Java学习笔记（二）—— 简单的微博用户注册程序

User类

package webo;

import java.util.Date;

public class User {
	private String name;
	public User(String name, String mima, Date birthday, String telephone, String email) {
		this.name = name;
	}
	public int hashCode() {
		return name.hashCode();
	}
	public boolean equals(Object obj) {
		if(this==obj) {//判断是否为同一个对象
			return true;
		}
		if(obj==null) { //判断这个对象是否为空
			return false;
		}
		if(getClass()!=obj.getClass()) {  //判断这个对象是否为user类型
			return false;
		}
	    User u1=(User)obj;//强制类型转换
		if(name==null) {//判断集合中用户名是否为空
			if(u1.name!=null) {//判断对象中用户名是否为空    
				return false;
			}
			else if(!name.equals(u1.name)) {//判断用户名是否相同
				return false;
			}
		}		
		return true;		
	}
}

Check类

package webo;

import java.util.Date;
import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.HashSet;
 
public class Check {
	public static HashSet<User> hs=new HashSet<User>(); 
	public Check(HashSet<User> hs) {           
		this.hs=hs;
	}	
	//检验用户信息,返回登录信息
	public String checkaction(String name, String mima, String remima, String birthday, String telephone, String email) {		
		StringBuilder result=new StringBuilder();
		//1表示成功, 2表示失败		
		int state=1;
		//密码判断
		if(!mima.equals(remima)) {
			result.append("两次输入密码不一致!\n");
			state=2;
		}		
		//生日判断
		if(birthday.length()!=10) {
			result.append("生日格式不正确!\n");
			state=2;
		}else {
			for(int i=0;i<birthday.length();i++) {
				
				Character thischar=birthday.charAt(i);             
				if(i==4 || i==7) {
					if(!(thischar=='-')) {
						result.append("生日格式不正确!\n");
						state=2;
					}else {
						if((Character.isDigit(thischar))) {            
							result.append("");
							state=2;						
						}						
					}					
				}										
			}			
		}
		if(telephone.length()!=11) {
			result.append("手机号不正确!\n");
			state=2;
		}
		else if(!(telephone.startsWith("13") ||telephone.startsWith("15") ||telephone.startsWith("17") ||telephone.startsWith("18"))) {
			result.append("手机号不正确!\n");
			state=2;
		}		
		if(!email.contains("@")) {             //不带@符号的邮箱为无效邮箱
			result.append("邮箱不正确!\n");
			state=2;			
		}		
		if(state==1) {
			DateFormat format=new SimpleDateFormat("yyyy-MM-dd");    			

			Date databirthday=null;            	
				try {
					databirthday=format.parse(birthday);
				} catch (ParseException e) {
					e.printStackTrace();
				}		
			User newuser=new User(name, remima, databirthday, telephone, email);
			
			if(!hs.add(newuser)) {
				result.append("用户重复");
				state=2;
			}
			if(state==1) {
				result.append("注册成功!");
			}		
		}	
		return result.toString();		
	} 
}

UserRegister类

package webo;

import java.util.Date;
import java.util.HashSet;
import java.util.Scanner;
 
//注册类信息
public class UserRegister {
	public static HashSet<User> hs=new HashSet<User>();  
	public static void main(String[] args) {
		initdata();                            
		Scanner scan=new Scanner(System.in);
		System.out.print("请输入用户名: ");
		String name=scan.nextLine();
		System.out.print("请输入密码: ");
		String mima=scan.nextLine();		
		System.out.print("请重复密码: ");
		String remima=scan.nextLine();		
		System.out.print("请输入出生日期: ");
		String birthday=scan.nextLine();		
		System.out.print("请输入手机号码: ");
		String telephone=scan.nextLine();		
		System.out.print("请输入电子邮箱: ");
		String email=scan.nextLine();		
		//检验用户信息,返回登录信息
		Check checkinfo=new Check(hs);       		
		String result=checkinfo.checkaction(name, mima, remima, birthday, telephone, email);		
		System.out.println("注册结果: "+result);				
	}
	//,创建用户信息
	private static void initdata() {
		User use1=new User("zhangsan", "zhangsan123", new Date(), "18256656661", "zhangsan@qq.com");
		User use2=new User("lisi",     "lisi123",     new Date(), "18256656662", "lisi@qq.com");	
		User use3=new User("wangwu",   "wangwu123",   new Date(), "18256656663", "wangwu@qq.com");
		hs.add(use1);		
		hs.add(use2);
		hs.add(use3);
	}				
}

运行上面的代码，填入信息进行注册

注册新用户