正则表达式替换table表格中的样式与空标记(保留

网络编程 2021-07-05 10:07www.168986.cn编程入门
最近几天的劳动成果,用正则表达式去除表格中的样式与class方便后台编辑的操作,在编写过程中不断进步,后续将不定时更新,需要的朋友可以参考下

完整测试代码

<script>
var str='<p>';
str='<table id="tblSort" cellspacing="0" helvetica="" sans=""><tr id="sdf"><td style="color:red" class="ok" colspan="8" height="500" rowspan="5">';
str+='<td style = "color:blue" style="color:blue" colspan="8" style="color:red" rowspan="5">';
str+='<td id="asdfj" class="dbclick"><span id="s159015" class="p_check"><a style="text-decoration: none; color: rgb(0,136,255)" href="http://.17ce./site/dns/20200408_3875c5d0799211eab8bc2bbb7b33a12c:1.html#s159015" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >GET</a> <a style="text-decoration: none; color: rgb(0,136,255)" href="http://.17ce./site/dns/20200408_3875c5d0799211eab8bc2bbb7b33a12c:1.html#s159015" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >PING</a> <a style="text-decoration: none; color: rgb(0,136,255)" href="http://.17ce./site/dns/20200408_3875c5d0799211eab8bc2bbb7b33a12c:1.html#s159015" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >Trace</a> <a style="text-decoration: none; color: rgb(0,136,255)" href="http://.17ce./site/dns/20200408_3875c5d0799211eab8bc2bbb7b33a12c:1.html#s159015" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >Dig</a></span></td>';
str+='<td class="sdf" colspan="8" style="color:red" rowspan="5"><p style="color:red">jb51.</p></td>';
str+='<td class="sdf" colspan="8" style="color:red" rowspan="5" width="100"></td></tr></table>';

str+='<table><tr style = "color:bluefffffffffffffffffffffffffffffffffffffffffff"><td style="color:green" class="ok" colspan="8" height="500" rowspan="5">';
str+='<tr id="trinfo146798" class="alt">   <td id="tdinfo146798" colspan="16"></td>  </tr>';
str+='<td id="asdfj" class="dbclick"><span id="s159015" class="p_check"><a style="text-decoration: none; color: rgb(0,136,255)" href="http://.17ce./site/dns/20200408_3875c5d0799211eab8bc2bbb7b33a12c:1.html#s159015" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >GET</a> <a style="text-decoration: none; color: rgb(0,136,255)" href="http://.17ce./site/dns/20200408_3875c5d0799211eab8bc2bbb7b33a12c:1.html#s159015" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >PING</a> <a style="text-decoration: none; color: rgb(0,136,255)" href="http://.17ce./site/dns/20200408_3875c5d0799211eab8bc2bbb7b33a12c:1.html#s159015" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >Trace</a> <a style="text-decoration: none; color: rgb(0,136,255)" href="http://.17ce./site/dns/20200408_3875c5d0799211eab8bc2bbb7b33a12c:1.html#s159015" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >Dig</a></span></td>';
str+='<td class="sdf" colspan="8" style="color:red" rowspan="5"><p style="color:red">jb51.</p></td>';
str+='<td class="sdf" colspan="8" style="color:red" rowspan="5" width="100"> <font color="#0f0000">122.227.189.106 [中国浙江宁波电信]</font><br /></td></tr></table>';

str+='<p><img alt="" src="//img.jbzj./file_images/article/202004/2020041112113912.png" /></p>';
str+='<p>选择安装然后选择全新的sql server独立安装</p>';
str+='<p><img alt="" src="//img.jbzj./file_images/article/202004/2020041112113913.png" /></p>';

console.log(str);

//去除table的宽度
str=str.replace(/<table[^>]>/ig, "<table>");
str=str.replace(/<table[^>]>[\s\S]?<\/table>/gi,function(match,capture){
match=match.replace(/(style|class|id)[\s]=[\s]("|')[^<>"']?\2/gi,'');
match=match.replace(/<\/?span[^<>]>/gi,'');
match=match.replace(/<p [^<>]>|<\/p>/gi,'');
match=match.replace(/<font[^<>]>|<\/font>/gi,'');
return match;
});

//alert(str);
console.log(str);
</script>

原来的代码是这样的

//普通替换
function doRepNormal(s){
var str=s.replace(/<p><br type="_moz">\s?<\/p>/ig,"");
str=str.replace(/<p>\s?<br type="_moz">\s?<\/p>/ig, "");
str=str.replace(/<p>(\s|\&nbsp\;| | |\xc2\xa0)?<\/p>/ig, "");
str=str.replace(/<p>\s?<\/p>/ig,"");
str=str.replace(/<p>&nbsp;<\/p>/ig,"");
str=str.replace(/<br type="_moz">\n&nbsp;<\/p>/ig, "</p>");
str=str.replace(/<br type="_moz">\s?<\/p>/ig, "</p>");
str=str.replace(/<br\s?\/?>\s?<\/p>/ig, "</p>");
str=str.replace(/<br \/>\n&nbsp;<\/p>/ig, "</p>");
str=str.replace(/<br>\n&nbsp;<\/p>/ig, "</p>");
//表格替换 
str=str.replace(/<table[^>]>/ig, "<table>");
str=str.replace(/<table[^>]>[\s\S]?<\/table>/gi,function(match,capture){
match=match.replace(/style[\s]=[\s]("|')[^<>"']?\1/gi,'');
match=match.replace(/cl\ass[\s]=[\s]("|')[^<>"']?\1/gi,'');
match=match.replace(/id[\s]=[\s]("|')[^<>"']?\1/gi,'');
match=match.replace(/<font[^<>]>|<\/font>/gi,'');
return match;
});
str=str.replace(/<td[^>]>/gi,function(match,capture){
match=match.replace(/style[\s]=[\s]("|')[^<>"']?\1/gi,'');
match=match.replace(/cl\ass[\s]=[\s]("|')[^<>"']?\1/gi,'');
match=match.replace(/id[\s]=[\s]("|')[^<>"']?\1/gi,'');
return match;
});
return str;
}

