如何编写正则表达式提取多行文本中@标签之间的完整内容

问题梳理 #

需要从带有@标签的多行文本中，拆分提取每个行首@标签起始到下一个行首@标签之前的全部内容，返回多段独立匹配结果，难点在于内容内部的@符号不能作为分隔符截断匹配。

原有正则问题说明 #

你当前使用的正则((^(@))|[^"]@)[^(@)]+\}\n中，[^(@)]+限制匹配内容不能出现@字符，只要内容中出现@就会提前截断，不符合需求。

正确解决方案 #

核心逻辑：仅将**行首位置的@**作为片段的分隔边界，内容中的@属于正常文本保留。

正则表达式（需开启两个匹配标志） #

^@.*?(?=\n^@|\Z)

需要开启的正则标志：

• m（多行模式）：让^匹配每一行的行首，而非仅整个文本的起始位置
• s（单行模式/点号通配模式）：让.可以匹配换行符，支持跨多行匹配

规则说明 #

• ^@：匹配每一行开头的@标签起始位
• .*?：非贪婪匹配任意字符，避免一次性覆盖多个片段
• (?=\n^@|\Z)：正向前瞻断言，匹配到下一个行首的@之前停止，或者匹配到整个文本的结束位置为止，既不会把下一个@标签纳入当前结果，也不会漏掉最后一段内容

匹配效果 #

用你提供的测试文本运行该正则，刚好返回4条独立的匹配结果，和预期一致，内容中的@firstDayOfWeek这类内部@不会触发截断。

常见语言调用示例 #

Python #

import re

# 测试文本替换为你的实际内容
test_text = """
@main.xml
{"adSize":"","adUnitId":"","alpha":1.0,"checked":0,"choiceMode":0,"clickable":1,"convert":"","customView":"","dividerHeight":1,"enabled":1,"firstDayOfWeek":1,"id":"_fab","image":{"rotate":0,"scaleType":"CENTER"},"indeterminate":"false","index":0,"inject":"","layout":{"backgroundColor":16777215,"borderColor":-16740915,"gravity"}
{"adSize":"","adUnitId":"","alpha":1.0,"checked":0,"choiceMode":0,"clickable":1,"convert":"","customView":"","dividerHeight":1,"enabled":1,"firstDayOfWeek":1,"id":"_fab","image":{"rotate":0,"scaleType":"CENTER"},"indeterminate":"false","index":0,"inject":"","layout":{"backgroundColor":16777215,"borderColor":-16740915,"gravity"}


@main.xml_fab
{"adSize":"","adUnitId":"","alpha":1.0,"checked":0,"choiceMode":0,"clickable":1,"convert":"","customView":"","dividerHeight":1,"enabled":1,"firstDayOfWeek":1,"id":"_fab","image":{"rotate":0,"scaleType":"CENTER"},"indeterminate":"false","index":0,"inject":"","layout":{"backgroundColor":16777215,"borderColor":-16740915,"gravity"}
{"adSize":"","adUnitId":"","alpha":1.0,"checked":0,"choiceMode":0,"clickable":1,"convert":"","customView":"","dividerHeight":1,"enabled":1,"firstDayOfWeek":1,"id":"_fab","image":{"rotate":0,"scaleType":"CENTER"},"indeterminate":"false","index":0,"inject":"","layout":{"backgroundColor":16777215,"borderColor":-16740915,"gravity"}
{"adSize":"","adUnitId":"","alpha":1.0,"checked":0,"choiceMode":0,"clickable":1,"convert":"","customView":"","dividerHeight":1,"enabled":1,"@firstDayOfWeek":1,"id":"_fab","image":{"rotate":0,"scaleType":"CENTER"},"indeterminate":"false","index":0,"inject":"","layout":{"backgroundColor":16777215,"borderColor":-16740915,"gravity"}


@main.xml
{"adSize":"","adUnitId":"","alpha":1.0,"checked":0,"choiceMode":0,"clickable":1,"convert":"","customView":"","dividerHeight":1,"enabled":1,"firstDayOfWeek":1,"id":"_fab","image":{"rotate":0,"scaleType":"CENTER"},"indeterminate":"false","index":0,"inject":"","layout":{"backgroundColor":16777215,"borderColor":-16740915,"gravity"}
{"adSize":"","adUnitId":"","alpha":1.0,"checked":0,"choiceMode":0,"clickable":1,"convert":"","customView":"","dividerHeight":1,"enabled":1,"firstDayOfWeek":1,"id":"_fab","image":{"rotate":0,"scaleType":"CENTER"},"indeterminate":"false","index":0,"inject":"","layout":{"backgroundColor":16777215,"borderColor":-16740915,"gravity"}

j
@main.xml_fab
{"adSize":"","adUnitId":"","alpha":1.0,"checked":0,"choiceMode":0,"clickable":1,"convert":"","customView":"","dividerHeight":1,"enabled":1,"firstDayOfWeek":1,"id":"_fab","image":{"rotate":0,"scaleType":"CENTER"},"indeterminate":"false","index":0,"inject":"","layout":{"backgroundColor":16777215,"borderColor":-16740915,"gravity"}
{"adSize":"","adUnitId":"","alpha":1.0,"checked":0,"choiceMode":0,"clickable":1,"convert":"","customView":"","dividerHeight":1,"enabled":1,"firstDayOfWeek":1,"id":"_fab","image":{"rotate":0,"scaleType":"center"},"indeterminate":"false","index":0,"inject":"","layout":{"backgroundColor":16777215,"borderColor":-16740915,"gravity"}
{"adSize":"","adUnitId":"","alpha":1.0,"checked":0,"choiceMode":0,"clickable":1,"convert":"","customView":"","dividerHeight":1,"enabled":1,"firstDayOfWeek":1,"id":"_fab","image":{"rotate":0,"scaleType":"CENTER"},"indeterminate":"false","index":0,"inject":"","layout":{"backgroundColor":16777215,"borderColor":-16740915,"gravity"}
"""

pattern = re.compile(r'^@.*?(?=\n^@|\Z)', flags=re.M | re.S)
result = pattern.findall(test_text)
# result即为4条独立的匹配片段

