从控制台输入用户的信息并校验 用正则表达式校验用户输入的信息，如果符合则放到相应的属性，如果不符合则让用户重新输入该字段

Student类：

import java.util.Date;
import java.util.Scanner;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import java.util.Date;
/**
 * /**
 * 从控制台输入用户的信息并校验
 * 用正则表达式校验用户输入的信息，如果符合则放到相应的属性，如果不符合则让用户重新输入该字段
 * @author Administrator
 *
 */

public class Student {
	private static String name;  //1-5个中文汉字
	private static int age;    //1-100
	private Date birthday;  //输入格式2010/09/09
	private static String email;  //
	private static double money;  //余额，必须有两位小数
	private static String computerIP;  //例如192.168.36.36	
	
	public Student() {
		super();
	}
	
	public Student(String name, int age, Date birthday, String email, double money, String computerIP) {
		super();
		this.name = name;
		this.age = age;
		this.birthday = birthday;
		this.email = email;
		this.money = money;
		this.computerIP = computerIP;
	}


	public static void isChinese(){
		 Scanner sc = new Scanner(System.in);
		 System.out.println("请输入姓名：");
	     String name = sc.nextLine();
	     String regEx = "[\u4e00-\u9fa5]{1,5}";
	     Pattern p = Pattern.compile(regEx);
	     Matcher m = p.matcher(name);
			boolean flg = m.matches();
			if (flg == false) {
				System.out.println("用户名格式有误，请重新输入！");
				System.out.println("请重新输入用户名:");
				name = sc.nextLine();
			}
			System.out.println("用户名格式正确");
	   }
	public static void isAge(){
		Scanner sc = new Scanner(System.in);
		System.out.println("请输入年龄:");
		String age1 = Integer.toString(age);
		age1 = sc.nextLine();
		Pattern p = Pattern.compile("^([1-9]|[0-9]{2}|100)$");
		Matcher m = p.matcher(age1);
		boolean flg = m.matches();
		if (flg == false) {
			System.out.println("年龄格式有误，请重新输入！");
			System.out.println("请重新输入年龄:");
			age1 = sc.nextLine();
		}
		System.out.println("年龄格式正确");
	}

	public static void isbirthday(){
		Scanner sc = new Scanner(System.in);
		System.out.println("请输入生日:");
		String birthday = sc.nextLine();
		Pattern p = Pattern.compile("\\d{4}/\\d{2}/\\d{2}");
		Matcher m = p.matcher(birthday);
		boolean flg = m.matches();
		if (flg == false) {
			System.out.println("生日格式有误，请重新输入！");
			System.out.println("请重新输入生日:");
			birthday = sc.nextLine();
		}
		System.out.println("生日格式正确");
	}
	
	public static void isEmail(){
		Scanner sc = new Scanner(System.in);
		System.out.println("请输入邮箱:");
		String email = sc.nextLine();
		Pattern p4 = Pattern.compile("[a-zA-Z][a-zA-Z0-9]{5,15}@\\w+\\.com");
		Matcher m4 = p4.matcher(email);
		boolean flg = m4.matches();
		if (flg == false) {
			System.out.println("邮箱格式有误，请重新输入！");
			System.out.println("请重新输入邮箱:");
			email = sc.nextLine();
		}
		System.out.println("邮箱格式正确");
	}
	public static void isMoney(){
		Scanner sc = new Scanner(System.in);
		System.out.println("请输入余额:");
		String money1 = Double.toString(money);
		money1 = sc.nextLine();
		Pattern p = Pattern.compile("\\d{1,}(\\.\\d{1,2})");
		Matcher m = p.matcher(money1);
		 boolean flg = m.matches();
		if (flg == false) {
			System.out.println("余额格式有误，请重新输入！");
			System.out.println("请重新输入余额:");
			money1 = sc.nextLine();
		}
		System.out.println("余额格式正确");
	}
	
	public static void isIP(){
		
		Scanner sc = new Scanner(System.in);
		System.out.println("请输入IP:");
		String computerIP = sc.nextLine();
		Pattern p = 
				Pattern.compile("^((25[0-5]|2[0-4]\\d|[1]{1}\\d{1}\\d{1}|[1-9]{1}\\d{1}|\\d{1})($|(?!\\.$)\\.)){4}$ ");
		Matcher m = p.matcher(computerIP);
		boolean flg = m.matches();
		if (flg == false) {
			System.out.println("IP格式有误，请重新输入！");
			System.out.println("请重新输入IP:");
			computerIP = sc.nextLine();
		}
		System.out.println("IP格式正确");
		
	}

	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public int getAge() {
		return age;
	}
	public void setAge(int age) {
		this.age = age;
	}
	public Date getBirthday() {
		return birthday;
	}
	public void setBirthday(Date birthday) {
		this.birthday = birthday;
	}
	public String getEmail() {
		return email;
	}
	public void setEmail(String email) {
		this.email = email;
	}
	public double getMoney() {
		return money;
	}
	public void setMoney(double money) {
		this.money = money;
	}
	public String getComputerIP() {
		return computerIP;
	}
	public void setComputerIP(String computerIP) {
		this.computerIP = computerIP;
	}
}

测试类：

public class Test01 {
	public static void main(String[] args) {
		Student s = new Student();
//		s.isChinese();
//		s.isAge();
		s.isbirthday();
//		s.isEmail();
//		s.isMoney();
//		s.isIP();
	}
}