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简单的选课管理系统

2020年07月17日 | 移动技术网IT编程 | 我要评论

需求：学生、老师可以选择课程，学生选课分数须达到3分以上

import java.util.ArrayList;
import java.util.List;
/**
 * @author wujun
 * @create 2020-07-02 17:06
 * 学生类：学生必须选满课程学分3分才能达到要求
 */
public class Student implements IMember {
    private String stu_num; //学号
    private String name; //姓名
    private int age; //年龄
    private String address; //地址
    private String sex; //性别
    private double grade = 0; //拥有学分
    private List<Course> courses; //所选课程


    public Student(String stu_num, String name, int age, String address, String sex) {
        this.stu_num = stu_num;
        this.name = name;
        this.age = age;
        this.address = address;
        this.sex = sex;
        courses = new ArrayList<>();
    }

    public String getStu_num() {
        return stu_num;
    }

    public void setStu_num(String stu_num) {
        this.stu_num = stu_num;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }

    public String getAddress() {
        return address;
    }

    public void setAddress(String address) {
        this.address = address;
    }

    public String getSex() {
        return sex;
    }

    public void setSex(String sex) {
        this.sex = sex;
    }

    public List<Course> getCourses() {
        return courses;
    }

    public void setCourses(List<Course> courses) {
        this.courses = courses;
    }

    @Override
    public String toString() {
        return "Student{" +
                "stu_num='" + stu_num + '\'' +
                ", name='" + name + '\'' +
                ", age=" + age +
                ", address='" + address + '\'' +
                ", sex='" + sex + '\'' +
                ", courses=" + courses +
                '}';
    }

    //添加课程
    public void addCourse(Course course){

        if (course !=null){
            this.courses.add(course);
            System.out.println(this.name+"新增课程："+course.getName());
            //将课程设置为已被选中
            course.setSelect(true);
            this.grade = this.grade+course.grade;
            System.out.println("学生"+this.name+"学分为："+this.grade);
            if (this.grade<3){
                System.out.println("学生"+this.name+"选课的学分未达到标准！！");
            }else {
                System.out.println("学生"+this.name+"选课学分已够");
            }
        }
    }

    //移除课程
    public void removeCourse(String name){
        if (name != null){
            try {
                for (Course cours : courses) {
                    if (cours.getName().equals(name)){
                        courses.remove(cours);
                        this.grade=this.grade-cours.grade;
                        System.out.println("学生"+this.name+"移除了"+cours.getName());
                        System.out.println("学生"+this.name+"学分为："+this.grade);
                        if (this.grade<3){
                            System.out.println("学生"+this.name+"选课的学分未达到标准！！");
                        }else {
                            System.out.println("学生"+this.name+"选课学分已够");
                        }
                    }
                }
            }catch (Exception e){
                System.out.print("");
            }
        }
    }
}

/**
 * @author wujun
 * @create 2020-07-02 17:53
 *
 */
public class Course {
    public static final String GAOSHU="高数";
    public static final String Computer="计算机基础";
    public static final String DataBase="数据库原理";
    public static final String Engilsh="英语";
    public static final String JAVA="java语言";
    public static final String Internet="网络原理";

    private String cour_num;  //课程号
    private String name; //课程名
    private int time;//课时
    protected double grade; //学分
    private boolean isSelect; //是否被选

    public Course(String number,String name){
        this.isSelect=false; //默认课程没有选中
        this.name  = name;
        this.cour_num = number;
        if (name.equals("高数")){
            this.grade=1.0;
            this.time=48;
        }if (name.equals("计算机基础")){
            this.grade=0.5;
            this.time=16;
        }if (name.equals("数据库原理")){
            this.grade=1.5;
            this.time=18;
        }if (name.equals("英语")){
            this.grade=1.0;
            this.time=20;
        }if (name.equals("java语言")){
            this.grade=1.0;
            this.time=52;
        }if (name.equals("网络原理")){
            this.grade=1.0;
            this.time=32;
        }
    }

    public String getCour_num() {
        return cour_num;
    }

    public void setCour_num(String cour_num) {
        this.cour_num = cour_num;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public boolean isSelect() {
        return isSelect;
    }

    public void setSelect(boolean select) {
        isSelect = select;
    }

    public int getTime() {
        return time;
    }

    public void setTime(int time) {
        this.time = time;
    }

    public double getGrade() {
        return grade;
    }

    public void setGrade(double grade) {
        this.grade = grade;
    }

    @Override
    public String toString() {
        return "Course{" +
                "cour_num='" + cour_num + '\'' +
                ", name='" + name + '\'' +
                ", time=" + time +
                ", grade=" + grade +
                ", isSelect=" + isSelect +
                '}';
    }
}

import com.wujun.dao.IMember;

import java.util.List;

