com.github.xphsc.util.RegexUtil Maven / Gradle / Ivy

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package com.github.xphsc.util;

import com.github.xphsc.exception.IllegalGroupIndexException;

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

/**
 * Created by ${huipei.x} on 2017/6/20
 */
public class RegexUtil {


    static
    public boolean isMatched(String pattern, String reg) {
        Pattern compile = Pattern.compile(reg);
        return compile.matcher(pattern).matches();
    }

    static
    public List match(String pattern, String reg, int group)
            throws IllegalGroupIndexException {

        List matchGroups = new ArrayList<>();
        Pattern compile = Pattern.compile(reg);
        Matcher matcher = compile.matcher(pattern);
        if (group > matcher.groupCount() || group < 0)
            throw new IllegalGroupIndexException("Illegal match group :" + group);
        while (matcher.find()) {
            matchGroups.add(matcher.group(group));
        }
        return matchGroups;
    }


    static public String match(String pattern, String reg) {

        String match = null;
        try {
            List matchs = match(pattern, reg, 0);
            if (null != matchs && matchs.size() > 0) {
                match = matchs.get(0);
            }
        } catch (IllegalGroupIndexException e) {
            e.printStackTrace();
        }
        return match;
    }

    public static String converNumByReg(String number){
        Pattern compile = Pattern.compile("^(\\d+)(\\.0*)?$");
        Matcher matcher = compile.matcher(number);
        while (matcher.find()){
            number = matcher.group(1);
        }
        return number;
    }
}