package zzzzzzzz;
import java.io.*;
//作者：凯鲁嘎吉 - 博客园
//http://www.cnblogs.com/kailugaji/
public class Text {
public static void main(String[] args) throws MyException, IOException {
Login l=new Login();
l.login();
}
}
class Student{
private String stunumber;
private String name;
private String age;
private String sex;
private String score;
public void set_stunumber(String stu){
stunumber=stu;
}
public String get_stunumber(){
return stunumber;
}
void set_name(String na){
name=na;
}
String get_name(){
return name;
}
void set_age(String agee){
age=agee;
}
String get_age(){
return age;
}
void set_sex(String sexx){
sex=sexx;
}
String get_sex(){
return sex;
}
void set_score(String scoree){
score=scoree;
}
String get_score(){
return score;
}
}
class StudentManager{
int n=0;
Student ss[]=new Student[50];
//遍历学生信息
void showStudent(){
for(int i=0;i<=n;i++){
System.out.println("学号："+ss[i].get_stunumber()+"姓名："+ss[i].get_name()+"年龄："+ss[i].get_age()+"性别："+ss[i].get_sex()+"分数："+ss[i].get_score()+"\t\n");
}
}
//判断学号是否已经存在
boolean panduan(String st)
{
boolean flag=true;
for(int i=0;i<n;i++)
{
if(ss[i].get_stunumber().equals(st))
flag= false;
else
flag= true;
}
return flag;
}
//添加学生信息
void addStudent(String stunumber,String name,String age,String b,String score){
ss[n]=new Student();
ss[n].set_stunumber(stunumber);
ss[n].set_name(name);
ss[n].set_age(age);
ss[n].set_sex(b);
ss[n].set_score(score);
n++;
}
//删除学生信息
void deleteStudent(String stunumber) throws MyException{
for(int i=0;i<=n;i++){
if(ss[i].get_stunumber().equals(stunumber)){
System.out.println("学号为："+stunumber+"的学生已被删除！");
if(n==1){
System.out.println("数组为空");
ss[0]=new Student();
}
else {
for(int j=i;j<=n;j++){
ss[j]=ss[j+1];
}
n--;
}
}
else{
throw new MyException("该学生不存在！");
}
}
}
//修改学生信息
void updateStudent(String stu1,String name,String age,String sex,String score) throws MyException{
for(int i=0;i<=n;i++){
if(ss[i].get_stunumber().equals(stu1)){
ss[i]=new Student();
ss[i].set_stunumber(stu1);
ss[i].set_name(name);
ss[i].set_age(age);
ss[i].set_sex(sex);
ss[i].set_score(score);
}
else
throw new MyException("没有找到该学生！");
}
}
//查询学生信息
void selectStudent(String number) throws MyException{
for(int i=0;i<=n;i++){
if(ss[i].get_stunumber().equals(number)){
System.out.println("学号："+ss[i].get_stunumber()+"姓名："+ss[i].get_name()+"年龄："+ss[i].get_age()+"性别："+ss[i].get_sex()+"分数："+ss[i].get_score()+"\t\n");
}
else
throw new MyException("没有找到该学生！");
}
}
//统计不及格的人数
void tongji(){
int s=0;
for(int i=0;i<=n;i++){
int a=Integer.parseInt(ss[i].get_score());
if(a<=60){
s=s+1;
System.out.println("学号："+ss[i].get_stunumber()+"姓名："+ss[i].get_name()+"年龄："+ss[i].get_age()+"性别："+ss[i].get_sex()+"分数："+ss[i].get_score()+"\t\n");
}
}
System.out.println("不及格的人数为："+s+"人");
}
//输入界面
void showface(){
System.out.println("*****************************");
System.out.println("石家庄铁道大学学生信息管理系统");
System.out.println("*****************************");
System.out.println("1.遍历输出学生信息");
System.out.println("2.新学生信息录入");
System.out.println("3.删除学生信息");
System.out.println("4.修改学生信息");
System.out.println("5.查询学生信息");
System.out.println("6.学生信息统计");
System.out.println("7退出.");
}
}
class Login{
User users=new User("001","123456");//用户名，密码
//登录
void login() throws MyException, IOException{
BufferedReader in=new BufferedReader(new InputStreamReader(System.in));
DataOutputStream out=new DataOutputStream(new BufferedOutputStream(new FileOutputStream("Student.txt",true)));
for(int i=1;i<=3;i++){
System.out.println("请输入用户ID：");
String id=in.readLine();
System.out.println("请输入密码：");
String pass=in.readLine();
if((users.uername.equals(id))&&(users.passage.equals(pass))){
StudentManager sm=new StudentManager();
while(true){
sm.showface();
System.out.println("请选择：");
String choose=in.readLine();
if(choose.startsWith("1")){
sm.showStudent();
}
else if(choose.startsWith("2")){
System.out.print("请输入学号：");
String stu=in.readLine();
System.out.print("请输入姓名：");
String name=in.readLine();
System.out.print("请输入年龄：");
String age=in.readLine();
System.out.println("请输入性别（true男，false女）：");
String sex=in.readLine();
System.out.print("请输入分数：");
String score=in.readLine();
if(sm.panduan(stu)){
sm.addStudent(stu, name, age, sex, score);
System.out.println("创建成功！");
out.writeUTF("|学号："+stu+"|姓名："+name+"|年龄："+age+"|性别："+sex+"|分数："+score+"|\t\t\n\n");
}
else
throw new MyException("该学生已存在，请勿重复添加");
}
else if(choose.startsWith("3")){
System.out.println("请输入学号：");
String stu=in.readLine();
if(!(sm.panduan(stu))){
sm.deleteStudent(stu);
}
else
throw new MyException("该学号不存在！");
}
else if(choose.startsWith("4")){
System.out.println("请输入学号：");
String stu=in.readLine();
System.out.println("请输入姓名：");
String name=in.readLine();
System.out.println("请输入年龄：");
String age=in.readLine();
System.out.print("请输入性别（true男，false女）：");
String sex=in.readLine();
System.out.print("请输入分数：");
String score=in.readLine();
if(!(sm.panduan(stu))){
sm.updateStudent(stu, name, age, sex, score);
out.writeUTF("|学号："+stu+"|姓名："+name+"|年龄："+age+"|性别："+sex+"|分数："+score+"|\t\n");
}
else
throw new MyException("该学号不存在！");
}
else if(choose.startsWith("5")){
System.out.println("请输入学号：");
String stu=in.readLine();
if(!(sm.panduan(stu))){
sm.selectStudent(stu);
}
else
throw new MyException("该学号不存在！");
}
else if(choose.startsWith("6")){
sm.tongji();
}
else if(choose.startsWith("7")){
in.close();
out.close();
System.exit(0);
}
else {
throw new MyException("选择错误，请重新选择");
}
}
}
else
System.out.println("用户ID或密码错误，请重新输入");
}
throw new MyException("该卡已锁定！");
}
}
class User{
String uername;
String passage;
User(String user,String pass){
this.uername=user;
this.passage=pass;
}
void set_uername(String use){
uername=use;
}
String get_uername(){
return uername;
}
void set_passage(String pass){
passage=pass;
}
String get_passage(){
return passage;
}
}
class MyException extends Exception{
public MyException(String e) {
super(e);
}
}
