Java URL正则表达式

 网上转贴的Java正则很让人失望，一篇JavaScript正则集录被很多不负责任的人转来转去，并打上Java正则的标题，汗，真是烂人一堆。
// url正则
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class RegularExpressionTest {

public static void main(String[] args) {

Pattern p = Pattern.compile("^(http|www|ftp|)?(://)?(\\w+(-\\w+)*)(\\.(\\w+(-\\w+)*))*((:\\d+)?)(/(\\w+(-\\w+)*))*(\\.?(\\w)*)(\\?)?(((\\w*%)*(\\w*\\?)*(\\w*:)*(\\w*\\+)*(\\w*\\.)*(\\w*&)*(\\w*-)*(\\w*=)*(\\w*%)*(\\w*\\?)*(\\w*:)*(\\w*\\+)*(\\w*\\.)*(\\w*&)*(\\w*-)*(\\w*=)*)*(\\w*)*)$",Pattern.CASE_INSENSITIVE );
Matcher m = p.matcher("http://www.qqgb.com/Program/Java/JavaFAQ/JavaJ2SE/Program_146959.html");

if(m.find()){
System.out.println(m.group());
}

m = p.matcher("http://baike.baidu.com/view/230199.htm?fr=ala0_1");

if(m.find()){
System.out.println(m.group());
}

m = p.matcher("http://www.google.cn/gwt/x?u=http%3A%2F%2Fanotherbug.blog.chinajavaworld.com%2Fentry%2F4550%2F0%2F&btnGo=Go&source=wax&ie=UTF-8&oe=UTF-8");

if(m.find()){
System.out.println(m.group());
}

m = p.matcher("http://zh.wikipedia.org:80/wiki/Special:Search?search=tielu&go=Go");

if(m.find()){
System.out.println(m.group());
}

}
}
运行结果：
http://www.qqgb.com/Program/Java/JavaFAQ/JavaJ2SE/Program_146959.html
http://baike.baidu.com/view/230199.htm?fr=ala0_1
http://www.google.cn/gwt/x?u=http%3A%2F%2Fanotherbug.blog.chinajavaworld.com%2Fentry%2F4550%2F0%2F&btnGo=Go&source=wax&ie=UTF-8&oe=UTF-8
http://zh.wikipedia.org:80/wiki/Special:Search?search=tielu&go=Go
说明这几种类型的都可以识别。 
      //其他Java正则【转自itpub】 
      01、"^\\d+$"　　//非负整数（正整数 + 0）
　　02、"^[0-9]*[1-9][0-9]*$"　　//