初学者未完善 后期完善 顺序：entity–>dao—>servce–>controller util包可以先写先测试，测试类看自身情况
entity包
User 类
代码语言：javascript复制package entity;
/**
* @Author: hyy
* @Date: 2020/12/18 13:11
*/
public class User {
private Integer id;
private String userName;
private String passWord;
private String question;
private String answer;
private Integer level;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
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;
}
public String getQuestion() {
return question;
}
public void setQuestion(String question) {
this.question = question;
}
public String getAnswer() {
return answer;
}
public void setAnswer(String answer) {
this.answer = answer;
}
public Integer getLevel() {
return level;
}
public void setLevel(Integer level) {
this.level = level;
}
/**
* 空参构造器
*/
public User() {
}
/**
* 用来用户注册
* @param id
*/
public User(Integer id) {
this.id = id;
}
/**
* 初始化除账号外的参数
* @param userName
* @param passWord
* @param question
* @param answer
* @param level
*/
public User(String userName, String passWord, String question, String answer, Integer level) {
this.userName = userName;
this.passWord = passWord;
this.question = question;
this.answer = answer;
this.level = level;
}
/**
* 初始化全部参数的构造器
* @param id
* @param userName
* @param passWord
* @param question
* @param answer
* @param level
*/
public User(Integer id, String userName, String passWord, String question, String answer, Integer level) {
this.id = id;
this.userName = userName;
this.passWord = passWord;
this.question = question;
this.answer = answer;
this.level = level;
}
@Override
public String toString() {
return "{"
"ID：" id
", 昵称：" userName
", 密码：" passWord
", 密保问题：" question
", 密保答案：" answer
", 用户权限：" level
"}n";
}
}Course 类
代码语言：javascript复制课程类
package entity;
/**
* @Author: hyy
* @Date: 2020/12/18 21:11
*/
public class Course {
/**
* 学生id
*/
private Integer id;
/**
* 课程名称
*/
private String courseName;
/**
* 课程编号
*/
private String courseId;
/**
* 上课教师
*/
private String courseTeacher;
/**
* 课程可选总人数
*/
private Integer number;
/**
* 空参构造器
*/
public Course() {
}
/**
* 初始化除id外所有参数的构造器
* @param courseName
* @param courseId
* @param courseTeacher
* @param number
*/
public Course(String courseName, String courseId, String courseTeacher, Integer number) {
this.courseName = courseName;
this.courseId = courseId;
this.courseTeacher = courseTeacher;
this.number = number;
}
/**
* 初始化所有参数的构造器
* @param id
* @param courseName
* @param courseId
* @param courseTeacher
* @param number
*/
public Course(Integer id, String courseName, String courseId, String courseTeacher, Integer number) {
this.id = id;
this.courseName = courseName;
this.courseId = courseId;
this.courseTeacher = courseTeacher;
this.number = number;
}
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getCourseName() {
return courseName;
}
public void setCourseName(String courseName) {
this.courseName = courseName;
}
public String getCourseId() {
return courseId;
}
public void setCourseId(String courseId) {
this.courseId = courseId;
}
public String getCourseTeacher() {
return courseTeacher;
}
public void setCourseTeacher(String courseTeacher) {
this.courseTeacher = courseTeacher;
}
public Integer getNumber() {
return number;
}
public void setNumber(Integer number) {
this.number = number;
}
@Override
public String toString() {
return "{"
"ID=" id
", 课程名称：：" courseName
", 课程编号：" courseId
", 任教老师：" courseTeacher
", 课程总可选人数：" number
"}n";
}
}Dao包
UserDao.java
代码语言：javascript复制接口
package dao;
import entity.User;
import java.util.List;
/**
* @Author: hyy
* @Date: 2020/12/18 13:34
*/
public interface UserDao {
/**
* 添加用户
* @param user
* @return
*/
boolean insertUser(User user);
/**
* 根据id 删除用户
* @param id
* @return
*/
boolean deleteUserById(Integer id);
/**
* 根据id 更改用户
* @param id
* @param user
* @return
*/
boolean updateUserById(Integer id,User user);
/**
* 根据id 查询用户
* @param id
* @return
*/
User selectUserById(Integer id);
/**
* 根据用户名 查询用户
