正則表達式\\ n不起作用

Question

我正在嘗試從兩行HTML中解析文本。

Dim PattStats As New Regex("class=""head"">(.+?)</td>"+ 
                           "\n<td>(.+?)</td>")
Dim makor As MatchCollection = PattStats.Matches(page)

For Each MatchMak As Match In makor
    ListView3.Items.Add(MatchMak.Groups(1).Value)
Next

我添加了\\n來匹配下一行，但是由於某種原因，它不起作用。 這是我運行正則表達式的源。

<table class="table table-striped table-bordered table-condensed">
  <tbody>
    <tr>
      <td class="head">Health Points:</td>
      <td>445 (+85 / per level)</td>
      <td class="head">Health Regen:</td>
      <td>7.25</td>
    </tr>
    <tr>
      <td class="head">Energy:</td>
      <td>200</td>
      <td class="head">Energy Regen:</td>
      <td>50</td>
    </tr>
    <tr>
      <td class="head">Damage:</td>
      <td>53 (+3.2 / per level)</td>
      <td class="head">Attack Speed:</td>
      <td>0.694 (+3.1 / per level)</td>
    </tr>           
    <tr>
      <td class="head">Attack Range:</td>
      <td>125</td>
      <td class="head">Movement Speed:</td>
      <td>325</td>
    </tr>
    <tr>
      <td class="head">Armor:</td>
      <td>16.5 (+3.5 / per level)</td>
      <td class="head">Magic Resistance:</td>
      <td>30 (+1.25 / per level)</td>
    </tr>       
    <tr>
      <td class="head">Influence Points (IP):</td>
      <td>3150</td>
      <td class="head">Riot Points (RP):</td>
      <td>975</td>
    </tr>
  </tbody>
</table>

我想在一個正則表達式中匹配第一個<td class...>和下一行：/

Answer 1

描述

此正則表達式將查找td標簽，並以兩個為一組的方式返回它們。

<td\\b[^>]*>([^<]*)<\\/td>[^<]*<td\\b[^>]*>([^<]*)<\\/td>

摘要

• <td\\b[^>]*>找到第一個td標簽並使用任何屬性
• ([^<]*)捕獲第一個內部文本，這可能很貪心，但是我們假設該單元格沒有嵌套標簽
• <\\/td>查找關閉標簽
• [^<]*移動到文本的所有其余部分，直到您為止，這假設第一個和第二個td標簽之間沒有其他標簽
• <td\\b[^>]*>找到第二個td tage並使用任何屬性
• ([^<]*)捕獲第二個內部文本，這可能很貪心，但是我們假設該單元格沒有嵌套標簽
• <\\/td>查找關閉標簽

組

組0將獲取整個字符串

1. 將有第一個TD組
2. 將有第二個TD組

VB.NET代碼示例：

Imports System.Text.RegularExpressions
Module Module1
  Sub Main()
    Dim sourcestring as String = "replace with your source string"
    Dim re As Regex = New Regex("<td\b[^>]*>([^<]*)<\/td>[^<]*<td\b[^>]*>([^<]*)<\/td>",RegexOptions.IgnoreCase OR RegexOptions.Singleline)
    Dim mc as MatchCollection = re.Matches(sourcestring)
    Dim mIdx as Integer = 0
    For each m as Match in mc
      For groupIdx As Integer = 0 To m.Groups.Count - 1
        Console.WriteLine("[{0}][{1}] = {2}", mIdx, re.GetGroupNames(groupIdx), m.Groups(groupIdx).Value)
      Next
      mIdx=mIdx+1
    Next
  End Sub
End Module

$matches Array:
(
    [0] => Array
        (
            [0] => <td class="head">Health Points:</td>
          <td>445 (+85 / per level)</td>
            [1] => <td class="head">Health Regen:</td>
          <td>7.25</td>
            [2] => <td class="head">Energy:</td>
          <td>200</td>
            [3] => <td class="head">Energy Regen:</td>
          <td>50</td>
            [4] => <td class="head">Damage:</td>
          <td>53 (+3.2 / per level)</td>
            [5] => <td class="head">Attack Speed:</td>
          <td>0.694 (+3.1 / per level)</td>
            [6] => <td class="head">Attack Range:</td>
          <td>125</td>
            [7] => <td class="head">Movement Speed:</td>
          <td>325</td>
            [8] => <td class="head">Armor:</td>
          <td>16.5 (+3.5 / per level)</td>
            [9] => <td class="head">Magic Resistance:</td>
          <td>30 (+1.25 / per level)</td>
            [10] => <td class="head">Influence Points (IP):</td>
          <td>3150</td>
            [11] => <td class="head">Riot Points (RP):</td>
          <td>975</td>
        )

    [1] => Array
        (
            [0] => Health Points:
            [1] => Health Regen:
            [2] => Energy:
            [3] => Energy Regen:
            [4] => Damage:
            [5] => Attack Speed:
            [6] => Attack Range:
            [7] => Movement Speed:
            [8] => Armor:
            [9] => Magic Resistance:
            [10] => Influence Points (IP):
            [11] => Riot Points (RP):
        )

    [2] => Array
        (
            [0] => 445 (+85 / per level)
            [1] => 7.25
            [2] => 200
            [3] => 50
            [4] => 53 (+3.2 / per level)
            [5] => 0.694 (+3.1 / per level)
            [6] => 125
            [7] => 325
            [8] => 16.5 (+3.5 / per level)
            [9] => 30 (+1.25 / per level)
            [10] => 3150
            [11] => 975
        )

)

放棄

用正則表達式解析html確實不是最好的解決方案，因為存在大量無法預料的邊緣情況。 但是，在這種情況下，如果輸入字符串始終是基本字符串，並且您願意接受正則表達式無法100％正常工作的風險，則此解決方案可能對您有用。