Java学生选课系统程序设计

ID:992276 · 发表于 2021-12-14 16:42

较简单的学生选课系统，之前做Java设计时写的，代码量大概一千二百行左右，有需要的可以自取

package user;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Scanner;
import course.Course;
import inputErr.UsrInput;
public class User {
public String name; //用户名
public String pwd; //密码
public User() {}
/**
* 显示用户信息
*/
public void showInfo() {
System.out.println(name+":"+pwd);
}
/**
* 设置用户密码
*/
public void changePwd() {
System.out.print("输入原密码:");
String originalPwd = UsrInput.getString();
if (originalPwd.equals(this.pwd))
while(true) {
System.out.print("输入新密码:");
String pwd = UsrInput.getString();
System.out.print("确认密码:");
String pwd2 = UsrInput.getString();
if (pwd.length()>=6 && pwd.length()<=12 && pwd.equals(pwd2)) {
this.pwd = pwd;
System.out.println("密码修改成功...");
break;
} else {
continue;
}
}
else {
System.out.println("原密码不正确...");
}
}
public User login() {
// get admin pwd for .txt file
User.getAdminInfo();
System.out.print("输入管理员密码:");
String pwd = UsrInput.getString();
if (pwd.equals(AdminUsers.admin.pwd)) {
System.out.println(AdminUsers.admin.name + ", 欢迎您!");
return AdminUsers.admin; //成功
} else {
System.out.println("登录失败，密码错误...");
return null; //失败
}
}
public static void getAdminInfo() {
File f = new File("admin pwd.txt");
try {
if (!f.exists())
f.createNewFile();
BufferedReader br = new BufferedReader(new InputStreamReader(new FileInputStream(f.getAbsoluteFile())));
String info = null;
if ((info=br.readLine())==null) {
AdminUsers.admin.name = "admin"; //管理员初始名称
AdminUsers.admin.pwd = "123456"; //管理员初始密码123456
} else {
String info_[] = info.split(" ");
AdminUsers.admin.name = info_[0];
AdminUsers.admin.pwd = info_[1];
}
br.close();
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
public static void saveAdminInfo() {
try {
BufferedWriter out = new BufferedWriter(new FileWriter("admin pwd.txt"));
out.write(AdminUsers.admin.name + " " + AdminUsers.admin.pwd); // write password
out.flush();
out.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public void adminMenu() {
int choice=0, innerChoice=0;
while (true) {
System.out.println("1.管理课程\n2.管理师傅\n3.管理学生\n4.修改管理员密码\n5.修改管理员名称\n0.退出");
choice = UsrInput.getInt();
switch(choice) {
case 1:
do {
innerChoice=User.adminCourseMenu();
if (innerChoice!=0)
User.funcDistribute(innerChoice);
} while (innerChoice!=0);
break;
case 2:
do {
innerChoice=User.adminTchMenu();
if (innerChoice!=0)
User.funcDistribute(innerChoice);
} while (innerChoice!=0);
break;
case 3:
do {
innerChoice=User.adminStuMenu();
if (innerChoice!=0)
User.funcDistribute(innerChoice);
} while (innerChoice!=0);
break;
case 4:
AdminUsers.admin.changePwd();
break;
case 5:
User.changeAdminName();
break;
case 0:
Course.saveTofile(); //保存所有课程信息
User.saveStuInfo();
User.saveTchInfo();
return;
default: break;
}
}
}
public static void changeAdminName() {
System.out.print("输入新的管理员名称:");
String newAdminName = UsrInput.getString();
AdminUsers.admin.name = newAdminName;
System.out.println("名称修改成功...");
}
public static void funcDistribute(int funcId) {
switch (funcId) {
case 1: Course.addCourses(); break;
case 2: Course.deleteCourses(); break;
case 3: Course.setCourseTeacher(); break;
case 4: Course.showAllCourses(); break;
case 5: Course.sortCourses(); break;
case 6: User.addTeachers(); break;
case 7: User.deleteTeachers(); break;
case 8: Course.searchCourseByTeacher(); break;
case 9: AdminUsers.showAllTcher(); break;
case 10: User.resetPwd(1); break;
case 11: User.addStudents(); break;
case 12: User.deleteStudents(); break;
case 13: AdminUsers.showAllStudent(); break;
case 14: User.resetPwd(0); break;
default:
}
}
public static int adminCourseMenu() {
System.out.println("选择功能:\n1.添加课程\n2.删除课程\n"
+ "3.设置课程师傅\n4.显示课程列表\n5.按选课人数排序\n"
+ "0.退出");
while (true) {
int choice = UsrInput.getInt();
if (choice==0) return 0;
else if (choice>=1 && choice<=5)
return choice;
}
}
public static int adminTchMenu() {
System.out.println("选择功能:\n1.添加师傅\n2.删除师傅\n"
+ "3.查看师傅所授课程\n4.显示师傅列表\n"
+ "5.师傅密码恢复\n0.退出");
while (true) {
int choice = UsrInput.getInt();
if (choice==0) return 0;
else if (choice>=1 && choice<=5)
return choice+5;
}
}
public static int adminStuMenu() {
System.out.println("选择功能:\n1.添加学生\n2.删除学生\n"
+ "3.查看学生列表\n"
+ "4.学生密码恢复\n0.退出");
while (true) {
int choice = UsrInput.getInt();
