正则表达式（十三）——分组

1、分组

package com.wy.regular;

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

public class RegularTest {

    public static void main(String[] args) {
        /**
         * 正则表达式的分组 group
         */
        Pattern pattern = Pattern.compile("\d{3,5}[a-z]{2}");
        Matcher matcher = pattern.matcher("123aa-45456bb-789cc-00");
        // 字串：123aa 45456bb 789cc
        while (matcher.find()) {
            pri(matcher.group());
        }
    }

    public static void pri(Object object){
        System.out.println(object);
    }
}

2、查找分组后的数字

package com.wy.regular;

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

public class RegularTest {

    public static void main(String[] args) {
        /**
         * 正则表达式的分组 group
         * (\d{3,5})([a-z]{2}) 把数字和字母分组。切记：这里是大括号而不是花括号
         */
        Pattern pattern = Pattern.compile("(\d{3,5})([a-z]{2})");
        String str = "123aa-45456bb-789cc-00";
        Matcher matcher = pattern.matcher(str);
        // 打印数字
        while (matcher.find()) {
            pri(matcher.group(1));
        }
    }

    public static void pri(Object object){
        System.out.println(object);
    }
}