正则表达式匹配实现

直接上代码

using Microsoft.AspNetCore.Mvc;
using System.Text.RegularExpressions;namespace SaaS.OfficialWebSite.Web.Controllers
{public class RegController : Controller{public IActionResult Index(){return View();}[HttpPost]public IActionResult TestRegex([FromBody] RegexTestRequest request){if (request == null || string.IsNullOrEmpty(request.Pattern) || string.IsNullOrEmpty(request.Text)){return BadRequest(new { message = "正则表达式模式和测试文本不能为空" });}try{var options = RegexOptions.None;if (request.Options.IgnoreCase)options |= RegexOptions.IgnoreCase;if (request.Options.Multiline)options |= RegexOptions.Multiline;if (request.Options.Singleline)options |= RegexOptions.Singleline;if (request.Options.ExplicitCapture)options |= RegexOptions.ExplicitCapture;var regex = new Regex(request.Pattern, options);var matches = regex.Matches(request.Text);var response = new RegexTestResponse{IsMatch = matches.Count > 0,Matches = new List<MatchResult>()};foreach (Match match in matches){var matchResult = new MatchResult{Value = match.Value,Index = match.Index,Length = match.Length,Groups = new List<GroupResult>()};// 跳过第一个组（整个匹配）for (int i = 1; i < match.Groups.Count; i++){var group = match.Groups[i];if (group.Success){matchResult.Groups.Add(new GroupResult{Name = regex.GroupNameFromNumber(i),Value = group.Value,Index = group.Index,Length = group.Length});}}response.Matches.Add(matchResult);}return Ok(response);}catch (ArgumentException ex){return BadRequest(new { message = $"无效的正则表达式: {ex.Message}" });}catch (Exception ex){return StatusCode(500, new { message = $"发生错误: {ex.Message}" });}}}public class RegexTestRequest{public string Pattern { get; set; }public string Text { get; set; }public RegexOptionsDto Options { get; set; }}public class RegexOptionsDto{public bool IgnoreCase { get; set; }public bool Multiline { get; set; }public bool Singleline { get; set; }public bool ExplicitCapture { get; set; }}public class RegexTestResponse{public bool IsMatch { get; set; }public List<MatchResult> Matches { get; set; }}public class MatchResult{public string Value { get; set; }public int Index { get; set; }public int Length { get; set; }public List<GroupResult> Groups { get; set; }}public class GroupResult{public string Name { get; set; }public string Value { get; set; }public int Index { get; set; }public int Length { get; set; }}
}

运行效果：正则表达式匹配