正则表达式匹配img标签中的src获取地址

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

public class aa {

    public static void main(String[] args) {
        String htmlStr = "<img src=‘http://1231//1231/123/123.jpg‘ alt=‘图片‘>";
        Matcher m = Pattern.compile("src="?(.*?)("|>|s+)").matcher(htmlStr);
        String filePath = "";
        while(m.find())
        {    
            filePath = m.group(1);
        }
        System.out.println(filePath);
        System.out.println(filePath.substring(filePath.lastIndexOf("/")+1,filePath.length()-1));
    }

}