本文目录导读：
Linux/macOS 使用 sed 命令
单个文件替换
# 替换文件中的 old_string 为 new_string sed -i 's/old_string/new_string/g' filename.txt
批量替换当前目录下所有文件
# 替换所有 .txt 文件
sed -i 's/old_string/new_string/g' *.txt
# 递归替换所有文件
find . -type f -exec sed -i 's/old_string/new_string/g' {} +
创建备份文件
# 替换前创建 .bak 备份 sed -i.bak 's/old_string/new_string/g' *.txt
Python 脚本 (跨平台)
import os
import sys
def replace_in_files(directory, old_str, new_str, file_extensions=None):
"""
批量替换文件中的字符串
:param directory: 根目录
:param old_str: 要替换的字符串
:param new_str: 新字符串
:param file_extensions: 文件扩展名列表，如 ['.txt', '.py']
"""
for root, dirs, files in os.walk(directory):
for filename in files:
# 如果指定了扩展名，只处理匹配的文件
if file_extensions:
ext = os.path.splitext(filename)[1]
if ext not in file_extensions:
continue
filepath = os.path.join(root, filename)
try:
with open(filepath, 'r', encoding='utf-8') as f:
content = f.read()
if old_str in content:
new_content = content.replace(old_str, new_str)
with open(filepath, 'w', encoding='utf-8') as f:
f.write(new_content)
print(f"已替换: {filepath}")
except Exception as e:
print(f"处理文件 {filepath} 时出错: {e}")
# 使用示例
if __name__ == "__main__":
# 在指定目录替换所有文件
replace_in_files("./my_project", "old_text", "new_text")
# 只替换特定扩展名的文件
replace_in_files("./my_project", "old_text", "new_text", ['.txt', '.html', '.js'])
PowerShell (Windows)
# 替换当前目录所有 .txt 文件
Get-ChildItem -Path . -Filter *.txt -Recurse | ForEach-Object {
(Get-Content $_.FullName) -replace 'old_string', 'new_string' | Set-Content $_.FullName
}
# 带参数版本
param(
[string]$Path = ".",
[string]$OldString = "old",
[string]$NewString = "new",
[string]$Extension = "*"
)
Get-ChildItem -Path $Path -Filter "*.$Extension" -Recurse | ForEach-Object {
$content = Get-Content $_.FullName -Raw
$content -replace $OldString, $NewString | Out-File $_.FullName -Encoding UTF8
}
Perl 脚本 (跨平台)
# 批量替换并创建备份
perl -i.bak -pe 's/old_string/new_string/g' *.txt
# 递归替换
find . -name "*.txt" -exec perl -i -pe 's/old_string/new_string/g' {} \;
高级 Python 脚本（支持正则）
import os
import re
def advanced_replace(directory, pattern, replacement, file_extensions=None, use_regex=True):
"""
高级替换功能，支持正则表达式
"""
compiled_pattern = re.compile(pattern) if use_regex else None
for root, dirs, files in os.walk(directory):
# 跳过 .git 等目录
dirs[:] = [d for d in dirs if not d.startswith('.')]
for filename in files:
# 跳过二进制文件和临时文件
if filename.endswith(('.pyc', '.bak', '.swp')):
continue
if file_extensions:
ext = os.path.splitext(filename)[1]
if ext not in file_extensions:
continue
filepath = os.path.join(root, filename)
try:
with open(filepath, 'r', encoding='utf-8') as f:
content = f.read()
if use_regex:
new_content, count = compiled_pattern.subn(replacement, content)
else:
new_content = content.replace(pattern, replacement)
count = content.count(pattern)
if count > 0:
with open(filepath, 'w', encoding='utf-8') as f:
f.write(new_content)
print(f"已替换 {count} 处: {filepath}")
except Exception as e:
print(f"跳过文件 {filepath}: {e}")
# 使用示例
advanced_replace(
"./project",
r"old_\w+", # 正则匹配
"new_value",
file_extensions=['.txt', '.html'],
use_regex=True
)
安全建议
- 先测试：在正式运行前，先用小范围文件测试
- 备份数据：重要文件先备份
- 使用版本控制：在 Git 等版本控制环境中操作
- 注意编码：确保文件编码（UTF-8、GBK等）正确
快速使用命令示例
# Linux/macOS - 替换所有 html 文件中的域名
sed -i 's/old-domain.com/new-domain.com/g' *.html
# Python - 简单一行命令
python -c "
import os
for f in os.listdir('.'):
if f.endswith('.txt'):
with open(f,'r+') as file:
content = file.read().replace('old','new')
file.seek(0)
file.write(content)
file.truncate()
"
根据您的操作系统和具体需求选择合适的方案,对于简单的任务，sed 命令最快捷；对于复杂的替换逻辑，Python 更灵活。