* @param userName
* @return
*/
User selectUserByUserName(String userName);
/**
* 查询所有用户
* @return
*/
List<User> selectAllUser();
}UserDaoImpl.java
代码语言：javascript复制实现类
package dao.impl;
import dao.UserDao;
import entity.User;
import java.io.*;
import java.util.ArrayList;
import java.util.List;
/**
* @Author: hyy
* @Date: 2020/12/18 13:35
*/
public class UserDaoImpl implements UserDao {
/**
* 添加用户
* @param user
* @return boolean
*/
@Override
public boolean insertUser(User user) {
try{
BufferedWriter bufferedWriter=new BufferedWriter(new FileWriter("UniversityCourseSelectionSystem\User.txt",true));
bufferedWriter.write(user.getId() "," user.getUserName() "," user.getPassWord() "," user.getQuestion() "," user.getAnswer() "," user.getLevel());
bufferedWriter.newLine();
bufferedWriter.close();
return true;
}catch (IOException e){
System.out.println("io异常，添加失败！");
return false;
}
}
/**
* 根据id 删除用户
* @param id
* @return boolean
*/
@Override
public boolean deleteUserById(Integer id) {
try {
BufferedReader bufferedReader=new BufferedReader(new FileReader("UniversityCourseSelectionSystem\User.txt"));
List<User> userList=new ArrayList<>();
String string ;
while ((string=bufferedReader.readLine())!=null){
String[]dates= string.split(",");
User user=new User(Integer.parseInt(dates[0]),dates[1],dates[2],dates[3],dates[4],Integer.parseInt(dates[5]));
userList.add(user);
}
for (int i = 0; i < userList.size(); i ) {
User user=userList.get(i);
if ( (user.getId()).equals(id) ){
userList.remove(i);
}
}
BufferedWriter bufferedWriter=new BufferedWriter(new FileWriter("UniversityCourseSelectionSystem\User.txt"));
for (int i = 0; i < userList.size(); i ) {
User user=userList.get(i);
String returnString =String.format("%s,%s,%s,%s,%s,%s",user.getId(),user.getUserName(),user.getPassWord(),user.getQuestion(),user.getAnswer(),user.getLevel());
bufferedWriter.write(returnString);
bufferedWriter.newLine();
}
bufferedReader.close();
bufferedWriter.close();
return true;
}catch (IOException e){
System.out.println("IO异常，删除失败！");
return false;
}
}
/**
* 根据id 更改用户
* @param id
* @param user
* @return boolean
*/
@Override
public boolean updateUserById(Integer id,User user) {
try{
BufferedReader bufferedReader=new BufferedReader(new FileReader("UniversityCourseSelectionSystem\User.txt"));
List<User> userList=new ArrayList<>();
String string;
while ((string=bufferedReader.readLine())!=null){
String[] dates=string.split(",");
User user1=new User(Integer.parseInt(dates[0]),dates[1],dates[2],dates[3],dates[4],Integer.parseInt(dates[5]));
userList.add(user1);
}
for (int i = 0; i < userList.size(); i ) {
User user1= userList.get(i);
if (user1.getId().equals(id)){
userList.set(i,user);
}
}
BufferedWriter bufferedWriter=new BufferedWriter(new FileWriter("UniversityCourseSelectionSystem\User.txt"));
for (int i = 0; i < userList.size(); i ) {
User user1=userList.get(i);
String returnString=String.format("%s,%s,%s,%s,%s,%s",user1.getId(),user1.getUserName(),user1.getPassWord(),user1.getQuestion(),user1.getAnswer(),user1.getLevel());
bufferedWriter.write(returnString);
bufferedWriter.newLine();
}
bufferedReader.close();
bufferedWriter.close();
return true;
}catch (IOException e){
System.out.println("io异常，更改用户信息失败！");
return false;
}
}
/**
* 根据id 查询用户
* @param id
* @return User
*/
@Override
public User selectUserById(Integer id) {
try {
BufferedReader bufferedReader=new BufferedReader(new FileReader("UniversityCourseSelectionSystem\User.txt"));
List<User> userList=new ArrayList<>();
String string;
while ((string=bufferedReader.readLine())!=null){
String [] dates=string.split(",");
User user=new User(Integer.parseInt(dates[0]),dates[1],dates[2],dates[3],dates[4],Integer.parseInt(dates[5]));
userList.add(user);
}
for (int i = 0; i < userList.size(); i ) {
User user=userList.get(i);
if (user.getId().equals(id)){
return user;
}
}
bufferedReader.close();
}catch (IOException e){
System.out.println("IO异常，查询失败！");
