
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@staticmethod
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def is_empty(text: Optional[str]) -> bool:
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"""
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判断字符串是否为空
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Args:
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text: 字符串
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Returns:
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是否为空
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"""
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return text is None or text.strip() == ""
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@staticmethod
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def default_if_empty(text: Optional[str], default: str) -> str:
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"""
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如果字符串为空则返回默认值
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Args:
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text: 字符串
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default: 默认值
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Returns:
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字符串或默认值
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"""
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return text if not StringHelper.is_empty(text) else default
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