求一url正则

Question

//几种url
href="http://diy.sina.com.cn/cardshow.php" target="_blank">
href=http://video.sina.com.cn/p/sports/k/v/2011-10-17/092261530255.html target="_blank">
href="http://auto.sina.com.cn/?c=spr_web_sina_sina_www_T001">我想得到href后面的有效url，正则怎么弄？

Answer 1

public static String getPaperName(String url){
String res = "";
Pattern p = Pattern.compile("href=\"?(.*?)[\"|\\s)]");
Matcher m = p.matcher(url);
while(m.find()){
res = m.group(1);
}
return res;
} 
public static void main(String[] args) {
System.out.println(getPaperName("href=\"http://diy.sina.com.cn/cardshow.php\" target=\"_blank\">"));
System.out.println(getPaperName("href=http://video.sina.com.cn/p/sports/k/v/2011-10-17/092261530255.html target=\"_blank\">"));
System.out.println(getPaperName("href=\"http://auto.sina.com.cn/?c=spr_web_sina_sina_www_T001\">"));
}

Answer 2

http(s)?://([\w-]+\.)+[\w-]+(/[\w-./?%&=]*)?

Answer 3

[code=Java]<SCRIPT LANGUAGE="javascript">
<!--function prints(str) {var matchPIC = new RegExp("((?:http|https|ftp|mms|rtsp)://(&(?=amp;)|[A-Za-z0-9\./=\?%_~@#:;\+\-])+(gif|jpg|png))", "ig");
var matchURL = new RegExp("((?:http|https|ftp|mms|rtsp)://(&(?=amp;)|[A-Za-z0-9\./=\?%_~@&#:;\+\-])+)","ig");
var str2 ="";
str2 =str.replace("&nbsp;"," ")
    if(matchPIC.test(str)){                    
         document.write(str2.replace(matchPIC, "<img src=\"$1\" hint=\"$1\"></img>"));     
    }else{        
           document.write(str2.replace(matchURL, "<a target=\"_blank\" href=\"$1\">$1</a>"));
    }
}
//-->
</SCRIPT>code]