我不确定regex是最好的工具。当您使用json时，最好使用json专用工具。
例如，如果您可以访问jq这样的工具，您可以使用例如。

jq '.animal == "dog" and .fish == "tuna"'

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键值对在json中出现的顺序在这里并不重要。
查看输入数据，上面的查询将返回true：

echo '{"color":"red","animal":"dog","drink":"water","food":"pizza","fish":"tuna","foo":"bar"}' | jq '.animal == "dog" and .fish == "tuna"'
# true

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如果有一个键值对缺失或不正确，您将收到false：

echo '{"color":"red","animal":"cat","drink":"water","food":"pizza","fish":"tuna","foo":"bar"}' | jq '.animal == "dog" and .fish == "tuna"'
# false

echo '{"color":"red","animal":"dog","drink":"water","food":"pizza","pet":"tuna","foo":"bar"}' | jq '.animal == "dog" and .fish == "tuna"'
# false

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我注意到你已经问过其他关于Python的问题，所以如果你想要一个Python的解决方案，它可以像把你的json转换成dict一样简单，然后检查键值对的存在：

import json

data = json.loads('{"color":"red","animal":"dog","drink":"water","food":"pizza","fish":"tuna","foo":"bar"}')

data["animal"] == "dog" and data["fish"] == "tuna"

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如果你完全决定使用正则表达式（我真的不认为这是一个好的选择，但最终它是你的决定），你 * 可以 * 简单地使用|来检查两个可能的顺序，例如，

^.*(("animal":"dog").*("fish":"tuna")|("fish":"tuna").*("animal":"dog")).*$

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https://regex101.com/r/qxvJu2/1的

请用这个。它可能对你有帮助

const jsonString1 = '{"color":"red","animal":"dog","drink":"water","food":"pizza","fish":"tuna","foo":"bar"}';
const jsonString2 = '{"color":"red","drink":"water","food":"pizza","fish":"tuna","foo":"bar","animal":"dog"}';

const regex = /^(?=.*\b"animal":"dog"\b)(?=.*\b"fish":"tuna"\b).*/;

console.log(regex.test(jsonString1)); // Output: true
console.log(regex.test(jsonString2)); // Output: true

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