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a simple crawler by java
由于知乎改版了我把正则表达式改成了这样
System.out.println("正在抓取链接"+zhihuUrl);
String content=Spider.sendGet(zhihuUrl);
Pattern pattern;
Matcher matcher;
pattern=Pattern.compile("<h1 class=\"QuestionHeader-title\">(.+?)</h1>");
matcher=pattern.matcher(content);
if (matcher.find()) {
title = matcher.group(1);
}
pattern=Pattern.compile("<span class=\"RichText\".+?>(.+?)</span>");
matcher=pattern.matcher(content);
if (matcher.find()) {
titleDescription=matcher.group(1);
}
pattern=Pattern.compile("<span class=\"RichText"
+ " CopyrightRichText-richText.+?>(.+?)</span>");
matcher=pattern.matcher(content);
while (matcher.find())
{
answers.add(matcher.group(1));
}
}
然后部分问题就无法抓取了完整了,有些是标题描述抓取不到,有些是只能抓取到一个回答,不知道什么地方出错了
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