return null;
}
return null;
}
/**
* 根据userName 查询用户
* @param userName
* @return User
*/
@Override
public User selectUserByUserName(String userName) {
try{
BufferedReader bufferedReader=new BufferedReader(new FileReader("UniversityCourseSelectionSystem\User.txt"));
List<User> userList=new ArrayList<>();
String string;
while ((string=bufferedReader.readLine())!=null){
String[] dates=string.split(",");
User user=new User(Integer.parseInt(dates[0]),dates[1],dates[2],dates[3],dates[4],Integer.parseInt(dates[5]));
userList.add(user);
}
for (int i = 0; i < userList.size(); i ) {
User user=userList.get(i);
if (user.getUserName().equals(userName)){
return user;
}
}
bufferedReader.close();
}catch (IOException e) {
System.out.println("io异常，查询用户信息失败！");
}
return null;
}
/**
* 查询所有用户
* @return List<User>
*/
@Override
public List<User> selectAllUser() {
try {
BufferedReader bufferedReader=new BufferedReader(new FileReader("UniversityCourseSelectionSystem\User.txt"));
List<User> userList=new ArrayList<>();
String string;
while ((string=bufferedReader.readLine())!=null){
String[]dates=string.split(",");
User user=new User(Integer.parseInt(dates[0]),dates[1],dates[2],dates[3],dates[4],Integer.parseInt(dates[5]));
userList.add(user);
}
bufferedReader.close();
return userList;
}catch (IOException e){
System.out.println("io异常，查询用户信息失败！");
}
return null;
}
}CourseDao.java
代码语言：javascript复制接口
package dao;
import entity.Course;
import java.util.List;
/**
* @Author: hyy
* @Date: 2020/12/18 21:22
*/
public interface CourseDao {
/**
* 增加课程
* @param course
* @return
*/
boolean insertCourse(Course course);
/**
* 根据id和课程编号 删除对应id里的课程
* @param id
* @param courseId
* @return
*/
boolean deleteCourseByCourseId(Integer id,String courseId);
/**
* 根据id和课程编号 更改对应id里的课程
* @param id
* @param courseId
* @param course
* @return
*/
boolean updateCourseById(Integer id,String courseId,Course course);
/**
* 根据id 查询该id所选的课程
* @param id
* @return
*/
List<Course> selectCourseById(Integer id);
/**
* 查询所有id 所选的课程
* @return
*/
List<Course> selectAllCourse();
}CourseDaoImpl.java
代码语言：javascript复制实现类
package dao.impl;
import dao.CourseDao;
import entity.Course;
import java.io.*;
import java.util.ArrayList;
import java.util.List;
/**
* @Author: hyy
* @Date: 2020/12/18 21:27
*/
public class CourseDaoImpl implements CourseDao {
// CourseDaoImpl courseDao=new CourseDaoImpl(); 这样调回栈溢出异常
/**
* 添加课程
* @param course
* @return boolean
*/
@Override
public boolean insertCourse(Course course) {
try {
BufferedWriter bufferedWriter=new BufferedWriter(new FileWriter("UniversityCourseSelectionSystem\Course.txt",true));
bufferedWriter.write(course.getId() "," course.getCourseName() "," course.getCourseId() "," course.getCourseTeacher() "," course.getNumber());
bufferedWriter.newLine();
bufferedWriter.close();
return true;
}catch (IOException e){
System.out.println("IO异常，添加失败！");
return false;
}
}
/**
* 根据用户id和课程编号 删除用户课程里的该课程
* @param id
* @param courseId
* @return boolean
*/
@Override
public boolean deleteCourseByCourseId(Integer id,String courseId) {
try {
// List<Course> courseList1=courseDao.selectCourseById(id);
BufferedReader bufferedReader=new BufferedReader(new FileReader("UniversityCourseSelectionSystem\Course.txt"));
List<Course> courseList=new ArrayList<>();
String string;
while ((string=bufferedReader.readLine())!=null){
String[] dates=string.split(",");
Course course=new Course(Integer.parseInt(dates[0]),dates[1],dates[2],dates[3],Integer.parseInt(dates[4]));
courseList.add(course);
}
for (int i = 0; i < courseList.size(); i ) {
Course course=courseList.get(i);
if (course.getId().equals(id)){
if (course.getCourseId().equals(courseId)){
courseList.remove(i);
}else {
System.out.println("该用户里不存在该课程,删除失败！");
}
}else{
System.out.println("查无此id 删除失败！");
}
}
BufferedWriter bufferedWriter=new BufferedWriter(new FileWriter("UniversityCourseSelectionSystem\Course.txt"));
for (int i = 0; i < courseList.size(); i ) {
