利用java基础知识，数组，函数，对象等等，实现简单的，控制台学生信息管理系统。
功能分为教师用户的注册、登录和退出登录，教师用户对学生信息的增删改查操作。
学生类public class Student {
String name;//姓名
String sno;//学号
int score;//分数
public Student() {
super();
}
public Student(String name, String sno, int score) {
super();
this.name = name;
this.sno = sno;
this.score = score;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getSno() {
return sno;
}
public void setSno(String sno) {
this.sno = sno;
}
public int getScore() {
return score;
}
public void setScore(int score) {
this.score = score;
}
@Override
public String toString() {
return "Student [name=" + name + ", sno=" + sno + ", score=" + score + "]";
}
}
教师类
public class Teacher {
String username;//账号
String password;//密码
public Teacher() {
super();
}
public Teacher(String username, String password) {
super();
this.username = username;
this.password = password;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
@Override
public String toString() {
return "Teacher [username=" + username + ", password=" + password + "]";
}
}
系统业务类
import java.util.Scanner;
public class StudentService {
//默认系统中三个学生
private static Student[] student = new Student[] { new Student("zs", "1001", 99),
new Student("lisi", "1002", 98),
new Student("wangwu","1003",90)};
private static Teacher[] teacher = new Teacher[]{};
private static Scanner sc = new Scanner(System.in);
//开始
public static void start() {
System.out.println("*******************************************");
System.out.println("***tt菜单ttt***");
System.out.println("***tt1--注册ttt***");
System.out.println("***tt2--登录ttt***");
System.out.println("***tt其它任意键退出tt***");
System.out.println("*******************************************");
//Scanner sc = new Scanner(System.in);
System.out.println("请输入对应编号进行操作：");
String key = sc.next();
switch (key) {
case "1":
register();
break;
case "2":
login();
break;
default:
end();
break;
}
}
//注册
private static void register() {
System.out.println("************t正在注册t*******************");
System.out.print("请输入账号：");
String username = sc.next();
System.out.print("请输入密码：");
String password = sc.next();
Teacher[] teacher2 = new Teacher[teacher.length + 1];
for (int i = 0; i < teacher2.length; i++) {
if (i < teacher.length) {
teacher2[i] = new Teacher(teacher[i].getUsername(), teacher[i].getPassword());
} else {
teacher2[i] = new Teacher(username,password);
}
}
teacher = teacher2;
System.out.println("注册成功！！");
login();
}
//登录
private static void login() {
System.out.println("************t正在登录t*******************");
System.out.print("请输入账号：");
String username = sc.next();
System.out.print("请输入密码：");
String password = sc.next();
boolean flag = false;
for (int i = 0; i < teacher.length; i++) {
if (username.equals(teacher[i].getUsername()) && password.equals(teacher[i].getPassword())) {
System.out.println("登录成功！！");
flag = true;
}
}
if (flag) {
loginSuccess();
}else {
System.out.println("用户名或密码错误！！");
}
System.out.println("继续请按1，其它任意键返回");
String s = sc.next();
if (s.equals("1")) {
login();
} else {
start();
}
}
//登录成功首页
private static void loginSuccess() {
System.out.println("*******************************************");
System.out.println("***tt学生信息管理系统tt***");
System.out.println("***tt1--查询全部tt***");
System.out.println("***tt2--增加ttt***");
System.out.println("***tt3--删除ttt***");
System.out.println("***tt4--修改ttt***");
System.out.println("***tt其它任意键退出tt***");
System.out.println("*******************************************");
System.out.println("请输入对应编号进行操作：");
String key = sc.next();
switch (key) {
case "1":
find();
break;
case "2":
insert();
break;
case "3":
delete();
break;
case "4":
update();
break;
default:
start();
}
}
//修改信息
private static void update() {
System.out.println("正在修改学生信息");
System.out.print("请输入要修改学生的姓名或学号：");
String info = sc.next();
boolean flag = false;
Student stu = null;
for (int i = 0; i < student.length; i++) {
if (info.equals(student[i].getName()) || info.equals(student[i].getSno())) {
System.out.println("姓名tt学号tt分数");
System.out.println(student[i].getName() + "tt" + student[i].getSno() + "tt" + student[i].getScore());
stu = student[i];
flag = true;
}
}
boolean is = true;
while (is) {
if (flag) {
System.out.println("修改姓名请按1，修改学号请按2，修改分数请按3，其它任意键退出");
String key = sc.next();
switch (key) {
case "1":
System.out.println("请输入姓名：");
String name = sc.next();
stu.setName(name);
System.out.println("修改成功！！");
break;
case "2":
System.out.println("请输入学号：");
String sno = sc.next();
stu.setSno(sno);
System.out.println("修改成功！！");
break;
case "3":
System.out.println("请输入分数：");
int score = sc.nextInt();
stu.setScore(score);
System.out.println("修改成功！！");
break;
default:
is = false;
break;
}
} else {
System.out.println("未查询到此学生！！");
is = false;
}
}
loginSuccess();
}
//删除信息
private static void delete() {
System.out.println("正在删除学生信息");
System.out.print("请输入要删除学生的姓名或学号：");
String info = sc.next();
boolean flag = false;
for (int i = 0; i < student.length; i++) {
if (info.equals(student[i].getName()) || info.equals(student[i].getSno())) {
Student stu = student[i];
student[i] = student[student.length - 1];
student[student.length - 1] = stu;
flag = true;
}
}
if (flag) {
Student[] student2 = new Student[student.length - 1];
for (int i = 0; i < student2.length; i++) {
student2[i] = new Student(student[i].name, student[i].sno, student[i].score);
}
student = student2;
System.out.println("删除成功！！");
} else {
System.out.println("未查询到此学生，删除失败！！");
}
loginSuccess();
}
//添加信息
private static void insert() {
System.out.println("正在添加学生信息");
System.out.print("请输入学生姓名：");
String name = sc.next();
System.out.print("请输入学生学号：");
String sno = sc.next();
System.out.print("请输入学生分数：");
int score = sc.nextInt();
Student[] student2 = new Student[student.length + 1];
for (int i = 0; i < student2.length; i++) {
if (i < student.length) {
student2[i] = new Student(student[i].name, student[i].sno, student[i].score);
} else {
student2[i] = new Student(name, sno, score);
}
}
student = student2;
System.out.println("添加成功！！");
loginSuccess();
}
//查询所有学生
private static void find() {
System.out.println("*******************************************");
System.out.println("tt--学生信息--");
System.out.println("姓名tt学号tt分数");
for (int i = 0; i < student.length; i++) {
System.out.println(student[i].getName() + "tt" + student[i].getSno() + "tt" + student[i].getScore());
}
System.out.println("*******************************************");
loginSuccess();
}
//退出
private static void end() {
System.out.println("退出成功！！！");
}
}
测试类
public class Test {
public static void main(String[] args) {
StudentService.start();//开始
}
}
运行结果
注册登录
查询
添加、删除、修改
