duanqinqian5299 2016-03-12 18:14
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如何使用golang将HTML表转换为数组

I'm having a problem trying to convert an HTML table into a Golang array. I've tried to achieve it using x/net/html and goquery, without any success on both of them.

Let's say we have this HTML table:

<html>
  <body>
    <table>
      <tr>
        <td>Row 1, Content 1<td>
        <td>Row 1, Content 2<td>
        <td>Row 1, Content 3<td>
        <td>Row 1, Content 4<td>
      </tr>
      <tr>
        <td>Row 2, Content 1<td>
        <td>Row 2, Content 2<td>
        <td>Row 2, Content 3<td>
        <td>Row 2, Content 4<td>
      </tr>
    </table>
  </body>
</html>

And I'd like to end up with this array:

------------------------------------
|Row 1, Content 1| Row 1, Content 2|
------------------------------------
|Row 2, Content 1| Row 2, Content 2|
------------------------------------

As you guy can see, I'm just ignoring Contents 3 and 4.

My extraction code:

func extractValue(content []byte) {
  doc, _ := goquery.NewDocumentFromReader(bytes.NewReader(content))

  doc.Find("table tr td").Each(func(i int, td *goquery.Selection) {
    // ...
  })
}

I've tried to add a controller number which would be responsible for ignoring the <td> that I don't want to convert and calling

td.NextAll()

but with no luck. Do you guys have any idea of what should I do to accomplish it?

Thanks.

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2条回答 默认 最新

  • doujiazong0322 2016-03-12 22:38
    关注

    You can get away with package golang.org/x/net/html only. 

    var body = strings.NewReader(`                                                                                                                            
        <html>                                                                                                                                            
        <body>                                                                                                                                            
        <table>                                                                                                                                           
        <tr>                                                                                                                                              
        <td>Row 1, Content 1<td>                                                                                                                          
        <td>Row 1, Content 2<td>                                                                                                                          
        <td>Row 1, Content 3<td>                                                                                                                          
        <td>Row 1, Content 4<td>                                                                                                                          
        </tr>                                                                                                                                             
        <tr>                                                                                                                                              
        <td>Row 2, Content 1<td>                                                                                                        
        <td>Row 2, Content 2<td>                                                                                                                          
        <td>Row 2, Content 3<td>                                                                                                                          
        <td>Row 2, Content 4<td>                                                                                                                          
        </tr>  
        </table>                                                                                                                                          
        </body>                                                                                                                                           
        </html>`)          

func main() {
    z := html.NewTokenizer(body)
    content := []string{}

    // While have not hit the </html> tag
    for z.Token().Data != "html" {
        tt := z.Next()
        if tt == html.StartTagToken {
            t := z.Token()
            if t.Data == "td" {
                inner := z.Next()
                if inner == html.TextToken {
                    text := (string)(z.Text())
                    t := strings.TrimSpace(text)
                    content = append(content, t)
                }
            }
        }
    }
    // Print to check the slice's content
    fmt.Println(content)
}

    This code is written only for this typical HTML pattern only, but refactoring it to be more general wouldn't be hard.

    本回答被题主选为最佳回答 , 对您是否有帮助呢?
    评论
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