正则表达式，从一个字符串中提取链接地址

则需要提取的地址为 “http://www.mianwww.com/html/category/it-interview/softwaretest ”

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

public class Regex {

static void url() {

String input = “IT面试题博客中包含很多 软件测试面试题 “;
Pattern pattern;
Matcher matcher;
pattern = Pattern.compile(“<a(?: [^>]*)+href=([^ >]*)(?: [^>]*)*>”);
matcher = pattern.matcher(input);
while (matcher.find()) {
System.out.println(matcher.group());
}
}

public static void main(String[] args) {
url();
}

}