Java通过正则表达式获取域名简单示例

String url = http://www.linuxidc.com/entry/4545/0/;
Pattern p = Pattern.compile("(?<=http://|\\.)[^.]*?\\.(com|cn|net|org|biz|info|cc|tv)",Pattern.CASE_INSENSITIVE);
Matcher matcher = p.matcher(url);
matcher.find();
System.out.println(matcher.group());//结果：linuxidc.com

String url = "http://127.0.0.1\\.testserver.cn/1.htm";
Pattern p = Pattern.compile("[^//]*?\\.(com|cn|net|org|biz|info|cc|tv).*", Pattern.CASE_INSENSITIVE);
Matcher matcher = p.matcher(url);
matcher.find();
 System.out.println("------------------->"+matcher.group());

public class RegExp11 {
    public static void main(String[] args){
        String content = "https://www.bilibili.com/video/BV1Eq4y1E79W?from=search&seid=9946545262871408175";
        //思路：
        // 1.先验证url开始部分 https:// 或 http://
        // 2.通过((http|https)://)([\w-]+\.)+[\w$]+ 匹配域名www.bilibili.com
        // 3.(\/[\w-?=&./]*)? 匹配 /video/BV1Eq4y1E79W?from=search&seid
        String regStr = "^((http|https)://)([\\w-]+\\.)+[\\w$]+(\\/[\\w-?=&./]*)?$";//[.?*]表示匹配的就是本身
        Pattern pattern = Pattern.compile(regStr);
        Matcher matcher = pattern.matcher(content);
        if (matcher.find()){
            System.out.println("满足格式！");
        }else {
            System.out.println("不满足格式！");
        }
    }
}