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
