JAVA基础：学生管理系统_java基础学生管理系统

借鉴黑马程序员java经典入门

1.创建学生类：

package project1StudentManager;
 
public class student {
    private String id;
    private String name;
    private String age;
    private String address;
    //ALT+INS
    public student() {
    }
 
    public student(String id, String name, String age, String address) {
        this.id = id;
        this.name = name;
        this.age = age;
        this.address = address;
    }
 
    public String getId() {
        return id;
    }
 
    public void setId(String id) {
        this.id = id;
    }
 
    public String getName() {
        return name;
    }
 
    public void setName(String name) {
        this.name = name;
    }
 
    public String getAge() {
        return age;
    }
 
    public void setAge(String age) {
        this.age = age;
    }
 
    public String getAddress() {
        return address;
    }
 
    public void setAddress(String address) {
        this.address = address;
    }
}

2.创建学生测试类：

package project1StudentManager;
 
import java.util.ArrayList;
import java.util.Scanner;
 
public class studentmanager {
    public static void main(String[] args) {
 
        ArrayList<student> array = new ArrayList<student>();
 
        while (true) {
            System.out.println("--------欢迎使用学生管理系统--------");
            System.out.println("1.添加学生信息");
            System.out.println("2.删除学生信息");
            System.out.println("3.修改学生信息");
            System.out.println("4.查看某个学生信息");
            System.out.println("5.查看所有学生信息");
            System.out.println("6.退出");
 
            System.out.println("请输入你要选择的功能编号：");
            Scanner sc = new Scanner(System.in);
            int i = sc.nextInt();
            if (i == 1){
                addStudent(array);
            }else if (i == 2){
                deleStudent(array);
            }else if (i == 3){
                modifyStudent(array);
            }else if (i == 4){
                seeStudent(array);
            }else if (i == 5){
                findallStudent(array);
            }
            else if (i == 6){
                System.out.println("谢谢使用");
                break;
            }else {
                System.out.println("你输入的编号有误，请重新输入");
            }
 
        }
    }
 
    //添加学生信息
    public static void addStudent(ArrayList<student> array){
        Scanner sc = new Scanner(System.in);
        System.out.println("请输入学生学号：");
        String id = sc.nextLine();
        int index = -1;
        for (int i = 0;i < array.size();i++){
            student s = array.get(i);
            if(s.getId().equals(id));
            index = 1;
            System.out.println("学号重复");
            break;
        }
        if (index ==-1){
            System.out.println("请输入学生姓名：");
            String name = sc.nextLine();
            System.out.println("请输入学生年龄：");
            String age = sc.nextLine();
            System.out.println("请输入学生地址：");
            String address = sc.nextLine();
            student s = new student();
            s.setId(id);
            s.setName(name);
            s.setAge(age);
            s.setAddress(address);
            array.add(s);
            System.out.println("添加学生信息成功");
        }
    }
    //通过学生学号删除学生信息
    public static void deleStudent(ArrayList<student> array){
        Scanner sc = new Scanner(System.in);
        System.out.println("请输入学生学号：");
        String id = sc.nextLine();
        int index = -1;
        for (int i = 0;i < array.size();i++){
            student s = array.get(i);      //遍历列表，得到所有学生信息
            if(s.getId().equals(id)){
                index = 1;
                array.remove(i);
                System.out.println("删除学生信息成功");
            }
        }
        if (index == -1){
            System.out.println("你输入的学号有误");
        }
 
 
    }
    //通过学生学号修改学生信息-------
    public static void modifyStudent(ArrayList<student> array){
        Scanner sc = new Scanner(System.in);
        System.out.println("请输入你要修改的学生学号：");
        String id = sc.nextLine();
 
 
        int index = -1;
        for (int i = 0;i < array.size();i++){
            student s = array.get(i);
            if(s.getId().equals(id)){
                index = 1;
                System.out.println("请输入新的学生姓名：");
                String name = sc.nextLine();
                System.out.println("请输入新的学生年龄：");
                String age = sc.nextLine();
                System.out.println("请输入新的学生地址：");
                String address = sc.nextLine();
                //创建学生对象
                student s1 = new student();
                s1.setId(id);
                s1.setName(name);
                s1.setAge(age);
                s1.setAddress(address);
                array.set(i,s1);        //修改array数组第i个位置的数据
                System.out.println("修改学生信息成功");
                break;
                }
        }
        if(index == -1) {
            System.out.println("你输入的学号有误");
        }
 
    }
    //通过学号查看学生信息
    public static void seeStudent(ArrayList<student> array){
        Scanner sc = new Scanner(System.in);
        System.out.println("请输入你要查看的学生学号");
        String id = sc.nextLine();
        int index = -1;     //判断输入的学号是否有误
        for (int i = 0;i < array.size();i++){
            student s = array.get(i);
            if(s.getId().equals(id)){
                index = 1;
                System.out.println("学号\t\t\t\t姓名\t\t年龄\t\t地址");
                System.out.println(s.getId()+"\t"+s.getName()+"\t\t"+s.getAge()+"\t\t"+s.getAddress());
                break;
            }
        }
        if (index ==-1){
            System.out.println("你输入的学号有误");
        }
 
    }
    //查看所有学生信息
    public static void findallStudent(ArrayList<student> array){
        if(array.size() == 0){
            System.out.println("无学生信息，请先添加再查看");
        }else {
            System.out.println("学号\t\t\t\t姓名\t\t年龄\t\t地址");
            for (int i = 0;i < array.size();i++){
                student s = array.get(i);
                System.out.println(s.getId()+"\t"+s.getName()+"\t\t"+s.getAge()+"\t\t"+s.getAddress());
            }
        }
    }
}