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云代码 - java代码库

学生管理系统

2019-12-25 作者： 小江爱酒窝举报

[java]代码库

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package com.iflytek.studentmanagesystem.view;
 
import java.util.Comparator;
import java.util.List;
import java.util.Scanner;
 
import com.iflytek.studentmanagesystem.pojo.Student;
import com.iflytek.studentmanagesystem.service.StudentService;
import com.iflytek.studentmanagesystem.service.impl.StudentServiceImpl;
import com.iflytek.studentmanagesystem.util.DateUtil;
 
public class MainClass {
 
    public static void main(String[] args) {
        while (true) {
            System.out.println("#######欢迎使用xxxx学生管理系统#######");
            System.out.println("1.增加学生信息\n2.删除学生信息\n3.修改学生信息\n4.查询学生信息\n0.退出系统\n请选择：");
            Scanner sc = new Scanner(System.in);
            int select = sc.nextInt();
            if (select == 0) {
                break;
            } else if (select == 1) {
                doAddStudent();
            } else if (select == 2) {
                doDeleteStudent();
            } else if (select == 3) {
                doModifyStudent();
            } else if (select == 4) {
                doQeuryStudent();
            } else {
                System.out.println("错误的功能代码！");
            }
        }
    }
 
      
    private static void doAddStudent() {
        // TODO Auto-generated method stub
        StudentService service = new StudentServiceImpl();
        Scanner sc = new Scanner(System.in);
        System.out.println("输入要新增的学生的学号：");
        int number = sc.nextInt();
        if (service.queryByNumber(number) != null) {
            System.out.println("该学号对应的学生信息已经存在！");
            return;
        }
        sc.nextLine(); // 消除前面输入整数留下的回车符
        System.out.println("输入要新增的学生姓名：");
        String name = sc.nextLine();
        System.out.println("请输入要新增的学生性别：");
        String gender = sc.nextLine();
        System.out.println("请输入要新增的学生出生日期（如1990-1-1）：");
        String birthday = sc.nextLine();
        System.out.println("请输入要新增的学生入学日期（如2019-9-1）：");
        String entranceday = sc.nextLine();
 
        Student stu = new Student();
        stu.setNumber(number);
        stu.setName(name);
        stu.setGender(gender);
        stu.setBirthday(DateUtil.str2date(birthday));
        stu.setEntranceday(DateUtil.str2date(entranceday));
 
        if (1 == service.add(stu)) {
            System.out.println("学生信息新增完成！");
        } else {
            System.out.println("学生信息增加失败！");
        }
    }
 
 
    private static void doDeleteStudent() {
        StudentService service = new StudentServiceImpl();
        Scanner sc = new Scanner(System.in);
        System.out.println("输入要删除的学生的学号：");
        int number = sc.nextInt();
        if (0 == service.delete(number)) {
            System.out.println("学生信息不存在，删除失败！");
        } else {
            System.out.println("学生信息删除完成！");
        }
    }
 
    private static void doModifyStudent() {
        StudentService service = new StudentServiceImpl();
        Scanner sc = new Scanner(System.in);
        System.out.println("输入要修改的学生的学号：");
        int number = sc.nextInt();
        if (service.queryByNumber(number) == null) {
            System.out.println("该学号对应的学生信息不存在，无法修改！");
            return;
        }
        sc.nextLine();
        System.out.println("输入要修改的学生新的姓名：");
        String name = sc.nextLine();
        System.out.println("请输入要修改的学生新的性别：");
        String gender = sc.nextLine();
        System.out.println("请输入要修改的学生新的出生日期（如1990-1-1）：");
        String birthday = sc.nextLine();
        System.out.println("请输入要修改的学生新的入学日期（如2019-9-1）：");
        String entranceday = sc.nextLine();
 
        Student stu = new Student();
        stu.setNumber(number);
        stu.setName(name);
        stu.setGender(gender);
        stu.setBirthday(DateUtil.str2date(birthday));
        stu.setEntranceday(DateUtil.str2date(entranceday));
 
        if (1 == service.modify(stu)) {
            System.out.println("学生信息修改完成！");
        } else {
            System.out.println("学生信息修改失败！");
        }
 
    }
 
    private static void doQeuryStudent() {
        StudentService service = new StudentServiceImpl();
        while (true) {
            System.out.println("1.按学号查询\n2.按姓名查询\n3.查看所有\n4.按年龄降序查看所有\n0.返回\n请选择：");
            Scanner sc = new Scanner(System.in);
            int select = sc.nextInt();
            if (select == 0) {
                break;
            } else if (select == 1) {
                System.out.println("输入要查询的学生的学号：");
                int number = sc.nextInt();
                Student stu = service.queryByNumber(number);
                if (stu == null) {
                    System.out.println("未查询到相关信息");
                } else {
                    System.out.println("查询到学生的信息：\n" + stu);
                }
            } else if (select == 2) {
                System.out.println("输入要查询的学生的姓名：");
                String name = sc.next();
                List<Student> stus = service.queryByName(name);
                if (stus.size() == 0) {
                    System.out.println("未查询到相关信息");
                } else {
                    System.out.println("查询到学生的信息：");
                    for (int i = 0; i < stus.size(); i++) {
                        System.out.println(stus.get(i));
                    }
                }
            } else if (select == 3) {
                System.out.println("所有学生的信息：");
                List<Student> stus = service.queryAll();
                for (int i = 0; i < stus.size(); i++) {
                    System.out.println(stus.get(i));
                }
            } else if (select == 4) {
                System.out.println("按年龄降序排列学生的信息：");
                List<Student> stus = service.queryAll();
                stus.sort(new Comparator<Student>() {
 
                    @Override
                    public int compare(Student o1, Student o2) {
                        return (int) (o2.getBirthday().getTime() - o1.getBirthday().getTime());
                    }
                });
                for (int i = 0; i < stus.size(); i++) {
                    System.out.println(stus.get(i));
                }
            } else {
                System.out.println("错误的功能代码！");
            }
        }
    }
 
}

[代码运行效果截图]


学生管理系统

[源代码打包下载]




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