Java小型管理系统，文章中有源码，适合作为课程作业，个人小项目（中等）

朱雀 2023-10-02 17:45 10阅读 0赞

Bills.java

package cn.tx1;
    
    /**
     * ID  类别  账户  类型   余额  时间  备注
     */
    public class Bills {
        
        private String name;
        private String account;
        private String type;
        private double total;
        private String time;
        private String desc;
    
    
        //全参构造器
        public Bills(String name, String account, String type, double total, String time, String desc) {
        
            this.name = name;
            this.account = account;
            this.type = type;
            this.total = total;
            this.time = time;
            this.desc = desc;
        }
        //无参构造器
    
        public Bills() {
        
        }
        public String getName() {
        
            return name;
        }
    
        public void setName(String name) {
        
            this.name = name;
        }
    
        public String getAccount() {
        
            return account;
        }
    
        public void setAccount(String account) {
        
            this.account = account;
        }
    
        public String getType() {
        
            return type;
        }
    
        public void setType(String type) {
        
            this.type = type;
        }
    
        public double getTotal() {
        
            return total;
        }
    
        public void setTotal(double total) {
        
            this.total = total;
        }
    
        public String getTime() {
        
            return time;
        }
    
        public void setTime(String time) {
        
            this.time = time;
        }
    
        public String getDesc() {
        
            return desc;
        }
    
        public void setDesc(String desc) {
        
            this.desc = desc;
        }
    
    }

MainMenu.java

package cn.tx1;
    
    
    import java.text.ParseException;
    import java.text.SimpleDateFormat;
    import java.util.*;
    import java.util.stream.Collectors;
    import java.util.stream.Stream;
    
    public class MainMenu {
        
        //创建一个集合来存储
        static List<Bills> billsList=new ArrayList<>();
    
        //静态代码块，类加载的时候第一时间执行   “果然还是用到了”
        static {
        
            //String name, String account, String type, double total, String time, String desc
            billsList.add(new Bills("吃饭支出","建设银行","支出",122247,"2022-1-1","家庭聚餐"));
            billsList.add(new Bills("吃饭支出","农业银行","支出",111222,"2021-12-11","家庭聚餐"));
            billsList.add(new Bills("工资收入","农商银行","收入",927227,"2021-11-1","发工资"));
            billsList.add(new Bills("交通支出","交通银行","支出",999247,"2021-1-1","交通支出"));
            billsList.add(new Bills("买气球","建设银行","支出",222147,"2025-1-1","买气球"));
            billsList.add(new Bills("奖金收入","投资银行","收入",908227,"2021-1-1","奖金"));
    
        }
    
        public static void showMain(){
        
            System.out.println("--------随手记---------");
            System.out.println("1、添加账务  2、删除帐务  3、查询账务  4、退出系统");
            System.out.println("请输入功能序号【1-4】：");
        }
        public static void main(String[] args) {
        
            run();
        }
    
    
        public static void run(){
        
            showMain();
            //创建一个flag标志,循环条件，变量存在
            boolean flag=true;
            //创建扫描器
            Scanner sc=new Scanner(System.in);
            //获得输入的选项
            while (flag){
        
                int num=sc.nextInt();
                //判断1、2、3、4
                switch (num){
        
                    case 1:
                        addBills();
                        break;
                    case 2:
                        delBills();
                        break;
                    case 3:
                        select();
                        break;
                    case 4:
                        flag=false;
                        break;
                    default:
                        System.out.println("请重新输入选项：");
                }
            }
            System.out.println("退出系统,拜拜！");
        }
    
        private static void delBills() {
        
            Scanner sc2=new Scanner(System.in);
            int id= sc2.nextInt();
            billsList.remove(id-1);
            System.out.println("删除成功！！");
            showMain();
    
        }
    
        private static void addBills() {
        
            Scanner sc2=new Scanner(System.in);
            Bills bills=new Bills();
    
            System.out.println("请输入类别：");
            bills.setName(sc2.next());
            System.out.println("请输入账户：");
            bills.setAccount(sc2.next());
            System.out.println("请输入收入支出类型：");
            bills.setType(sc2.next());
            System.out.println("请输入金额：：");
            bills.setTotal(sc2.nextInt());
            System.out.println("请输入时间：");
            bills.setTime(sc2.next());
            System.out.println("请输入备注：");
            bills.setDesc(sc2.next());
    
            billsList.add(bills);
            System.out.println("财务添加成功！");
    
