System.out.println("http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd".replaceAll("TR.*", ""));

------解决方案--------------------
不清楚 你需求

------解决方案--------------------

Java code

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

public class Test {
    public static void main(String[] args) {
        String str = "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd";
        Pattern pattern = Pattern.compile("http://.*(?=TR/xhtml1.*)");
        Matcher matcher = pattern.matcher(str);
        
        while (matcher.find()) {
            System.out.println(matcher.group());
        }
    }
}

------解决方案--------------------
Java code
import java. start=startTime.getDay();
var fill=fillTime.getDay();
if(start>=fill&&(startTime.getTime()-fillTime.getTime()<=(6-fill)*24*60*60*1000))
{
  alert("格式正确！");
}