我有以下HTML:

Foo
The quick brown fox.
Bar
Jumps over the lazy dog.

我想将其更改为以下HTML:

Foo
The quick brown fox.
Bar
Jumps over the lazy dog.

如何查找和替换某些HTML标记？我可以使用Nokogiri宝石.

试试这个:

require 'nokogiri'

html_text = "
Foo
The quick brown fox.
Bar
Jumps over the lazy dog.
"

frag = Nokogiri::HTML(html_text)
frag.xpath("//h1").each { |div|  div.name= "p"; div.set_attribute("class" , "title") }

看起来这样可行:

require 'rubygems'
require 'nokogiri'

markup = Nokogiri::HTML.parse(<<-somehtml)


Foo
The quick brown fox.
Bar
Jumps over the lazy dog.


somehtml

markup.css('h1').each do |el|
  el.name = 'p'
  el.set_attribute('class','title')
end

puts markup.to_html
# >> 
# >> 
# >> 
Foo
# >> 
The quick brown fox.
# >> 
Bar
# >> 
Jumps over the lazy dog.
# >> 

#!/usr/bin/env ruby
require 'rubygems'
gem 'nokogiri', '~> 1.2.1'
require 'nokogiri'

doc = Nokogiri::HTML.parse <<-HERE
  
    
      
Foo
      
The quick brown fox.
      
Bar
      
Jumps over the lazy dog.
    
  
HERE

doc.search('h1').each do |heading|
  heading.name = 'p'
  heading['class'] = 'title'
end

puts doc.to_html