java 数据类型String 【正则表达式】匹配工具 Pattern和Matcher

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

/**
 * @ClassName PatternMatchExample
 * @projectName: object1
 * @author: Zhangmingda
 * @description： XXX
 * date: 2021/4/14.
 */
public class PatternMatchExample {
    public static void main(String[] args) {
        //匹配手机号的正则示例
        Pattern pattern = Pattern.compile("1[34785]\\d{9}");
        String string = "a的电话号是13212312123,b的电话是13332141234";
        Matcher matcher = pattern.matcher(string);
//        System.out.println(matcher.find());   //find找是否有匹配的子串
//        System.out.println(matcher.group()); //必须find()后才能group找到，或者整个字符串完全匹配才行
        while (matcher.find()){
            System.out.println(matcher.group() + " 匹配的起始下标:"+ matcher.start() + " 匹配的结束下标:" + matcher.end());
        }
        System.out.println(matcher.matches()); //false整个字符串完全匹配才行
        System.out.println(matcher.lookingAt()); //false 从字符串开头开始匹配
        Pattern pattern1 = Pattern.compile(".{6}1[34785]\\d{9}.*");
        Matcher matcher1 = pattern1.matcher(string);
        System.out.println(matcher1.matches()); //true 整个字符串完全匹配
    }
}