随手记系统java项目

//使用jdk1.8新特性 集合查询（筛选）
//集合Stream流
 List<Pojo> list= pojoList.stream().filter(pojo -> {
    String type2 = pojo.getType();
    return type2.equals(type);
}).collect(Collectors.toList());
 print(list);


遇到一个问题：如果不是使方法输出而是使用

System.out.println(list);

则会出现这样的情况：
com.tang.@.........


功能类：

package com.tang;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.*;
import java.util.stream.Collectors;
import java.util.stream.Stream;


public class MainMeau {

    //创建一个集合
    static List<Pojo> pojoList = new ArrayList<>();

    static {
        pojoList.add(new Pojo("吃饭支出",247,"交行","支出","2021-03-02","家庭聚餐"));
        pojoList.add(new Pojo("吃饭支出",247,"交行","支出","2021-03-02","家庭聚餐"));
        pojoList.add(new Pojo("工资收入",12345,"现金","收入","2021-05-07","发工资"));
        pojoList.add(new Pojo("服装支出",1998,"现金","支出","2021-06-02","买衣服"));
        pojoList.add(new Pojo("股票收入",325,"工行","收入","2021-08-12","股票大涨"));
        pojoList.add(new Pojo("股票收入",5000,"工行","收入","2021-09-22","家股票大涨"));
        pojoList.add(new Pojo("工资收入",6000,"交行","收入","2021-10-02","发工资"));
        pojoList.add(new Pojo("礼金支出",3000,"现金","支出","2021-11-02","朋友结婚"));
    }
    public static void main(String[] args) {
        run();

    }
    public static void showMeau(){
        System.out.println("------------随手记------------");
        System.out.println("1.添加账务 2.删除账务 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 run() {

        showMeau();

        boolean flag = true;
        //接受用户输入的数据
        Scanner op = new Scanner(System.in);

        while (flag) {
            int i = op.nextInt();
            switch (i) {
                case 1:
                    addPojo();
                    break;

                case 2:
                    deletePojo();
                    break;

                case 3:
                   select();
                    break;

                case 4:
                    flag = false;
                    break;

                default:
                    System.out.println("请重新输入");
            }

        }
        System.out.println("退出系统拜拜");

    }

    private static void deletePojo() {
        System.out.println("请选择要删除哪一个输入序号： 比如1");
        Scanner scanner = new Scanner(System.in);
        int id = scanner.nextInt();
        pojoList.remove(id-1);
        System.out.println("删除成功");
        showMeau();
    }

    private static void addPojo() {
        Scanner inscanner = new Scanner(System.in);

        Pojo pojo =new Pojo();
        System.out.println("请输入ID");
        pojo.setName(inscanner.next());
        System.out.println("请输入金额");
        pojo.setTotal(inscanner.nextDouble());
        System.out.println("请输入账户");
        pojo.setAccount(inscanner.next());
        System.out.println("请输入类型");
        pojo.setType(inscanner.next());
        System.out.println("请输入时间");
        pojo.setTime(inscanner.next());
        System.out.println("请输入备注");
        pojo.setDesc(inscanner.next());

        pojoList.add(pojo);
        System.out.println("添加账务成功");
        showMeau();

    }

    /*
    创建三种查询 1.查询全部 2.根据时间查询 3.根据类型查询
     */
    private static void select() {
        System.out.println("-----------------查询账务--------------------");
        System.out.println("1.查询全部 2.根据时间查询 3.根据类型查询");
        //创建扫描器
        Scanner scanner = new Scanner(System.in);

        int i = scanner.nextInt();

        switch (i){
            case 1:
                selectAll();
                break;

            case 2:
                selectByDate();
                break;
            case 3:
                selectByType();
                break;

        }
        //返回主菜单
        showMeau();
    }

    private static void selectByType() {
        //按照类型查询
        System.out.println("---------------收入和支出的账务---------------");
        System.out.println("请输入： 收入或者支出来查询");

        Scanner scanner = new Scanner(System.in);

        //收入 支出
        String type = scanner.next();
        //使用jdk1.8新特性 集合查询
        //集合Stream流
         List<Pojo> list= pojoList.stream().filter(pojo -> {
            String type2 = pojo.getType();
            return type2.equals(type);
        }).collect(Collectors.toList());
         print(list);



    }


    private static void selectByDate() {
        //创建一个时间的个数
        SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");
        //按照时间查询
        System.out.println("---------------根据时间查询账务---------------");
        System.out.println("格式为： 2021-02-01");
        Scanner scanner = new Scanner(System.in);
        System.out.println("请输入： 开始时间");
        String start =  scanner.next();

        System.out.println("请输入： 结束时间");
        String end =scanner.next();

        List<Pojo> list = pojoList.stream().filter(pojo -> {
            String time = pojo.getTime();

            try {
                Date startDate = format.parse(start);
                Date endsDate = format.parse(end);
                Date timeDate = format.parse(time);
                if (timeDate.after(startDate) && timeDate.before(endsDate)) {
                    return true;
                }
            } catch (ParseException e) {
                e.printStackTrace();
            }
            return false;


        }).collect(Collectors.toList());
        print(list);


    }

    private static void selectAll() {
        print(pojoList);

    }

    private static void print(List<Pojo> pojoList) {
        System.out.println("ID\t\t金额\t\t账户\t\t类型\t\t时间\t\t备注");
        for (int i = 0; i < pojoList.size(); i++) {
            Pojo pojo = pojoList.get(i);
            System.out.println(pojo.getName()+"\t"+pojo.getTotal()+"\t"+pojo.getAccount()+"\t"+pojo.getType()+"\t"+pojo.getTime()+"\t"+pojo.getDesc());
        }
    }
}


实体类（）：

package com.tang;

/*
ID 类别 账户 类型 余额 时间 备注
 */
public class Pojo {
    private String  name;
    private  String account;
    private  String type;
    private  double total;
    private  String time;
    private String desc;

    public Pojo(String name,double total, String account, String type,  String time, String desc) {
        this.name = name;
        this.account = account;
        this.type = type;
        this.total = total;
        this.time = time;
        this.desc = desc;
    }

    public Pojo() {

    }

    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;
    }
}