if (choice==0) return 0;
else if (choice>=1 && choice<=4)
return choice+10;
}
}
public static void addTeacher() {
System.out.print("姓名:");
String name = UsrInput.getString();
System.out.print("工号:");
int workId = UsrInput.getInt();
System.out.print("职位:");
String occupation = UsrInput.getString();
AdminUsers.t.add(new Teacher(name, "123456", workId, occupation));
}
public static void addTeachers() {
while(true) {
User.addTeacher();
System.out.print("师傅信息添加成功，是否继续添加？(y/n)");
if (UsrInput.getString().equals("y"))
continue;
else
break;
}
}
public static boolean deleteTeacher() {
System.out.print("输入要删除的师傅信息工号:");
int objTeacher = UsrInput.getInt();
Teacher tmp = null;
for (int i=0; i<AdminUsers.t.size(); ++i)
if ((tmp=AdminUsers.t.get(i)).getWorkId()==objTeacher) {
AdminUsers.t.remove(i); //删除师傅信息
//首先级联置空其教授的课程
for (Course c : Course.courseSet)
if (c.teacher.equals(tmp.name))
c.teacher = "---";
return true;
}
return false;
}
public static void deleteTeachers() {
if (AdminUsers.t==null || AdminUsers.t.size()==0) {
System.out.println("暂无师傅信息...");
return; //空
}
while(true) {
if (User.deleteTeacher())
System.out.print("师傅信息删除成功，是否继续删除？(y/n)");
else
System.out.print("删除失败，无匹配师傅信息...\n输入y继续删除，输入n退出:");
if (UsrInput.getString().equals("y")) {
continue;
} else
break;
}
}
public static void addStudent() {
System.out.print("姓名:");
String name = UsrInput.getString();
System.out.print("学号:");
int stuId = UsrInput.getInt();
System.out.print("班级:");
String class_ = UsrInput.getString();
AdminUsers.s.add(new Student(name, "123456", stuId, class_));
}
public static void addStudents() {
while(true) {
User.addStudent();
System.out.print("学生信息添加成功,是否继续添加？(y/n)");
if (UsrInput.getString().equals("y"))
continue;
else
break;
}
}
public static boolean deleteStudent() {
System.out.print("输入要删除的学生信息学号:");
int objStu = UsrInput.getInt();
Student tmp = null;
for (int i=0; i<AdminUsers.s.size(); ++i)
if (objStu==(tmp=AdminUsers.s.get(i)).getStuId()) {
AdminUsers.s.remove(i);
//该学生选修的课程人数减一
for (Integer cid : Student.allStuCourses.get(tmp.getStuId()))
for (Course c : Course.courseSet)
if (c.id==cid.intValue())
--c.stuNum;
return true;
}
return false;
}
public static void deleteStudents() {
if (AdminUsers.s==null || AdminUsers.s.size()==0) {
System.out.println("暂无任何学生信息...");
return; //空
}
Scanner cin = new Scanner(System.in);
while(true) {
if (User.deleteStudent())
System.out.print("学生信息删除成功，是否继续？(y/n)");
else
System.out.print("删除失败，无匹配的学生信息...\n输入y继续删除，输入n退出:");
if (cin.next().equals("y")) {
continue;
} else
break;
}
}
public static void saveStuInfo() {
try {
BufferedWriter out = new BufferedWriter(new FileWriter("student info.txt"));
for (Student s : AdminUsers.s)
out.write(s.toString()+"\r\n");
out.flush();
out.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public static void readStuInfo() {
File f = new File("student info.txt");
try {
if (!f.exists()) f.createNewFile();
BufferedReader br = new BufferedReader(new InputStreamReader(new FileInputStream(f.getAbsoluteFile())));
String info = null;
while ((info = br.readLine()) != null) {
String[] info_ = info.split(" ");
int stuId = Integer.parseInt(info_[0]);
String name = info_[1];
String class_ = info_[2];
String pwd = info_[3];
AdminUsers.s.add(new Student(name, pwd, stuId, class_));
}
br.close();
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
public static void saveTchInfo() {
try {
BufferedWriter out = new BufferedWriter(new FileWriter("teacher info.txt"));
for (Teacher t : AdminUsers.t)
out.write(t.toString()+"\r\n");
out.flush();
out.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public static void readTchInfo() {
File f = new File("teacher info.txt");
try {
if (!f.exists()) f.createNewFile();
BufferedReader br = new BufferedReader(new InputStreamReader(new FileInputStream(f.getAbsoluteFile())));
String info = null;
while ((info = br.readLine()) != null) {
String[] info_ = info.split(" ");
int workId = Integer.parseInt(info_[0]);
String name = info_[1];
String occupation = info_[2];
String pwd = info_[3];
AdminUsers.t.add(new Teacher(name, pwd, workId, occupation));
}
br.close();
} catch (FileNotFoundException e) {
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Java学生选课系统程序设计

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