如何从字符串中获取json？

Question

我有这个字符串：

"var block = new MatchesBlock('page_competition_1_block_competition_matches_summary_5', 'block_competition_matches_summary', {"page":0,"bookmaker_urls":{"13":[{"link":"http:\/\/www.bet365.com\/home\/?affiliate=365_178981","name":"Bet 365"}]},"block_service_id":"competition_summary_block_competitionmatchessummary","round_id":42011,"outgroup":false,"view":2,"competition_id":13});"

我想得到：

{"page":0,"bookmaker_urls":{"13":[{"link":"http:\/\/www.bet365.com\/home\/?affiliate=365_178981","name":"Bet 365"}]},"block_service_id":"competition_summary_block_competitionmatchessummary","round_id":42011,"outgroup":false,"view":2,"competition_id":13}

所以我写道：

MatchesBlock\(([^)]+)\)

但这会占用MatchesBlock

中的所有字符串

Answer 1

您可以使用默认情况下正则表达式贪婪并使用

的事实

MatchesBlock[^\{]+\K(.*})

我在这里使用\K重置匹配，即不会捕获\K之前的任何内容。

Answer 2

如果您只想从MatchesBlock构造函数参数中提取JSON，只需使用以下正则表达式：

\{(?:[^{}]|(?R))*\}

输入：

var block = new MatchesBlock('page_competition_1_block_competition_matches_summary_5', 'block_competition_matches_summary', {"page":0,"bookmaker_urls":{"13":[{"link":"http:\/\/www.bet365.com\/home\/?affiliate=365_178981","name":"Bet 365"}]},"block_service_id":"competition_summary_block_competitionmatchessummary","round_id":42011,"outgroup":false,"view":2,"competition_id":13});

输出：

{"page":0,"bookmaker_urls":{"13":[{"link":"http:\/\/www.bet365.com\/home\/?affiliate=365_178981","name":"Bet 365"}]},"block_service_id":"competition_summary_block_competitionmatchessummary","round_id":42011,"outgroup":false,"view":2,"competition_id":13}

Answer 3

对于提供的示例，您可以使用：

{[^)]+

Demo