tutu的系统

Posted 2020-10-26 vickytjh

import java.io.FileOutputStream;
import java.io.PrintStream;
import java.sql.Date;
import java.util.ArrayList;
import java.util.Scanner;
import java.io.File;
import java.util.SplittableRandom;

public class tuSystem {

    //常量
    private static final int INT_TYPE = 1;
    private static final int STRING_TYPE = 2;
    private static final int DATE_TYPE = 3;
    private static final int DOUBLE_TYPE = 4;
    private static final String SPLIT = "#";


    public static void main(String[] args) {
//        tuSystem tu = new tuSystem();
//        tu.start();
        tuSystem.start();
    }

    static File file;
    static PrintStream ps;

    //输出内容
    public static void printString(String string){
        System.out.print(string);
        try{
            if(file == null){
                file = new File("d://log.txt");
                if(!file.exists()){
                    file.createNewFile();
                }
            }
            if (ps == null){
                ps = new PrintStream(new FileOutputStream(file, true));
            }
            ps.append(string);
        }catch (Exception e){
            System.out.print(e.getMessage());
        }
    }


    //获取输入数据验证
    public static Object getInputValue(int type) {
        while (true) {
            Scanner scanner = new Scanner(System.in);
            Object obj = scanner.next();
            if (obj.toString().equals(SPLIT)) {
                System.out.print("请重新输入:");
                continue;
            }
            try{
                switch (type) {
                    case INT_TYPE:
                        obj = Integer.parseInt(obj.toString());
                        break;
                    case STRING_TYPE:
                        obj = obj.toString();
                        break;
                    case DATE_TYPE:
                        obj = Date.valueOf(obj.toString());
                        break;
                    case DOUBLE_TYPE:
                        obj = Double.parseDouble(obj.toString());
                        break;
                }
                return obj;
            }catch(Exception e){
                System.out.println("请重新输入");
            }
        }
    }

    //获取输入数据验证
    public static Object getInputValue(int type, Object[] range) {
        Object obj = getInputValue(type);
        for (int i = 0; i < range.length; i++)
        {
            if ((range[i] + "").equals(obj.toString())) {
                return obj;
            }
        }
        System.out.println("请重新输入");
        obj = getInputValue(type,range);
        return obj;
    }

    //是否继续
    public static boolean isContinue(){
        System.out.print("是否继续（Y/N）？");
        String isContinue = getInputValue(STRING_TYPE).toString();
        if(!"Y".equals(isContinue.toUpperCase())){
            return false;
        }
        return true;
    }

    //启动菜单
    public static void start() {
        String title = "----欢迎来到图图的家----";
        System.out.println(title);
        myMenu();
    }

    //菜单
    public static void myMenu() {
        String menu = "1.计算器 \n" +
                "2.水仙花 \n" +
                "3.菱形图案 \n" +
                "4.人员管理 \n" +
                "9.退出 \n" +
                "请选择数字：";
        System.out.print(menu);
        Object[] menuList = {1,2,3,4,9};
        int selectNum = Integer.parseInt(getInputValue(INT_TYPE,menuList).toString());
        switch (selectNum) {
            case 1:
                calculator();
                break;
            case 2:
                shuiXianHua();
                break;
            case 3:
                diamondOutput();
                break;
            case 4:
                people();
                break;
            case 9:
                System.out.print("系统退出啦！！！！");
                System.exit(0); //System.exit(0)是正常退出程序，而System.exit(1)或者说非0表示非正常退出程序。
                break;
        }
    }


    //计算器
    public static void calculator() {
        System.out.println("欢迎使用tutu的计算器");
        String record = "";

        while (true) {
            Scanner scanner = new Scanner(System.in);
            System.out.println("请输入第一个数字");
            double num1 = scanner.nextDouble();

            System.out.println("请输入运算符");
            String op = scanner.next();

            System.out.println("请输入第二个数字");
            double num2 = scanner.nextDouble();

            double result = 0.0;
            switch (op) {
                case "+":
                    result = num1 + num2;
                    break;
                case "-":
                    result = num1 - num2;
                    break;
                case "*":
                    result = num1 * num2;
                    break;
                case "/":
                    result = num1 / num2;
                    break;
            }
            System.out.printf("您输入的%.2f%s%.2f=%.2f", num1, op, num2, result);
            System.out.print("\n是否继续（Y/N）");
            String isContinue = scanner.next();
            if (!"Y".equals(isContinue.toUpperCase())) {
                break;
            }
        }
        myMenu();
    }

    //水仙花
    public static void shuiXianHua() {
        for (int num = 100; num < 1000; num++) {
            String snum = String.valueOf(num);
            Double n1 = Double.parseDouble(snum.substring(0, 1));
            Double n2 = Double.parseDouble(snum.substring(1, 2));
            Double n3 = Double.parseDouble(snum.substring(2, 3));
            if (((n1 * n1 * n1) + (n2 * n2 * n2) + (n3 * n3 * n3)) == Integer.parseInt(snum)) {
                System.out.println(snum + " 是水仙花数 \n");
            }
        }
        myMenu();
    }

    //菱形图案
    public static void diamondOutput() {

    }

    //人员管理
    public static void people() {
        System.out.println("欢迎使用人员管理系统");
        String[] baseList = {"姓名", "年龄", "生日", "地址"};
        Object[] genderList = {"男", "女"};

        ArrayList peopleList = new ArrayList();

        StringBuffer people;
        while (true) {
            people = new StringBuffer();
            for (String base : baseList) {
                System.out.print("请输入" + base + ":");
                if (base.equals("性别")) {
                    people.append(getInputValue(STRING_TYPE,genderList).toString());
                }else if (base.equals("出生日期")){
                    people.append(getInputValue(DATE_TYPE).toString());
                }else {
                    people.append(getInputValue(STRING_TYPE).toString());
                }
                people.append(SPLIT);
            }
            peopleList.add(people);
            if(!isContinue()){
                break;
            }

        }


    }
}