用java写的学生信息管理系统（基础，入门）

用java写的学生信息管理系统

使用到了集合类ArrayLisat 来对Student类的对象进行存储。

StudentManagerTest为主类，Student类里面进行了相应数据的封装。里面用了很多循环来写，并且运用了很多标记来进行判断是否退出循环，如flag和index。

创建集合类对象格式：
ArrayList array= new ArrayList();在传递方法的时候需要在形参列表中用<>对传递的类型进行明确

主类

	    package zjh;
		import java.util.ArrayList;
		import java.util.Scanner;
		
		public class StudentManageTest {
		public static void main(String[] args) {
		ArrayList<Student> array = new ArrayList<Student>();
	
		while(true) {
		System.out.println("----欢迎来到学生信息管理系统----");
		System.out.println("请输入你想要进行的操作");
		System.out.println("1:查看所有学生信息");
		System.out.println("2:添加学生信息");
		System.out.println("3:删除学生信息");
		System.out.println("4:修改学生信息");
		System.out.println("5:退出");
		
		Scanner scanner = new Scanner(System.in);
		
		String choice = scanner.nextLine();
		


		switch (choice) {
		case "1":
			findAllStudents(array);
			break;
		case "2":
			addStudent(array);
			break;
		case "3":
			deleteStudent(array);
			break;
		case "4":
			updateStudent(array);
			break;
		case "5":
		default:
			System.out.println("正在退出系统，欢迎下次继续使用");
			break;
		}
		
	}
	}
	//修改学生信息
	public static void updateStudent(ArrayList<Student> array) {
		Scanner scanner = new Scanner(System.in);
		while(true) {
		System.out.println("请输入你要修改的学号：");
		String id = scanner.nextLine();
		int index = -1;
		for(int x=0; x<array.size(); x++) {
			Student student = array.get(x);
			if(student.getId().equals(id)) {
				index = x;
				break;
			}
		}
		if(index ==-1) {
			System.out.println("您输入的学号有误请重新输入");
			continue;
		}else {
			System.out.println("请输入新的姓名：");
			String name = scanner.nextLine();
			System.out.println("请输入新的年龄：");
			String age = scanner.nextLine();
			System.out.println("请输入新的地址");
			String address = scanner.nextLine();
			
			Student student = new Student();
			student.setId(id);
			student.setName(name);
			student.setAge(age);
			student.setAddress(address);
			
			array.set(index, student);
			break;
			}
		}
		System.out.println("修改学生成功");
		
	}
	
	//删除学生信息
	public static void deleteStudent(ArrayList<Student> array) {
		Scanner scanner = new Scanner(System.in);
		while(true) {
		System.out.println("请输入你要删除的学号");
		
		String id = scanner.nextLine();
		int index = -1;
		
	    for(int x=0; x<array.size(); x++) {
	    	Student student = array.get(x);
	    	if (student.getId().equals(id)) {
	    		index = x;
	    		break;
	    	}
	    }
	    if(index == -1) {
	    	System.out.println("您输入的学号有误 请重新输入");
	    	continue;
	    }else {
	    	array.remove(index);
	    	break;
	    }
		}
		System.out.println("删除学生信息成功！");
	}
	
	//添加学生信息
	public static void addStudent(ArrayList<Student> array) {
		Scanner scanner = new Scanner(System.in);
		String id;
		while(true) {
		System.out.println("请输入你要添加的学号:");
		int flag =0;
		id = scanner.nextLine();
		for(int x=0; x<array.size(); x++) {
			Student student =array.get(x);
			if(student.getId().equals(id)) {
				System.out.println("你输入的学号已被占用，请重新输入");
				break;
			}else {
				flag++;
			}
			}
		if(flag==array.size()) {
			break;
		}
		}
		System.out.println("请输入你要添加的姓名：");
		String name = scanner.nextLine();
		System.out.println("请输入你要添加的年龄：");
		String age = scanner.nextLine();
	    System.out.println("请输入你要添加的地址：");
	    String address = scanner.nextLine();
		Student student = new  Student();
		student.setId(id);
		student.setName(name);
		student.setAge(age);
		student.setAddress(address);
		
		array.add(student);
		
		
		System.out.println("添加信息成功");
		
	}

	
	//查看所有学生信息
	public static void findAllStudents(ArrayList<Student> array) {
		if(array.size()==0) {
			System.out.println("当前没有任何学生信息，请添加后再使用");
		}
		System.out.println("学号\t\t姓名\t年龄\t居住地");
		for(int x=0; x<array.size(); x++) {
			Student s = array.get(x);
			System.out.println(s.getId()+"\t"+s.getName()+"\t"+s.getAge()+"\t"+s.getAddress());
		}
	}
}

Student类

   package zjh;
	public class Student {
	private String id;
	private String name;
	private String age;
	private String address;
	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;
	}
	}

接下来的是进行实际操作的一些样例展示