Course course=courseList.get(i);
String returnString=String.format("%s,%s,%s,%s,%s,",course.getId(),course.getCourseName(),course.getCourseId(),course.getCourseTeacher(),course.getNumber());
bufferedWriter.write(returnString);
bufferedWriter.newLine();
}
// byfferedReader.close();
bufferedWriter.close();
return true;
}catch (IOException e){
System.out.println("IO异常，删除失败！");
return false;
}
}
/**
* 根据id和课程编号 将id对应用户里的该课程更改成course
* @param id
* @param courseId
* @param course
* @return boolean
*/
@Override
public boolean updateCourseById(Integer id,String courseId, Course course) {
try {
// List<Course> courseList=courseDao.selectCourseById(id);
BufferedReader bufferedReader=new BufferedReader(new FileReader("UniversityCourseSelectionSystem\Course.txt"));
List<Course> courseList=new ArrayList<>();
String string;
while ((string=bufferedReader.readLine())!=null){
String[] dates=string.split(",");
Course course1=new Course(Integer.parseInt(dates[0]),dates[1],dates[2],dates[3],Integer.parseInt(dates[4]));
courseList.add(course1);
}
for (int i = 0; i < courseList.size(); i ) {
Course course1=courseList.get(i);
if (course1.getId().equals(id)){
if (course1.getCourseId().equals(courseId)){
courseList.set(i,course);
}
}
}
BufferedWriter bufferedWriter=new BufferedWriter(new FileWriter("UniversityCourseSelectionSystem\Course.txt"));
for (int i = 0; i < courseList.size(); i ) {
Course course1=courseList.get(i);
String returnString=String.format("%s,%s,%s,%s,%s,",course1.getId(),course1.getCourseName(),course1.getCourseId(),course1.getCourseTeacher(),course1.getNumber());
bufferedWriter.write(returnString);
bufferedWriter.newLine();
}
// bufferedReader.close();
bufferedWriter.close();
return true;
}catch (IOException e){
System.out.println("IO异常，更改失败！");
return false;
}
}
/**
* 根据id 查询id对应用户所选的课程
* @param id
* @return List<Course>
*/
@Override
public List<Course> selectCourseById(Integer id) {
try {
BufferedReader bufferedReader = new BufferedReader(new FileReader("UniversityCourseSelectionSystem\Course.txt"));
List<Course> courseList = new ArrayList<>();
List<Course> courseList1=new ArrayList<>();
String string;
while ((string = bufferedReader.readLine()) != null) {
String[] dates = string.split(",");
Course course1 = new Course(Integer.parseInt(dates[0]), dates[1], dates[2], dates[3], Integer.parseInt(dates[4]));
courseList.add(course1);
}
for (int i = 0; i < courseList.size(); i ) {
Course course1 = courseList.get(i);
if (course1.getId().equals(id)) {
courseList1.add(course1);
}
}
bufferedReader.close();
return courseList1;
}catch (IOException e){
System.out.println("IO异常，查询失败！");
return null;
}
}
/**
* 查询所有用户选的课程
* @return List<Course>
*/
@Override
public List<Course> selectAllCourse() {
try {
BufferedReader bufferedReader = new BufferedReader(new FileReader("UniversityCourseSelectionSystem\Course.txt"));
List<Course> courseList = new ArrayList<>();
String string;
while ((string = bufferedReader.readLine()) != null) {
String[] dates = string.split(",");
Course course = new Course(Integer.parseInt(dates[0]), dates[1], dates[2], dates[3], Integer.parseInt(dates[4]));
courseList.add(course);
}
bufferedReader.close();
return courseList;
}catch (IOException e){
System.out.println("IO异常，查询失败！");
return null;
}
}
}Service包
UserService.java
代码语言：javascript复制接口
package setvice;
import entity.User;
import java.util.List;
/**
* @Author: hyy
* @Date: 2020/12/18 14:23
*/
public interface UserService {
/**
* 根据id和密码登录普通用户
* @param id
* @param passWord
* @return boolean
*/
boolean ordinaryUserLogin(Integer id,String passWord);
/**
* 根据id和密码登录管理员
* @param id
* @param passWord
* @return boolean
*/
boolean administratorLogin(Integer id,String passWord);
/**
* 注册用户
* 学生和教师的注册分离在UserView里
* @param user
* @return boolean
*/
boolean registerUser(User user);
/**
* 添加用户
* @param user
* @return boolean
*/
boolean insertUser(User user);
/**
* 根据id删除用户
* @param id
