黑马JAVA学生管理系统

黑马JAVA学生管理系统

//学生类
package Test;

public class Student {
    private String name;
    private int age;
    private String id;
    private String are;

    public String getName() {
        return name;
    }

    public int getAge() {
        return age;
    }

    public String getId() {
        return id;
    }

    public String getAre() {
        return are;
    }

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

    public boolean setAge(int age) {
        if (age < 0 | age > 120) {
            return false;
        } else {
            this.age = age;
            return true;
        }
    }

    public void setId(String id)
    {
        this.id=id;
    }

    public void setAre(String are) {
        this.are = are;
    }

    public Student(String name, String id, String are) {
        this.name = name;
        this.id = id;
        this.are = are;
    }

    public Student() {
    }

    @Override
    public String toString() {
        return "Student{" +
                "name='" + name + '\'' +
                ", age=" + age +
                ", id='" + id + '\'' +
                ", are='" + are + '\'' +
                '}';
    }
}

//管理类
package Test;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.Scanner;
public class StudentsManger {
    public static void main(String[] args)
    {
        int option=0;
        Scanner sc=new Scanner(System.in);
        ArrayList students = new ArrayList<Student>();
        while(true)
        {
            System.out.println("-----欢迎来到学生管理系统------");
            System.out.println("1.添加学生");
            System.out.println("2.删除学生");
            System.out.println("3.修改学生");
            System.out.println("4.查看所有学生");
            System.out.println("5.退出");
            System.out.print("请输入你的选择:");
            if(sc.hasNextInt()==true)
            {
                option=sc.nextInt();
            }else{
                System.out.println("请输入正确的数字");
            }
            if(option==1)//添加学生
            {
                addStudents(students);

            }else if(option==2){//删除学生
                System.out.println("请输入要删除的学生id");
                String id=sc.nextLine();
                id=sc.nextLine();
                delStudents(students,id);
            }else if(option==3){//修改学生
                setStudents(students);
            }else if(option==4){//查看学生
                findAllStudents(students);
            }else if(option==5){
                System.out.println("谢谢使用");
                return;
            }else{
                System.out.println("请输入正确的数字");
            }
        }
    }
    public static void addStudents(ArrayList<Student> students)//添加学生
    {
        Scanner sc= new Scanner(System.in);
        System.out.println("请输入要添加的学生的姓名:");
        String name=sc.nextLine();
        System.out.println("请输入要添加的学生的学号:");
        String id=sc.nextLine();
        System.out.println("请输入要添加的学生的年龄:");
        int age=sc.nextInt();
        System.out.println("请输入要添加的学生的地址:");
        String are=sc.next();
        Student st= new Student(name,id,are);
        students.add(st);
        if(st.setAge(age))
        {
            System.out.println("添加成功!");
        }else {
            delStudents(students,id);
            System.out.println("添加失败，年龄不合实际");
        }


    }
    public static void delStudents(ArrayList<Student> students,String id)//删除学生
    {

        for(int i=0;i<students.size();i++)
        {
            Student st =students.get(i);
            if(id.equals(st.getId()))
            {
                students.remove(i);
                return;
            }
        }
        System.out.println("您搜索的学号不存在");

    }
    public static void setStudents(ArrayList<Student> students)//修改学生
    {
        Scanner sc= new Scanner(System.in);
        System.out.println("请输入要修改的学生id");
        String id=sc.nextLine();
        for(int i=0;i<students.size();i++)
        {
            Student st =students.get(i);
            if(id.equals(st.getId()))
            {
                int option=0;boolean l=false;
                System.out.println("请输入要修改的内容:1.全部 2.姓名 3.年龄 4.学号 5.地址");
                option=sc.nextInt();
                switch (option)
                {
                    case 1:

                    case 2:
                        System.out.println("请输入要修改的姓名:");
                        st.setName(sc.next());
                        if(option==2)break;
                    case 3:
                        System.out.println("请输入要修改的年龄:");
                        if(st.setAge(sc.nextInt()))l=true;
                        if(option==3)break;
                    case 4:
                        System.out.println("请输入要修改的学号:");
                        st.setId(sc.next());
                        if(option==4)break;
                    case 5:
                        System.out.println("请输入要修改的地址:");
                        st.setAre(sc.next());
                }
                System.out.println("修改成功");
                break;
            }
        }
    }
    public static void findAllStudents(ArrayList<Student> students)//查看学生
    {
        Iterator it = students.iterator();
        if(!it.hasNext())
        {
            System.out.println("暂无内容");
        }
        while(it.hasNext())
        {
            System.out.println(it.next());
        }
    }
}