package 信息管理系统;

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
import java.util.Scanner;
import java.util.Set;
import java.util.TreeSet;

public class StudentManageSystem {

    /** StudentManager中提供的操作菜单 * */

    public static void showMenus() {

        String format = "              %s\n";

        System.out.println("----------------功能菜单------------------");

        System.out.printf(format, "0. 退出管理");

        System.out.printf(format, "1. 功能菜单");

        System.out.printf(format, "2. 显示学生");

        System.out.printf(format, "3. 查询学生");

        System.out.printf(format, "4. 添加学生");

        System.out.printf(format, "5. 删除学生");

        System.out.printf(format, "6. 修改学生");

        System.out.printf(format, "7. 读取学生");

        System.out.printf(format, "8. 保存学生");

        System.out.println("-------------------结束------------------");

        System.out.println();

    }

    /** 管理学生信息 * */

    public void manageStudents() throws IOException {

        Scanner scanner = new Scanner(System.in);

        StudentDao sd = new StudentDao();

        StudentService ss = new StudentService(sd, scanner);

        showMenus();

        int op = -1;

        while (op != 0) {

            System.in.skip(System.in.available());

            System.out.print("输入菜单编号: ");

            op = scanner.nextInt();

            scanner.nextLine(); // 吃掉输入菜单编号后无效的回车字符

            try {

                switch (op) {

                case 0:

                    break;

                case 1:

                    showMenus();

                    break;

                case 2:

                    ss.showStudents();

                    break;

                case 3:

                    ss.findStudents();

                    break;

                case 4:

                    ss.addStudent();

                    break;

                case 5:

                    ss.removeStudent();

                    break;

                case 6:

                    ss.updateStudent();

                    break;

                case 7:

                    ss.readStudents();

                    break;

                case 8:

                    ss.saveStudents();

                    break;

                default:

                    System.out.println("没有提供此项操作\n");

                }

            } catch (Exception e) {

                System.out.println("\t" + e.getMessage() + "\n");

            }

        }

    }

    public static void main(String[] args) throws IOException {

        StudentManageSystem sm = new StudentManageSystem();

        sm.manageStudents();

        System.out.println("程序结束");

    }

}

/** Service中的很多功能都是委托给Dao对象去完成 * */

class StudentService {

    private StudentDao studentDao;

    private Scanner scanner;

    public StudentService(StudentDao studentDao, Scanner scanner) {

        this.studentDao = studentDao;

        this.scanner = scanner;

    }

    // 添加学生

    public void addStudent() {

        System.out.print