正则表达式—获取、分隔、匹配

	// 获取
	public static void fuctionDemo_5() {
		String str = "yang cheng yong ben dan ba shi de ta hen sha";
		String regex = "\\b[a-z]{3}\\b";
		Pattern p = Pattern.compile(regex);
		Matcher m = p.matcher(str);
		while (m.find()) {
			System.out.println(m.group());
		}
	}

	public static void fuctionDemo_4() {
		String str = "18758183839";
		str = str.replaceAll("(\\d{3})\\d{4}(\\d{4})","$1****$2");
		System.out.println(str);
	}

	// 分割1
	public static void fuctionDemo_3() {
		String str = "yang8888cheng222yong";
		str = str.replaceAll("(.)\\1+","$1");
		System.out.println(str);
	}

	// 切割2
	public static void fuctionDemo_2() {
		String s1 = "yang   cheng        yong beng    dan";
		String[] names = s1.split(" +");
		for (String name : names) {
			System.out.println(name);
		}
		String s2 = "yang###sha@@@bi";
		String[] names2 = s2.split("(.)\\1+");
		for (String name : names2) {
			System.out.println(name);
		}
	}

	// 匹配手机号码是否正确
	public static void fuctionDemo_1() {
		String num = "15958184259";
		String regex = "1[358][0-9]{9}";
		boolean b = num.matches(regex);
		System.out.println(num + ":" + b);
	}

原文地址：https://www.jb51.cc/regex/361537.html