java 正则表达式

例1：找到ERR + 数字的所有组合

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

public class re {
    public static void main(String[] args){
        String digitNumStr = "11A11、22A22、33A33、44B44、55B55const.ERR_ID:const.ERR1,const.ERR23";
        Pattern digitNumP = Pattern.compile("const.ERR[0-9]+");
        Matcher foundDigitNum = digitNumP.matcher(digitNumStr);

        while (foundDigitNum.find()) {
            String digitNumList = foundDigitNum.group();
            System.out.println(digitNumList);
        }
    }
}

结果

const.ERR1
const.ERR23