Question

这是我倾向于实现的示例输入和输出格式。我在使用regex在线拆分的几个解决方案的工作，但它不满足所有条件。希望有人能提供帮助。我需要一个正则表达式分裂解决方案。请不要建议图书馆。谢谢。

List<string> values = new List<string>();
Regex lineSplit = new Regex("(?:^|,)(\"(?:[^\"]+|\"\")*\"|[^,]*)", RegexOptions.Compiled);
foreach (Match match in lineSplit.Matches(line))
{
  values.Add(match.Value.TrimStart(',').Replace("\"", ""));
}

"123","456","789"
123
456
789

"123"","456","789"
123"
456
789

"123"2","456","789"
123"2
456
789

"123",2","456","789"
123",2
456
789

"123","2","456","789"
123
2
456
789

Answer 1

如果还考虑了非正则表达式方法，我建议删除初始和尾随引号（例如.Substring(1, s.Length - 2)或.Trim('"')），然后用{{1}分割字符串}：

使用

","

请参阅C# demo：

var elements = line.Substring(1, s.Length - 2).Split(new[] {"\",\""}, StringSplitOptions.None))

输出：

var s = "\"123\",\"456\",\"789\"";
Console.WriteLine(String.Join("|", s.Substring(1, s.Length - 2).Split(new[] {"\",\""}, StringSplitOptions.None)));
s = "\"123\"\",\"456\",\"789\"";
Console.WriteLine(String.Join("|", s.Substring(1, s.Length - 2).Split(new[] {"\",\""}, StringSplitOptions.None)));
s = "\"123\"2\",\"456\",\"789\"";
Console.WriteLine(String.Join("|", s.Substring(1, s.Length - 2).Split(new[] {"\",\""}, StringSplitOptions.None)));
s = "\"123\",2\",\"456\",\"789\"";
Console.WriteLine(String.Join("|", s.Substring(1, s.Length - 2).Split(new[] {"\",\""}, StringSplitOptions.None)));
s = "\"123\",\"2\",\"456\",\"789\"";
Console.WriteLine(String.Join("|", s.Substring(1, s.Length - 2).Split(new[] {"\",\""}, StringSplitOptions.None)));

Answer 2

你可以尝试这样的正则表达式：

(?<=^"|,").*?(?=","|"$)

解释

(?<=^"|,") # positive lookbehind: one quote with comma before or at the start .*? # match everything returning at first match (?=","|"$) # positive lookahead: one quote with comma and quote after or at the end

Regex live here.

希望它有所帮助。

正则表达式拆分双引号括起来的逗号分隔符值

2 个答案: