Welcome toVigges Developer Community-Open, Learning,Share
Welcome To Ask or Share your Answers For Others

Categories

0 votes
3.8k views
in Technique[技术] by (71.8m points)

java 正则匹配问题

String Match=""(https://www.tianyancha.com/company/d+)"s*target='_blank'";
String content=""https://www.tianyancha.com/company/3197630155" target='_blank' "https://www.tianyancha.com/company/3482030524" target='_blank'";
Matcher MatcherUrl=pattern.matcher(content);
        System.out.println("打印一下");
        System.out.println(MatcherUrl);
        if(MatcherUrl.find()) {
            System.out.println("打印匹配数据");
            System.out.println(MatcherUrl.group(1));
            System.out.println(MatcherUrl.group(2))
}~~~~

打印结果:

打印匹配数据
https://www.tianyancha.com/company/3197630155
Exception in thread "main" java.lang.IndexOutOfBoundsException: No group 2
    at java.util.regex.Matcher.group(Matcher.java:538)
    at spider.TianYanChaSpider.GetResponse(TianYanChaSpider.java:33)
    at main.Main.main(Main.java:18)

这里group(2)为啥没有匹配到呢?


与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome To Ask or Share your Answers For Others

1 Answer

0 votes
by (71.8m points)
等待大神解答

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome to Vigges Developer Community for programmer and developer-Open, Learning and Share

2.1m questions

2.1m answers

63 comments

56.6k users

...