第一个java项目

对着这个学的

02、项目实战：ATM系统架构搭建、欢迎页面设计_哔哩哔哩_bilibili

学java安全，还是稍微学一点点的java，这次是写了两个小时写的，这辈子第一个jama项目呜呜呜

main

1
2
3
4
5
6
7
8
9
package org.example;
import java.util.ArrayList;
import java.lang.*;
public class Main {
    public static void main(String[] args) {
        atm test=new atm();
        test.start();
    }
    }

atm

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
package org.example;
import java.io.*;
import java.util.ArrayList;
import java.util.Objects;
import java.util.Scanner;

public class atm {
    ArrayList<account> total=new ArrayList<account>();
    private  int flag=-1;
    public void start(){
    while(true){
        System.out.println("======================请输入您的操作====================");
        System.out.println("1.登录  2.注册  3.查询  4.存钱  5，取钱  6.注销账号   7.退出登录   8.退出程序");
        Scanner put_in=new Scanner(System.in);
        String  options=put_in.next();
        switch (options){
            case "1":login();break;
            case "2":register();break;
            case "3":select_account();break;
            case "4":account_in();break;
            case "5":account_out();break;
            case "6":account_delete();break;
            case "7":flag=-1;
                System.out.println("成功退出登录");
                break;
            case "8":return;
        }
    }
    }
    public void login(){
        if (flag!=-1){
            System.out.println("您已经登录！");
            return;
        }
        System.out.println("请输入您的账号：");
        Scanner put_in=new Scanner(System.in);
        String  account_name=put_in.next();
        for(int i=0;i<=total.size();i++){
            if (i==total.size()){
                System.out.println("输入的账号不存在！");
                return;
            }
            if(Objects.equals(total.get(i).getAccount_name(), account_name)) {
                flag=i;
                break;
            }
        }
        System.out.println("请输入密码:");
        String secret=put_in.next();
         if(Objects.equals(total.get(flag).getAccount_secret(), secret)){
             System.out.println("登录成功！");
         }else System.out.println("密码错误！");
    }
    public void register(){
        System.out.println("请输入您的账号：");
        Scanner put_in=new Scanner(System.in);
        String  account_name=put_in.next();
        System.out.println("请输入您的密码：");
        String secret=put_in.next();
        double money=0;
        total.add(new account(account_name,secret,money));
        System.out.println("注册成功！");
    }
    public void select_account(){
        if (!status())return;
        System.out.println("您的账户如下");
        System.out.println("账户名字："+total.get(flag).getAccount_name());
        System.out.println("账户余额"+total.get(flag).getAccount_money());
    }
    public void account_in(){
        if (!status())return;
        System.out.println("请输入金额：");
        Scanner put_in=new Scanner(System.in);
        double money = put_in.nextDouble();
        if (money<0){
            System.out.println("金额不可以是负数");
            return;
        }
        total.get(flag).setAccount_money(total.get(flag).getAccount_money()+money);
        System.out.println("已经存入"+money+"元\n现在账户中存有"+total.get(flag).getAccount_money()+"元");
    }
    public void account_delete(){
        if (!status())return;
        System.out.println("你确定要注销当前账户"+total.get(flag).getAccount_name()+"吗");
        System.out.println("继续删除 Y/N");
        Scanner put_in=new Scanner(System.in);
        String choose=put_in.next();
        if (choose.equals("Y")){
            total.remove(flag);
        }else return;
    }
    public void account_out(){
        if (!status())return;
        System.out.println("您的账户中有"+total.get(flag).getAccount_money()+"元");
        System.out.println("请输入取出金额:");
        Scanner put_in=new Scanner(System.in);
        double money = put_in.nextDouble();
        if (money<0){
            System.out.println("金额不可以是负数");
            return;
        }
        if (total.get(flag).getAccount_money()-money<0){
            System.out.println("没钱你取牛魔酬宾");
            return;
        }
        total.get(flag).setAccount_money(total.get(flag).getAccount_money()-money);
        System.out.println("已经取出"+money+"元\n现在账户中存有"+total.get(flag).getAccount_money()+"元");
    }
    public boolean status(){
        if (flag==-1){
            System.out.println("您还没有登录！");
            return false;
        }
        return true;
    }

}

account

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
package org.example;

public class account {
    private String account_name;
    private String account_secret;
    private double account_money;


    public account(String account_name, String account_secret, double account_money) {
        this.account_name = account_name;
        this.account_secret = account_secret;
        this.account_money = account_money;
    }

    public String getAccount_name() {
        return account_name;
    }

    public void setAccount_name(String account_name) {
        this.account_name = account_name;
    }

    public String getAccount_secret() {
        return account_secret;
    }

    public void setAccount_secret(String account_secret) {
        this.account_secret = account_secret;
    }

    public double getAccount_money() {
        return account_money;
    }

    public void setAccount_money(double account_money) {
        this.account_money = account_money;
    }
}

java确实写开发很方便，拿c写我还真不知道怎么搞