/**
 * @author wujun
 * @create 2020-07-02 19:08
 */
public class Teacher implements IMember {
    private String tea_num; //教师号
    private String name; //姓名
    private int age; //年龄
    private String  duties; //职务

    private List<Course> courses; //所教课程

    public Teacher(String tea_num, String name, int age, String duties) {
        this.tea_num = tea_num;
        this.name = name;
        this.age = age;
        this.duties = duties;
    }

    public String getTea_num() {
        return tea_num;
    }

    public void setTea_num(String tea_num) {
        this.tea_num = tea_num;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }

    public String getDuties() {
        return duties;
    }

    public void setDuties(String duties) {
     this.duties = duties;
    }

    public List<Course> getCourses() {
        return courses;
    }

    public void setCourses(List<Course> courses) {
        this.courses = courses;
    }

    @Override
    public String toString() {
        return "Teacher{" +
                "tea_num='" + tea_num + '\'' +
                ", name='" + name + '\'' +
                ", age=" + age +
                ", duties='" + duties + '\'' +
                ", courses=" + courses +
                '}';
    }

    //添加课程
    public void addCourse(Course course){

        if (course !=null){
            this.courses.add(course);
            System.out.println("老师"+this.name+"新增课程："+course.getName());

        }
    }

    //移除课程
    public void removeCourse(String name){
        if (name != null){
            for (Course cours : courses) {
                if (cours.getName().equals(name)){
                    courses.remove(cours);
                    System.out.println("老师"+this.name+"移除了"+cours.getName());
                }
            }
        }
    }
}

import java.util.Collection;
import java.util.HashMap;
import java.util.Map;
/**
 * @author wujun
 * @create 2020-07-02 20:38
 * 课程功能类
 */
public class CourseDao {
    private static Map<Integer, Course> courses = null;

    static {
        courses = new HashMap<Integer,Course>();

        courses.put(1001,new Course("1001",Course.Computer));
        courses.put(1002,new Course("1002",Course.DataBase));
        courses.put(1003,new Course("1003",Course.Engilsh));
        courses.put(1004,new Course("1004",Course.GAOSHU));
        courses.put(1005,new Course("1005",Course.Internet));
        courses.put(1006,new Course("1006",Course.JAVA));
    }

    //列出全部课程
    public Collection<Course> getCourses(){
        return courses.values();
    }

    //查找课程
    public Course getCourse(Integer id){
        return courses.get(id);
    }

//    public static void main(String[] args) {
//        System.out.println(courses.values());
//        System.out.println(courses.get(1001));
//    }
}


/**
 * @author wujun
 * @create 2020-07-03 10:37
 * 老师和学生公共接口
 */
public interface IMember {
    public void addCourse(Course course);
    public void removeCourse(String name);
}

测试：

import com.wujun.dao.CourseDao;
import com.wujun.ibz.Course;
import com.wujun.ibz.Student;

/**
 * @author wujun
 * @create 2020-07-03 10:39
 */
public class Test {
    public static void main(String[] args) {
        CourseDao courseDao = new CourseDao();
        System.out.println("查询全部课程信息");
        System.out.println(courseDao.getCourses());
        System.out.println("根据课程号查询课程信息");
        System.out.println(courseDao.getCourse(1002));

        Course course1 = new Course("1001", "计算机基础");
        Course course2 = new Course("1002", "数据库原理");
        Course course3 = new Course("1003","英语");


        Student student1 = new Student("0434", "张三", 18, "四川遂宁", "男");
        student1.addCourse(course1);
        student1.addCourse(course2);
        student1.addCourse(course3);
        student1.removeCourse("计算机基础");

        //Teacher teacher1 = new Teacher("2131","小丽",35,"教授");

    }
}

本文地址：https://blog.csdn.net/weixin_43480466/article/details/107356659

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简单的选课管理系统

2020年07月17日 | 移动技术网IT编程 | 我要评论

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