Kod kelas pelajar
Student.java
package dormitory;
public class Student {
private String id;
private String name;
private String sex;
private String dormid;
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 getSex() {
return sex;
}
public void setSex(String sex) {
this.sex = sex;
}
public String getDormid() {
return dormid;
}
public void setDormid(String dormid) {
this.dormid = dormid;
}
}Kod operasi utama
IntailStudent.java
package dormitory;
import java.awt.List;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.Scanner;
import javax.print.DocFlavor.INPUT_STREAM;
import javax.swing.event.ListSelectionEvent;
import org.omg.PortableInterceptor.IORInterceptor;
public class InitailStudent {
private static int n=0;
private static Student[] stu=new Student[100];
//主函数
public static void main(String[] args) throws IOException {
boolean a=false;
boolean b=false;
InitailStudent student=new InitailStudent();
student.judge(a, b);
}
//登入函数
private void judge(boolean a, boolean b) throws IOException
{
do {
System.out.println("欢迎进入登入页面！");
Scanner input=new Scanner(System.in);
System.out.println("请输入账号：");
String account=input.nextLine();
System.out.println("请输入密码：");
String code=input.nextLine();
a=account.equals("admin");
b=code.equals("admin");
} while(!(a==true&&b==true));
Menu();
}
//系统菜单页面
private void Menu() throws IOException{
Scanner input=new Scanner(System.in);
System.out.println("------ 欢迎进入宿舍管理系统 ------");
System.out.println("------ 请选择下列操作 ------");
System.out.println("--- 1.显示所有学生信息 ---"); //Show()
System.out.println("--- 2.查询学生信息 ---"); //Find()
System.out.println("--- 3.增加学生信息 ---"); //Add()
System.out.println("--- 4.修改学生信息 ---"); //Renew()
System.out.println("--- 5.删除学生信息 ---"); //Delete()
System.out.println("--- 0.退出系统 ---");
System.out.println("请输入1~5:");
int a=input.nextInt();
while(a<0||a>5)
{
System.out.println("输入有误，请重新输入：");
a=input.nextInt();
}
switch (a) {
case 1:
Show();
break;
case 2:
Find();
break;
case 3:
Add();
break;
case 4:
Renew();
break;
case 5:
Delete();
break;
case 0:
System.out.println("成功退出系统！");
System.exit(0);
break;
}
}
//显示学生的全部信息
private void Show() throws IOException{
System.out.println("您总录入的信息如下：");
System.out.println("*****************************");
BufferedReader br=new BufferedReader(new FileReader("student.txt"));
String line;
while((line=br.readLine())!=null){
System.out.println(line);
}
br.close();
System.out.println("\n\r");
System.out.println("此次录入的信息为");
System.out.println("*****************************");
int i;
for(i=0;i<n;i++)
{
System.out.println("学号："+stu[i].getId()+"\t姓名："+stu[i].getName()+"\t性别："+stu[i].getSex()+"\t宿舍号："+stu[i].getDormid());
}
System.out.println("返回主菜单");
Menu();
}
//查询学生信息
private void Find() throws IOException{
ArrayList<ArrayList<String>> lists = new ArrayList<>();
BufferedReader br=new BufferedReader(new FileReader("student.txt"));
String line;
ArrayList<String> list = new ArrayList<>();
ArrayList<String> validlist = new ArrayList<>();
while((line=br.readLine())!=null){
list.add(line.toString());
}
br.close();
for(int i = 0;i<list.size();i++)
if(i!=0&&list.get(i-1).startsWith("学号")){
