DomainRegex.java

import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 * Author: dc0453
 * Since: 2017/8/10 上午10:26
 */
public class DomainRegex {

 /**
 * 获取url域名部分，包括host:port这种形式的
 */
 public static final String pattern = "(?<=[://])[^/]+(?=/?)";

 public static final Pattern p = Pattern.compile(pattern);

 public static void main(String[] args) {
 String str = "http://www.baidu.com";
 Matcher m = p.matcher(str);
 if (m.find()) {
 System.out.println(m.group(0));
 }
 }
}