如何使用Java正则表达式解决此问题？

Question

I have a line like this :

EQ=ENABLED,QLPUB=50,EPRE=ENABLED,T200=44-31-41-90-90-90-135

with java Regex ,I want to show this :

EQ=ENABLED,QLPUB=50,EPRE=ENABLED

I wrote this as Regex :

^EQ=ENABLED,QLPUB=[^,]*,EPRE=ENABLED$

but it's not show me correctly , why? thanks

Thanks for your help ...

Answer 1

The $ at the end means it will only match the end of the string. You just want to stop the match at the end, not require that it is the end of the input. Try just:

^EQ=ENABLED,QLPUB=[^,]*,EPRE=ENABLED

Sample code:

import java.util.regex.*;

public class Test
{
    public static void main(String[] args)
    {
        String text = "EQ=ENABLED,QLPUB=50,EPRE=ENABLED,T200=44-31-41-90-90-90-135";
        Pattern pattern = Pattern.compile("^EQ=ENABLED,QLPUB=[^,]*,EPRE=ENABLED");
        Matcher matcher = pattern.matcher(text);
        if (matcher.lookingAt())
        {
            System.out.println(matcher.group());
        }
    }
}