validlist.add(list.get(i));
}
for (String string : validlist) {
String[] split = string.split(" ");
ArrayList<String> tempString = new ArrayList<>();
for (String string2 : split) {
tempString.add(string2);
}
lists.add(tempString);
}
System.out.println("共有"+lists.size()+"个学生信息");
String[][] stu1=new String[lists.size()][4];
for(int i=0;i<lists.size();i++)
for(int j=0;j<4;j++){
stu1[i][j]=lists.get(i).get(j);
}
System.out.println("请输入学生的学号：");
Scanner input=new Scanner(System.in);
String d=input.next();
for(int i=0;i<stu1.length;i++)
{
if(d.equals(stu1[i][0]))
{
System.out.println("查询成功，以下为该学生的信息");
System.out.println("学号："+stu1[i][0]+"\t姓名："+stu1[i][1]+"\t性别："+stu1[i][2]+"\t宿舍号："+stu1[i][3]);
System.out.println("是否继续查询，否返回菜单，是Y否N");
String cho=input.next();
char ch=cho.charAt(0);
while(ch!='Y'&&ch!='y'&&ch!='N'&&ch!='n')
{
System.out.println("输入有误！请重新输入：");
cho=input.next();
ch=cho.charAt(0);
}
while(ch=='Y'||ch=='y'){
Find();
}
while(ch=='N'||ch=='n'){
Menu();
}
}
}
System.out.println("没有找到该学生，是继续输入，否返回菜单，是Y否N");
String cho=input.next();
char ch=cho.charAt(0);
while(ch!='Y'&&ch!='y'&&ch!='N'&&ch!='n')
{
System.out.println("输入有误！请重新输入：");
cho=input.next();
ch=cho.charAt(0);
}
while(ch=='Y'||ch=='y'){
Find();
}
while(ch=='N'||ch=='n'){
Menu();
}
}
//增加一个学生
private void Add() throws IOException{
String id;
String dormid;
String name;
String sex;
String cho;
char ch;
stu[n]=new Student();
Scanner input=new Scanner(System.in);
if(n==0)
{
System.out.println("您此次还没有录入任何信息，是否录入，是Y否N");
cho=input.next();
ch=cho.charAt(0);
while(ch!='Y'&&ch!='y'&&ch!='N'&&ch!='n')
{
System.out.println("输入有误！请重新输入：");
cho=input.next();
ch=cho.charAt(0);
}
while(ch=='Y'||ch=='y'){
break;
}
while(ch=='N'||ch=='n'){
Menu();
}
}
FileWriter fw=new FileWriter("student.txt",true);
fw.write("\r\n");
fw.write("学号 姓名 性别 宿舍号 \r\n");
System.out.println("请输入学生的学号：");
id=input.next();
stu[n].setId(id);
fw.write(stu[n].getId()+" ");
System.out.println("请输入学生的姓名：");
name=input.next();
stu[n].setName(name);
fw.write(stu[n].getName()+" ");
System.out.println("请输入学生的性别：");
sex=input.next();
stu[n].setSex(sex);
fw.write(stu[n].getSex()+" ");
System.out.println("请输入学生的宿舍号：");
dormid=input.next();
stu[n].setDormid(dormid);
fw.write(stu[n].getDormid()+" ");
n++;
fw.close();
System.out.println("是否继续添加学生？否返回主菜单，是Y否N");
cho=input.next();
ch=cho.charAt(0);
while(ch!='Y'&&ch!='y'&&ch!='N'&&ch!='n')
{
System.out.println("输入有误！请重新输入：");
cho=input.next();
ch=cho.charAt(0);
}
while(ch=='Y'||ch=='y'){
Add();
}
while(ch=='N'||ch=='n'){
Menu();
}
}
//修改学生信息
private void Renew() throws IOException{
ArrayList<ArrayList<String>> lists = new ArrayList<>();
BufferedReader br=new BufferedReader(new FileReader("student.txt"));
String line;
ArrayList<String> list = new ArrayList<>();
ArrayList<String> validlist = new ArrayList<>();
while((line=br.readLine())!=null){
list.add(line.toString());
}
br.close();
for(int i = 0;i<list.size();i++)
if(i!=0&&list.get(i-1).startsWith("学号")){
validlist.add(list.get(i));
}
for (String string : validlist) {
String[] split = string.split(" ");
