Question

给出以下多行字符串：

WHERE ([EXTENT1].[MY_ID] IN (151,152,214,218,931,932,933,1067,1412,1414,13807,14347,14349,14446)) AND ([EXTENT1].[MY_OTHER_ID] IN (14264, 14335, 14385, 14398, 14603, 14650, 15164, 15374)) AND ([EXTENT2].[PERSON_ID] IN (28,933,14446,179,152,14349,14347,933,130,218,933,1067,931,151,214,152,933,145,931,145,5809,14347,14349,14349,1414,142,1412,179,152,14347,152,90,13807,932,931))
    )  AS [FILTER1]
    GROUP BY [K1], [K2]
)  AS [GROUPBY1]

我想为[MY_ID]提取IN子句的带括号的值。我可以使用以下正则表达式(?<=\.\[MY_ID\].*IN.*\().*来截断字符串的第一部分并返回：

 151,152,214,218,931,932,933,1067,1412,1414,13807,14347,14349,14446)) AND ([EXTENT1].[MY_OTHER_ID] IN (14264, 14335, 14385, 14398, 14603, 14650, 15164, 15374)) AND ([EXTENT2].[PERSON_ID] IN (28,933,14446,179,152,14349,14347,933,130,218,933,1067,931,151,214,152,933,145,931,145,5809,14347,14349,14349,1414,142,1412,179,152,14347,152,90,13807,932,931))

但我无法弄清楚如何让它在第一次结束时停止。）

我所追求的是：151,152,214,218,931,932,933,1067,1412,1414,13807,14347,14349,14446

正则表达式最终将与.NET正则表达式引擎一起使用。

Answer 1

尝试使用以下正则表达式。

正则表达式： (?<=\[MY_ID\] IN \()[^)]*

<强>解释

(?<=\[MY_ID\] IN \()将look behind [MY_ID] IN (
[^)]*将匹配所有内容，直至满足)，这标志着括号的结束。

<强> Regex101 Demo

Answer 2

由于.NET正则表达式支持重复的组，您可以使用

\.\[MY_ID]\s*IN\s*\(((?:,?(\d+))+)

并获取Group 1值（将为151,152,214,218,931,932,933,1067,1412,1414,13807,14347,14349,14446）或将Group 2捕获集合中的所有捕获作为数组/列表。

请参阅regex demo

说明：

\.\[MY_ID] - 文字.[MY_ID]
\s* - 0+空白
IN\s* - IN字后跟0 +空格
\( - 打开文字(
((?:,?(\d+))+) - 第1组捕获1+序列：
- ,? - 一个或零逗号
- (\d+) - 第2组捕获1位数字。

这是一个C# demo：

var s = "WHERE ([EXTENT1].[MY_ID] IN (151,152,214,218,931,932,933,1067,1412,1414,13807,14347,14349,14446)) AND ([EXTENT1].[MY_OTHER_ID] IN (14264, 14335, 14385, 14398, 14603, 14650, 15164, 15374)) AND ([EXTENT2].[PERSON_ID] IN (28,933,14446,179,152,14349,14347,933,130,218,933,1067,931,151,214,152,933,145,931,145,5809,14347,14349,14349,1414,142,1412,179,152,14347,152,90,13807,932,931))\n    )  AS [FILTER1]\n    GROUP BY [K1], [K2]\n)  AS [GROUPBY1]"; 
var pattern = @"\.\[MY_ID]\s*IN\s*\(((?:,?(\d+))+)";
var matches = Regex.Matches(s, pattern);
var res1 = matches
                .Cast<Match>().Select(p => p.Groups[2].Captures) // Get a list of ind. numbers
                .ToList();
var res2 = matches
                .Cast<Match>().Select(p => p.Groups[1].Value) // Get the whole substring
                .ToList();
 foreach (var coll in res1)
    foreach (var v in coll)
        Console.WriteLine(v);
 Console.WriteLine("Ex. 2");
    foreach (var v2 in res2)
        Console.WriteLine(v2);

提取从特定字符串开始直到某个字符串的值

2 个答案: