public class main {
public static void main(String[] args){
Index ui = new Index();
ui.index();
}
}
import java.util.Scanner;
public class Index {
Scanner scanner = new Scanner(System.in);
management management = new management();
void index(){
System.out.println("----------------学生管理系统------------------");
System.out.println("1.学生注册");
System.out.println("2.学生注销");
System.out.println("3.查阅学生信息");
System.out.println("4.列出所有学生信息");
System.out.println("5.退出");
System.out.println("-----------------------------------------");
System.out.println("请输入1-5:");
int select = 0;
select = scanner.nextInt();
select(select);
}
void select(int n){
switch(n){
case 1:
register();
break;
case 2:
cancel();
break;
case 3:
check_one();
break;
case 4:
check_all();
break;
case 5:
exit();
break;
default:
break;
}
}
private void register() {
String name = "";
String department="";
System.out.println("学生管理>>新生注册");
while (true){
System.out.println("请输入学生姓名:");
name = scanner.next();
System.out.println("请输入院系名称:");
department = scanner.next();
boolean result=management.regisStudent(name, department);
if(result == true){
System.out.println("注册成功。");
}
else{
System.out.println("注册失败。");
}
System.out.println("输入y继续,输入n返回主菜单");
String input = scanner.next();
if(input.equalsIgnoreCase("n")){
return;
}
}
}
void cancel(){
System.out.println("学生管理>>学生注销");
while(true){
System.out.println("请输入学生编号:");
int num=scanner.nextInt();
boolean temp=management.unregisStudent(num);
if(temp){
System.out.println("注销成功");
}
else{
System.out.println("注销失败");
}
System.out.println("输入y继续,输入n返回主菜单");
if(scanner.next().equalsIgnoreCase("n"))
return;
}
}
void check_all(){
while(true){
System.out.println(management.getAllStudentsInfo());
System.out.println("输入y刷新,输入n返回主菜单:");
if(scanner.next().equalsIgnoreCase("n"))
return;
}
}
void check_one(){
while(true){
int num = 0;
System.out.println("请输入要查询的学生编号:");
management.getStudentInfo(num);
if(scanner.next().equalsIgnoreCase("n"))
return;
}
}
void exit(){
return;
}
}
public class Student {
private static int sid=1;
private int id;
private String name;
private String department;
public Student(String name, String department) {
if(name.equals("")||department.equals(""))
return;
this.name = name;
this.department = department;
id=sid++;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getDepartment() {
return department;
}
public void setDepartment(String department) {
this.department = department;
}
public int getId() {
return id;
}
}
public class DataBase {
Student[] student_database = new Student[100];
private int point = 0;
boolean push_new_student(String name,String department){
boolean temp = false;
if(name == null){
return temp;
}
student_database[3].setName("wwww");
student_database[4].setDepartment("tsts");
student_database[point].setName(name);
student_database[point].setDepartment(department);
System.out.println(student_database[point].getName());
temp = true;
point++;
return temp;
}
/*Student pop_student(int num){
Student temp = null;
if(num>=point){
System.out.println("error!!");
return temp;
}
temp.setDepartment(student_database[point].getDepartment());
temp.setName(student_database[point].getName());
point--;
return temp;
}*/
boolean pop_student(int num){
boolean temp = false;
if(num>=point){
return temp;
}
student_database[point] = null;
point--;
return temp;
}
Student[] list_all_student(){
Student[] temp = new Student[point];
for(int i=0;i<point;i++){
temp[point].setDepartment(student_database[point].getDepartment());
temp[point].setName(student_database[point].getName());
}
return temp;
}
Student search_one(int num){
Student temp = null;
if(num >= point){
System.out.println("error!!");
return temp;
}
temp.setDepartment(student_database[num].getDepartment());
temp.setName(student_database[num].getName());
return temp;
}
}
class management {
private DataBase dbms = new DataBase();
boolean regisStudent(String name,String department){
boolean temp = false;
if(name == " "||department=="")
return temp;
temp=dbms.push_new_student(name,department);
return temp;
}
public boolean unregisStudent(int id){
boolean temp = false;
if(id>0)
temp = dbms.pop_student(id);
return temp;
}
public String getStudentInfo(int id){
String temp = "\t\t学生信息\n-----------------------------------------\n";
temp += "编号\t 姓名\t 专业\n";
Student student = dbms.search_one(id);
if (student != null){
temp += String.format("%s\t %s\t %s\n",
student.getId(),student.getName(),
student.getDepartment());
}
return temp;
}
public String getAllStudentsInfo(){
String temp ="\t\t学生信息\n-------------------------------------------\n";
temp += "编号\t姓名\t专业\n";
Student[] all = dbms.list_all_student();
if(all !=null){
for (Student student : all){
if(student == null)
continue;
temp += String.format("%s\t %s\t %s\n",
student.getId(),student.getName(),
student.getDepartment());
}
}
return temp;
}
}