ArrayList<String> tempString = new ArrayList<>();
for (String string2 : split) {
tempString.add(string2);
}
lists.add(tempString);
}
String[][] stu1=new String[lists.size()][4];
for(int i=0;i<lists.size();i++)
for(int j=0;j<4;j++){
stu1[i][j]=lists.get(i).get(j);
}
int temp=0;
boolean flag=false;
System.out.println("请输入要修改学生的学号:");
Scanner input=new Scanner(System.in);
String d=input.next();
for(int i=0;i<stu1.length;i++)
{
while(d.equals(stu1[i][0]))
{
temp=i;
flag=true;
break;
}
}
if(!flag)
{
System.out.println("输入的学号有误,未找到该学生，是否再次进入修改,是Y,否N");
String cho1=input.next();
char ch2=cho1.charAt(0);
while (ch2!='N'&&ch2!='n'&&ch2!='Y'&&ch2!='y')
{
System.out.println("输入无效，请重新输入：");
cho1=input.next();
ch2=cho1.charAt(0);
}
if (ch2=='y'||ch2=='Y'){
Renew();
}
if (ch2=='N'||ch2=='n'){
System.out.println("返回主菜单");
Menu();
}
}
else
{
System.out.println("您要修改的学生的信息如下：");
System.out.println("学号："+stu1[temp][0]+"\t姓名："+stu1[temp][1]+"\t性别："+stu1[temp][2]+"\t宿舍号："+stu1[temp][3]);
System.out.println("请以下选择要修改的内容：");
System.out.println("------ 1.姓名 ------");
System.out.println("------ 2.性别 ------");
System.out.println("------ 3.宿舍号 ------");
Scanner input1=new Scanner(System.in);
int a=input1.nextInt();
if(a==1)
{
System.out.println("请输入新的姓名：");
String name=input1.next();
stu1[temp][1]=name;
FileWriter fw1=new FileWriter("student.txt");
fw1.write(" ");
fw1.close();
FileWriter fw=new FileWriter("student.txt",true);
fw.write("\r\n"+" "+"学生信息表\r\n");
for(int i=0;i<stu1.length;i++)
{
fw.write("\r\n学号 姓名 性别 宿舍号 \r\n");
fw.write(stu1[i][0]+" ");
fw.write(stu1[i][1]+" ");
fw.write(stu1[i][2]+" ");
fw.write(stu1[i][3]+" ");
}
fw.close();
System.out.println("修改成功！");
System.out.println("还要继续修改吗?是继续修改，否返回主菜单，是Y否N");
String cho1=input1.next();
char ch2=cho1.charAt(0);
while (ch2!='N'&&ch2!='n'&&ch2!='Y'&&ch2!='y')
{
System.out.println("输入无效，请重新输入：");
cho1=input.next();
ch2=cho1.charAt(0);
}
if (ch2=='y'||ch2=='Y'){
Renew();
}
if (ch2=='N'||ch2=='n'){
System.out.println("返回主菜单");
Menu();
}
}
else if(a==2)
{
System.out.println("请输入新的性别：");
String sex=input1.next();
stu1[temp][2]=sex;
FileWriter fw1=new FileWriter("student.txt");
fw1.write(" ");
fw1.close();
FileWriter fw=new FileWriter("student.txt",true);
fw.write("\r\n"+" "+"学生信息表\r\n");
for(int i=0;i<stu1.length;i++)
{
fw.write("\r\n学号 姓名 性别 宿舍号 \r\n");
fw.write(stu1[i][0]+" ");
fw.write(stu1[i][1]+" ");
fw.write(stu1[i][2]+" ");
fw.write(stu1[i][3]+" ");
}
fw.close();
System.out.println("修改成功！");
System.out.println("还要继续修改吗?是继续修改，否返回主菜单，是Y否N");
String cho1=input1.next();
char ch2=cho1.charAt(0);
while (ch2!='N'&&ch2!='n'&&ch2!='Y'&&ch2!='y')
{
System.out.println("输入无效，请重新输入：");
cho1=input.next();
ch2=cho1.charAt(0);
}
if (ch2=='y'||ch2=='Y'){
Renew();
}
if (ch2=='N'||ch2=='n'){
System.out.println("返回主菜单");
Menu();
}
}
else if(a==3)
{
System.out.println("请输入新的宿舍号：");
String dormid=input1.next();
stu1[temp][3]=dormid;
FileWriter fw1=new FileWriter("student.txt");
fw1.write(" ");
fw1.close();
FileWriter fw=new FileWriter("student.txt",true);
fw.write("\r\n"+" "+"学生信息表\r\n");
for(int i=0;i<stu1.length;i++)
{
fw.write("\r\n学号 姓名 性别 宿舍号 \r\n");
