I'm trying to parse a html page and extract 2 values from a table row. The html for the table row is as follows: -
我正在尝试解析html页面并从表格行中提取2个值。表行的html如下: -
<tr>
<td title="Associated temperature in (ºC)" class="TABLEDATACELL" nowrap="nowrap" align="Left" colspan="1" rowspan="1">Max Temperature (ºC)</td>
<td class="TABLEDATACELLNOTT" nowrap="nowrap" align="Center" colspan="1" rowspan="1">6</td>
<td class="TABLEDATACELLNOTT" nowrap="nowrap" align="Center" colspan="1" rowspan="1"> 13:41:30</td>
</tr>
and the expression I have at the moment is:
而我现在的表达是:
<tr>[\s]<td[^<]+?>Max Temperature[\w\s]*</td>[\s]
<td[^<]+?>(?<value>([\d]+))</td>[\s]
<td[^<]+?>(?<time>([\d\:]+))</td>[\s]</tr>
However I don't seem to be able to extract any matches. Could anyone point me in the right direction, thanks.
但是我似乎无法提取任何匹配项。任何人都可以指出我正确的方向,谢谢。
7 个解决方案
#1
1
Try
<tr>\s*
<td[^>]*>.*?</td>\s*
<td[^>]*>\s*(?<value>\d+)\s*</td>\s*
<td[^>]*>\s*(?<time>\d{2}:\d{2}:\d{2})\s*</td>\s*
</tr>\s*
#2
4
Parsing HTML reliably using regexp is known to be notoriously difficult.
众所周知,使用regexp可靠地解析HTML是非常困难的。
I think I would be looking for a HTML parsing library, or a "screen scraping" library ;)
我想我会寻找一个HTML解析库,或“屏幕抓取”库;)
If the HTML comes from an unreliable source, you have to be extra careful to handle malicious HTML syntax well. Bad HTML handling is a major source of security attacks.
如果HTML来自不可靠的源,则必须格外小心处理恶意HTML语法。糟糕的HTML处理是安全攻击的主要来源。
#3
0
When you write <td[^<]+?> I guess you really mean <td[^>]*>
当你写我猜你真的是指] *>
That is "opening brace, td, maybe stuff other than closing brace..."
那是“开口支撑,td,也许是闭合支撑以外的其他东西......”
#4
0
<tr>[\s]<td[^<]+?>Max Temperature[\w\s]*</td>[\s]
Not looked at it all yet, but that [^<] probably needs to be [^>] as you're trying to match all non-> until the > that's before Max temperature.
还没有看完它,但是[^ <]可能需要[^>],因为你试图匹配所有非>直到>在最高温度之前。
#5
0
The " (ºC)" before the closing td was matched against:
关闭td之前的“(ºC)”与:
<tr>[\s]<td[^<]+?>Max Temperature[^<]*</td>[\s]
Is that \w a word-boundary? I think that it gets a little tricky there, I'd use a more general approach.
这是一个字边界吗?我认为那里有点棘手,我会采用更通用的方法。
And on the third line, there is one whitespace after the td tag, is that accounted for?
在第三行,td标签后面有一个空格,是否占了?
<td[^<]+?>[\s]?(?<time>([\d\:]+))</td>[\s]</tr>
#6
0
I use http://www.regexbuddy.com/ for such controls. So far I tested @sgehrig's suggestion is correct
我使用http://www.regexbuddy.com/进行此类控制。到目前为止,我测试了@ sgehrig的建议是正确的
#7
0
Use the Html Agility Pack or a similar library instead, as @Bjarke Ebert suggests. It's the right tool for the task.
正如@Bjarke Ebert建议的那样,使用Html Agility Pack或类似的库。它是完成任务的正确工具。
#1
1
Try
<tr>\s*
<td[^>]*>.*?</td>\s*
<td[^>]*>\s*(?<value>\d+)\s*</td>\s*
<td[^>]*>\s*(?<time>\d{2}:\d{2}:\d{2})\s*</td>\s*
</tr>\s*
#2
4
Parsing HTML reliably using regexp is known to be notoriously difficult.
众所周知,使用regexp可靠地解析HTML是非常困难的。
I think I would be looking for a HTML parsing library, or a "screen scraping" library ;)
我想我会寻找一个HTML解析库,或“屏幕抓取”库;)
If the HTML comes from an unreliable source, you have to be extra careful to handle malicious HTML syntax well. Bad HTML handling is a major source of security attacks.
如果HTML来自不可靠的源,则必须格外小心处理恶意HTML语法。糟糕的HTML处理是安全攻击的主要来源。
#3
0
When you write <td[^<]+?> I guess you really mean <td[^>]*>
当你写我猜你真的是指] *>
That is "opening brace, td, maybe stuff other than closing brace..."
那是“开口支撑,td,也许是闭合支撑以外的其他东西......”
#4
0
<tr>[\s]<td[^<]+?>Max Temperature[\w\s]*</td>[\s]
Not looked at it all yet, but that [^<] probably needs to be [^>] as you're trying to match all non-> until the > that's before Max temperature.
还没有看完它,但是[^ <]可能需要[^>],因为你试图匹配所有非>直到>在最高温度之前。
#5
0
The " (ºC)" before the closing td was matched against:
关闭td之前的“(ºC)”与:
<tr>[\s]<td[^<]+?>Max Temperature[^<]*</td>[\s]
Is that \w a word-boundary? I think that it gets a little tricky there, I'd use a more general approach.
这是一个字边界吗?我认为那里有点棘手,我会采用更通用的方法。
And on the third line, there is one whitespace after the td tag, is that accounted for?
在第三行,td标签后面有一个空格,是否占了?
<td[^<]+?>[\s]?(?<time>([\d\:]+))</td>[\s]</tr>
#6
0
I use http://www.regexbuddy.com/ for such controls. So far I tested @sgehrig's suggestion is correct
我使用http://www.regexbuddy.com/进行此类控制。到目前为止,我测试了@ sgehrig的建议是正确的
#7
0
Use the Html Agility Pack or a similar library instead, as @Bjarke Ebert suggests. It's the right tool for the task.
正如@Bjarke Ebert建议的那样,使用Html Agility Pack或类似的库。它是完成任务的正确工具。