java 如何用正则获取html中的值_Java Web开发

java 怎么用正则获取html中的值
String pageContent = "<a href='/Patent/01127847' target='_blank'>
<a href='/Patent/01127821' target='_blank'>
<a href='/Patent/01127832' target='_blank'>";
省略其他标签

Pattern pattern2 = Pattern.compile("(<a href='/Patent/([\\s\\S]*?)target='_blank'>)");
Matcher matcher = pattern2.matcher(pageContent);
while (matcher.find()) {
strPage = matcher.group();
}

要怎么样拿到01127847，01127821，01127832

上面哪里出错了

------解决方案--------------------------------------------------------
看不明白呀
------解决方案--------------------------------------------------------

Java code

        String pageContent = "<a href='/Patent/01127847' target='_blank'><a href='/Patent/01127821' target='_blank'><a href='/Patent/01127832' target='_blank'>";                     Pattern pattern2 = Pattern.compile("(?:<a\\s+href='/Patent/([\\s\\S]*?)'\\s+target='_blank'>)");        Matcher matcher = pattern2.matcher(pageContent);        while (matcher.find()) {          System.out.println(matcher.group(1));        }