在JAVA中使用JSOUP从HTML提取CSS样式 [英] Extract CSS Styles from HTML using JSOUP in JAVA
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问题描述
任何人都可以使用Java中的Jsoup来帮助从HTML中提取CSS样式. 例如在html下面，我要提取 .ft00和.ft01
Can anyone help with extraction of CSS styles from HTML using Jsoup in Java. For e.g in below html i want to extract .ft00 and .ft01
<HTML>
<HEAD>
<TITLE>Page 1</TITLE>
<META http-equiv="Content-Type" content="text/html; charset=UTF-8">
<DIV style="position:relative;width:931;height:1243;">
<STYLE type="text/css">
<!--
.ft00{font-size:11px;font-family:Times;color:#ffffff;}
.ft01{font-size:11px;font-family:Times;color:#ffffff;}
-->
</STYLE>
</HEAD>
</HTML>
推荐答案
如果样式已嵌入到元素中，则只需使用.attr("style").
If the style is embedded in your Element you just have to use .attr("style").
JSoup不是HTML渲染器，它只是HTML解析器，因此您将不得不从检索到的<style>标签html内容中解析内容.您可以为此使用一个简单的正则表达式；但并非在所有情况下都有效.您可能要使用CSS解析器来完成此任务.
JSoup is not a Html renderer, it is just a HTML parser, so you will have to parse the content from the retrieved <style> tag html content. You can use a simple regex for this; but it won't work in all cases. You may want to use a CSS parser for this task.
public class Test {
public static void main(String[] args) throws Exception {
String html = "<HTML>\n" +
"<HEAD>\n"+
"<TITLE>Page 1</TITLE>\n"+
"<META http-equiv=\"Content-Type\" content=\"text/html; charset=UTF-8\">\n"+
"<DIV style=\"position:relative;width:931;height:1243;\">\n"+
"<STYLE type=\"text/css\">\n"+
"<!--\n"+
" .ft00{font-size:11px;font-family:Times;color:#ffffff;}\n"+
" .ft01{font-size:11px;font-family:Times;color:#ffffff;}\n"+
"-->\n"+
"</STYLE>\n"+
"</HEAD>\n"+
"</HTML>";
Document doc = Jsoup.parse(html);
Element style = doc.select("style").first();
Matcher cssMatcher = Pattern.compile("[.](\\w+)\\s*[{]([^}]+)[}]").matcher(style.html());
while (cssMatcher.find()) {
System.out.println("Style `" + cssMatcher.group(1) + "`: " + cssMatcher.group(2));
}
}
}
将输出:
Style `ft00`: font-size:11px;font-family:Times;color:#ffffff;
Style `ft01`: font-size:11px;font-family:Times;color:#ffffff;
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