JavaScript #

// 测试文本替换为你的实际内容
const testText = `
@main.xml
{"adSize":"","adUnitId":"","alpha":1.0,"checked":0,"choiceMode":0,"clickable":1,"convert":"","customView":"","dividerHeight":1,"enabled":1,"firstDayOfWeek":1,"id":"_fab","image":{"rotate":0,"scaleType":"CENTER"},"indeterminate":"false","index":0,"inject":"","layout":{"backgroundColor":16777215,"borderColor":-16740915,"gravity"}
{"adSize":"","adUnitId":"","alpha":1.0,"checked":0,"choiceMode":0,"clickable":1,"convert":"","customView":"","dividerHeight":1,"enabled":1,"firstDayOfWeek":1,"id":"_fab","image":{"rotate":0,"scaleType":"CENTER"},"indeterminate":"false","index":0,"inject":"","layout":{"backgroundColor":16777215,"borderColor":-16740915,"gravity"}


@main.xml_fab
{"adSize":"","adUnitId":"","alpha":1.0,"checked":0,"choiceMode":0,"clickable":1,"convert":"","customView":"","dividerHeight":1,"enabled":1,"firstDayOfWeek":1,"id":"_fab","image":{"rotate":0,"scaleType":"CENTER"},"indeterminate":"false","index":0,"inject":"","layout":{"backgroundColor":16777215,"borderColor":-16740915,"gravity"}
{"adSize":"","adUnitId":"","alpha":1.0,"checked":0,"choiceMode":0,"clickable":1,"convert":"","customView":"","dividerHeight":1,"enabled":1,"firstDayOfWeek":1,"id":"_fab","image":{"rotate":0,"scaleType":"CENTER"},"indeterminate":"false","index":0,"inject":"","layout":{"backgroundColor":16777215,"borderColor":-16740915,"gravity"}
{"adSize":"","adUnitId":"","alpha":1.0,"checked":0,"choiceMode":0,"clickable":1,"convert":"","customView":"","dividerHeight":1,"enabled":1,"@firstDayOfWeek":1,"id":"_fab","image":{"rotate":0,"scaleType":"CENTER"},"indeterminate":"false","index":0,"inject":"","layout":{"backgroundColor":16777215,"borderColor":-16740915,"gravity"}


@main.xml
{"adSize":"","adUnitId":"","alpha":1.0,"checked":0,"choiceMode":0,"clickable":1,"convert":"","customView":"","dividerHeight":1,"enabled":1,"firstDayOfWeek":1,"id":"_fab","image":{"rotate":0,"scaleType":"CENTER"},"indeterminate":"false","index":0,"inject":"","layout":{"backgroundColor":16777215,"borderColor":-16740915,"gravity"}
{"adSize":"","adUnitId":"","alpha":1.0,"checked":0,"choiceMode":0,"clickable":1,"convert":"","customView":"","dividerHeight":1,"enabled":1,"firstDayOfWeek":1,"id":"_fab","image":{"rotate":0,"scaleType":"CENTER"},"indeterminate":"false","index":0,"inject":"","layout":{"backgroundColor":16777215,"borderColor":-16740915,"gravity"}

j
@main.xml_fab
{"adSize":"","adUnitId":"","alpha":1.0,"checked":0,"choiceMode":0,"clickable":1,"convert":"","customView":"","dividerHeight":1,"enabled":1,"firstDayOfWeek":1,"id":"_fab","image":{"rotate":0,"scaleType":"CENTER"},"indeterminate":"false","index":0,"inject":"","layout":{"backgroundColor":16777215,"borderColor":-16740915,"gravity"}
{"adSize":"","adUnitId":"","alpha":1.0,"checked":0,"choiceMode":0,"clickable":1,"convert":"","customView":"","dividerHeight":1,"enabled":1,"firstDayOfWeek":1,"id":"_fab","image":{"rotate":0,"scaleType":"center"},"indeterminate":"false","index":0,"inject":"","layout":{"backgroundColor":16777215,"borderColor":-16740915,"gravity"}
{"adSize":"","adUnitId":"","alpha":1.0,"checked":0,"choiceMode":0,"clickable":1,"convert":"","customView":"","dividerHeight":1,"enabled":1,"firstDayOfWeek":1,"id":"_fab","image":{"rotate":0,"scaleType":"CENTER"},"indeterminate":"false","index":0,"inject":"","layout":{"backgroundColor":16777215,"borderColor":-16740915,"gravity"}
`
const pattern = /^@.*?(?=\n^@|\Z)/ms
const result = testText.match(pattern)
// result即为4条独立的匹配片段

问题示意 #

内容的提问来源于stack exchange，提问作者Hasni