后台修改成这样的

str=str.replace(/<table[^>]>/ig, "<table>");
str=str.replace(/<table[^>]>[\s\S]?<\/table>/gi,function(match,capture){
match=match.replace(/(style|class|id)[\s]=[\s]("|')[^<>"']?\2/gi,'');
match=match.replace(/<\/?span[^<>]>/gi,'');
match=match.replace(/<p [^<>]>|<\/p>/gi,'');
match=match.replace(/<font[^<>]>|<\/font>/gi,'');
return match;
});

经过测试发现chrome中正常,但在ie8与ie7中有bug无法实现class与id的替换,文档声明<!DOCTYPE html>都会影响一些结果,真是涨了见识

正好看到别的人分享的先留存一份,后续更新

用正则表达式取出table中的所有行(支持嵌套table)

此是通过csdn询问得高人之手写的。
谢谢gzdiablo

表达式:

<tr[^>]>(?:(?:\s|\S)?(?=<table|</tr>)(?(<table)<table[^>]>(?:\s|\S)?(?:</table>|(?:(?:<table[^>]>(?:\s|\S)?</table>(?:\s|\S)?)?</table>))(?:\s|\S)?|))</tr>

一条表达式就可以获取你想要的
写得好辛苦
测试:

<table width="300" border="1" cellspacing="0" cellpadding="0">
 <tr>
 <td>&nbsp;</td>
 <td><table width="100%" border="1" cellspacing="0" cellpadding="0">
  <tr>
  <td>&nbsp;</td>
  </tr>

 </table>
  <table width="100%" border="1" cellspacing="0" cellpadding="0">
  <tr>
   <td>&nbsp;</td>
  </tr>
  </table></td>
 <td>&nbsp;</td>
 </tr>
 <tr>
 <td>&nbsp;</td>
 <td>&nbsp;</td>
 <td><table width="100%" border="1" cellspacing="0" cellpadding="0">

  <tr>
  <td>&nbsp;</td>
  </tr>
 </table></td>
 </tr>
 <tr>
 <td><table width="100%" border="1" cellspacing="0" cellpadding="0">
  <tr>
  <td>&nbsp;</td>
  </tr>

 </table></td>
 <td>&nbsp;</td>
 <td>&nbsp;</td>
 </tr>
</table>

-------------------获取3个match

============================================match1
  <tr>
    <td>&nbsp;</td>
    <td><table width="100%" border="1" cellspacing="0" cellpadding="0">
      <tr>
        <td>&nbsp;</td>
        </tr>

    </table>
      <table width="100%" border="1" cellspacing="0" cellpadding="0">
        <tr>
          <td>&nbsp;</td>
        </tr>
      </table></td>
    <td>&nbsp;</td>
  </tr>
==============================================match2
  <tr>
    <td>&nbsp;</td>
    <td>&nbsp;</td>
    <td><table width="100%" border="1" cellspacing="0" cellpadding="0">

      <tr>
        <td>&nbsp;</td>
        </tr>
    </table></td>
  </tr>
==============================================match3
  <tr>
    <td><table width="100%" border="1" cellspacing="0" cellpadding="0">
      <tr>
        <td>&nbsp;</td>
        </tr>

    </table></td>
    <td>&nbsp;</td>
    <td>&nbsp;</td>
  </tr>

正则表达式匹配html标签table

,要匹配任意内容“.”是不行的,因为不匹配“\n”,取不到想要的内容,所以有了如下表达式
    [\s\S]

,你也可以用 “[\d\D]”、“[\w\W]” 来表示。

现在我们来匹配一个html标签,匹配table如下

<table.?>[\s\S]<\/table>

<table.?>[\s\S]?<\/table>

以上两个表达式,一个加了"?"和一个却不加“?”,那么这有什么区别呢?
我们知道“?”在正则表达式里是一个通配符匹配前面的子表达式零次或一次,或指明一个非贪婪限定符。

在这里,通过测试,我们得出这样的结论在不加“?”的情况下,在匹配狼蚁网站SEO优化一段内容的时候

<table>这是第一个table</table>
我不是table里的内容
<table>这是第二个table</table>
我也不是table里的内容
<table>这是第三个table</table>

会把以<table>开始,</table>结束的内容都匹配出来

加了“?”之后,只匹配第n个匹配的内容

完整测试代码狼蚁SEO长沙网络推广提供

<script>
var str='<table>这是第一个table</table>';
str+='我不是table里的内容';
str+='<table>这是第二个table</table>';
str+='我也不是table里的内容';
str+='<table>这是第三个table</table>';

var reg1 = /<table.?>[\s\S]<\/table>/gi;
var res1 = str.match(reg1);
console.log(res1) 
var reg2 = /<table.?>[\s\S]?<\/table>/gi;
var res2 = str.match(reg2);
console.log(res2) 
</script>

效果图

以上就是正则表达式替换table表格中的样式与空标记(保留rowspan与colspan)的详细内容,更多关于正则表达式替换table表格的资料请关注狼蚁SEO其它相关文章!

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