fw.write(stu1[i][0]+" ");
fw.write(stu1[i][1]+" ");
fw.write(stu1[i][2]+" ");
fw.write(stu1[i][3]+" ");
}
fw.close();
System.out.println("修改成功！");
System.out.println("还要继续修改吗?是继续修改，否返回主菜单，是Y否N");
String cho1=input1.next();
char ch2=cho1.charAt(0);
while (ch2!='N'&&ch2!='n'&&ch2!='Y'&&ch2!='y')
{
System.out.println("输入无效，请重新输入：");
cho1=input.next();
ch2=cho1.charAt(0);
}
if (ch2=='y'||ch2=='Y'){
Renew();
}
if (ch2=='N'||ch2=='n'){
System.out.println("返回主菜单");
Menu();
}
}
else {
System.out.println("输入有误，请重新输入：");
Renew();
}
}
}
//删除学生信息
private void Delete() throws IOException{
ArrayList<ArrayList<String>> lists = new ArrayList<>();
BufferedReader br=new BufferedReader(new FileReader("student.txt"));
String line;
ArrayList<String> list = new ArrayList<>();
ArrayList<String> validlist = new ArrayList<>();
while((line=br.readLine())!=null){
list.add(line.toString());
}
br.close();
for(int i = 0;i<list.size();i++)
if(i!=0&&list.get(i-1).startsWith("学号")){
validlist.add(list.get(i));
}
for (String string : validlist) {
String[] split = string.split(" ");
ArrayList<String> tempString = new ArrayList<>();
for (String string2 : split) {
tempString.add(string2);
}
lists.add(tempString);
}
String[][] stu1=new String[lists.size()][4];
for(int i=0;i<lists.size();i++)
for(int j=0;j<4;j++){
stu1[i][j]=lists.get(i).get(j);
}
int temp=0;
boolean flag=true;
System.out.println("请输入你想要删除该学生的学号：");
Scanner input2=new Scanner(System.in);
String d=input2.next();
for(int i=0;i<stu1.length;i++)
{
while(d.equals(stu1[i][0]))
{
temp=i;
flag=true;
break;
}
}
if(!flag)
{
System.out.println("输入的学号有误,未找到该学生，再次进入删除，请重新输入：");
String cho1=input2.next();
char ch2=cho1.charAt(0);
while (ch2!='N'&&ch2!='n'&&ch2!='Y'&&ch2!='y')
{
System.out.println("输入无效，请重新输入：");
cho1=input2.next();
ch2=cho1.charAt(0);
}
if (ch2=='y'||ch2=='Y'){
Delete();
}
if (ch2=='N'||ch2=='n'){
System.out.println("返回主菜单");
Menu();
}
}
else{
System.out.println("您要删除的学生的信息如下：");
System.out.println("学号："+stu1[temp][0]+"\t姓名："+stu1[temp][1]+"\t性别："+stu1[temp][2]+"\t宿舍号："+stu1[temp][3]);
for (int i=temp;i<stu1.length-1;i++)
{
stu1[i]=stu1[i+1];
}
FileWriter fw1=new FileWriter("student.txt");
fw1.write(" ");
fw1.close();
FileWriter fw=new FileWriter("student.txt",true);
fw.write("\r\n"+" "+"学生信息表\r\n");
for(int i=0;i<stu1.length-1;i++)
{
fw.write("\r\n学号 姓名 性别 宿舍号 \r\n");
fw.write(stu1[i][0]+" ");
fw.write(stu1[i][1]+" ");
fw.write(stu1[i][2]+" ");
fw.write(stu1[i][3]+" ");
}
fw.close();
System.out.println("删除该学生信息成功！");
System.out.println("---------------------");
}
System.out.println("还要继续删除吗?是继续删除，否返回主菜单，是Y否N");
String cho2=input2.next();
char ch3=cho2.charAt(0);
while (ch3!='N'&&ch3!='n'&&ch3!='Y'&&ch3!='y')
{
System.out.println("输入无效，请重新输入：");
cho2=input2.next();
ch3=cho2.charAt(0);
}
if (ch3=='y'||ch3=='Y'){
Delete();
}
if (ch3=='N'||ch3=='n'){
System.out.println("返回主菜单");
Menu();
}
}
}Atas ialah kandungan terperinci Bagaimana untuk melaksanakan sistem asrama pelajar di java. Untuk maklumat lanjut, sila ikut artikel berkaitan lain di laman web China PHP!
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