如果其中一个段匹配，我怎么能匹配整个正则表达式？

Question

例如，我想在这里匹配_msg对象：

{"message":{"_id":"","_obj":"","_obj_type":"1","_type":"ERROR","_msg":"An error has occurred!","_user":"","_added":"","_func":"Document Uploaded","_action":""}, "data":[]}

但不在这里：

{"message":{"_id":"","_obj":"","_obj_type":"1","_type":"ERROR","_msg":"","_user":"","_added":"","_func":"Document Uploaded","_action":""}, "data":[]}

因为要显示实际消息。这是我尝试的正则表达式：

"_msg"\:"([^"]*){1,}"

然而，它仍然匹配一个空的_msg，我不想要。我甚至关闭了吗？任何帮助将不胜感激。

Answer 1

使用JSON解析器要容易得多，但*表示（零或更多）。使用+（一个或多个）。

"_msg":"([^"]+)"

是空字符串匹配(anything)*{1,}