    
        }
    
        /**
         * 三种查询
         *   1、查询所有
         *   2、按照时间区间来查询
         *   3、按照收入和支出的类型来查询
         */
        private static void select(){
        
            System.out.println("随手记>>账务查询");
            System.out.println("1、查询所有   2、按照时间区间来查询    3、按照收入和支出的类型来查询");
            //创建扫描器
            Scanner sc1=new Scanner(System.in);
            int num=sc1.nextInt();
            switch (num){
        
                case 1:
                    selectAll();
                    break;
                case 2:
                    selectByData();
                    break;
                case 3:
                    selectByType();
                    break;
    //            default:
    //                System.out.println("亲，请重新输入选项：");
            }
            //展示上一级的主菜单
            showMain();
        }
        private static void selectAll(){
        
            System.out.println("查询所有");
            print(billsList);
    
        }
        private static void selectByData(){
        
            //创建一个时间格式化对象      [格式化器]
            SimpleDateFormat format=new SimpleDateFormat("yyyy-MM-dd");
            System.out.println("按照时间查询");
            System.out.println("随手记>>账务查询>>按照时间查询");
            //创建扫描器
            Scanner sc1=new Scanner(System.in);
            System.out.println("请输入开始时间：");
            String start=sc1.next();
            System.out.println("请输入结束时间：");
            String end=sc1.next();
            //stream 流
            List<Bills> billsList1 = billsList.stream().filter(bills -> {
        
                String time = bills.getTime();
                //把字符串解析成具体时间
                try {
        
                    Date startData = format.parse(start);
                    Date endData = format.parse(end);
                    Date timeData = format.parse(time);
                    if (timeData.before(endData) && timeData.after(startData)) {
        
                        return true;
                    }
                } catch (ParseException e) {
        
                    e.printStackTrace();
                }
                return false;
            }).collect(Collectors.toList());
            print(billsList1);
    
        }
        private static void selectByType(){
        
            System.out.println("按照类型查询");
            System.out.println("随手记>>账务查询>>收入和支出类型");
            System.out.println("请输入   收入或者支出");
            //创建扫描器
            Scanner sc1=new Scanner(System.in);
            String type=sc1.next();
            //收入还是支出
            //筛选一下集合中type时支出的元素    stream筛选   collectCollectors.toList():将流转换为集合
            List<Bills> billsList1 = billsList.stream().filter(bills -> {
        
                String type1 = bills.getType();
                return type1.equals(type);
            }).collect(Collectors.toList());
            print(billsList1);
            //filter 过滤    true要，false不要
    //        stream.filter(bills -> {
        
    //           String type1= bills.getType();
    //           return type1.equals(type);
    //        });
    
    
    
        }
        public static void print(List<Bills> billsList){
        
            System.out.println("ID\t\t类别\t\t\t账户\t\t\t类型\t\t金额\t\t\t\t时间\t\t\t\t备注");
            for (int i = 0; i < billsList.size(); i++) {
        
                Bills bills1=billsList.get(i);
                System.out.println(i+1+"\t\t"+bills1.getName()+"\t\t"+bills1.getAccount()+"\t\t"+bills1.getType()
                +"\t\t"+bills1.getTotal()+"\t\t"+bills1.getTime()+"\t\t"+bills1.getDesc());
            }
        }
    }

![在这里插入图片描述][watermark_type_d3F5LXplbmhlaQ_shadow_50_text_Q1NETiBA5LiN6Imv5L2_size_20_color_FFFFFF_t_70_g_se_x_16]

**代码来源于B站,侵权请联系删除**

[watermark_type_d3F5LXplbmhlaQ_shadow_50_text_Q1NETiBA5LiN6Imv5L2_size_20_color_FFFFFF_t_70_g_se_x_16]: https://img-blog.csdnimg.cn/f2cd526e635e4a30833b68966fa1e9de.png?x-oss-process=image/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBA5LiN6Imv5L2_,size_20,color_FFFFFF,t_70,g_se,x_16