* @return boolean
*/
boolean deleteUserById(Integer id);
/**
* 根据id 更改用户信息
* @param id
* @param user
* @return boolean
*/
boolean updateUserById(Integer id,User user);
/**
* 根据id查询用户
* @param id
* @return User
*/
User selectUserById(Integer id);
/**
* 根据用户名查询用户
* @param userName
* @return User
*/
User selectUserByUserName(String userName);
/**、
* 查询所有用户
* @return List<User>
*/
List<User> selectAllUser();
}UserServiceImpl.java
代码语言：javascript复制实现类
package setvice.impl;
import dao.UserDao;
import dao.impl.UserDaoImpl;
import entity.User;
import setvice.UserService;
import java.util.List;
/**
* @Author: hyy
* @Date: 2020/12/18 14:23
*/
public class UserServiceImpl implements UserService {
UserDao UserDao=new UserDaoImpl();
/**
* 普通用户登录（老师和学生）
* @param id
* @param passWord
* @return boolean
*/
@Override
public boolean ordinaryUserLogin(Integer id, String passWord) {
User user=UserDao.selectUserById(id);
if (user!=null&&(user.getLevel()==1||user.getLevel()==2)&&user.getId().equals(id)&&user.getPassWord().equals(passWord)){
System.out.println("登录成功！");
return true;
}
else {
System.out.println("登录失败，id不存在或密码输入错误！");
return false;
}
}
/**
* 管理员登录
* @param id
* @param passWord
* @return boolean
*/
@Override
public boolean administratorLogin(Integer id, String passWord) {
User user=UserDao.selectUserById(id);
if (user!=null&&user.getLevel()==3&&user.getId().equals(id)&&user.getPassWord().equals(passWord)){
System.out.println("登录成功！");
return true;
}
else {
System.out.println("登录失败，id不存在或密码输入错误！");
return false;
}
}
/**
* 注册用户
* @param user
* @return boolean
*/
@Override
public boolean registerUser(User user) {
User user1=UserDao.selectUserById(user.getId());
if (user1==null){
UserDao.insertUser(user);
System.out.println("恭喜注册成功！");
return true;
} else{
System.out.println("用户已存在,注册失败！");
return false;
}
}
/**
* 添加用户
* @param user
* @return
*/
@Override
public boolean insertUser(User user) {
User user1=UserDao.selectUserById(user.getId());
if (user1==null){
UserDao.insertUser(user);
System.out.println("添加成功！");
return true;
}else {
System.out.println("用户已存在，添加失败！");
return false;
}
}
/**
* 根据id 删除用户
* @param id
* @return
*/
@Override
public boolean deleteUserById(Integer id) {
User user=UserDao.selectUserById(id);
if (user!=null){
UserDao.deleteUserById(id);
System.out.println("删除成功！");
return true;
}else {
System.out.println("用户不存在，删除失败！");
return false;
}
}
/**
* 根据id 更改用户
* @param id
* @param user
* @return
*/
@Override
public boolean updateUserById(Integer id,User user) {
User user1=UserDao.selectUserById(id);
if (user1!=null){
UserDao.updateUserById(id,user);
System.out.println("更改成功！");
return true;
}else {
System.out.println("用户不存在，更改失败！");
return false;
}
}
/**
* 根据id 查询用户
* @param id
* @return
*/
@Override
public User selectUserById(Integer id) {
User user=UserDao.selectUserById(id);
if (user!=null){
return user;
}else {
System.out.println("用户不存在");
return null;
}
}
/**
* 根据用户名查询用户
* @param userName
* @return
*/
@Override
public User selectUserByUserName(String userName) {
User user=UserDao.selectUserByUserName(userName);
if (user!=null){
return user;
}else {
System.out.println("用户不存在，查询失败！");
return null;
}
}
/**
* 查询所有用户
* @return
*/
@Override
public List<User> selectAllUser() {
List<User> userList=UserDao.selectAllUser();
if (userList!=null){
return userList;
}else{
System.out.println("无用户！");
return null;
}
}
}CourseService.java
代码语言：javascript复制接口
package setvice;
import entity.Course;
import java.util.List;
/**
* @Author: hyy
* @Date: 2020/12/18 22:06
*/
public interface CourseService {
/**
* 添加课程 即 选课
* @param course
* @return boolean
*/
boolean insertCourseService(Course course);
/**
* 根据id和课程编号 删除id对应用户里的该课程
* @param id
* @param courseId
* @return boolean
*/
boolean deleteCourseByCourseIdService(Integer id,String courseId);
/**
* 根据id和课程编号 更改id对应用户里的该课程
* @param id
* @param courseId
* @param course
* @return boolean
*/
boolean updateCourseByIdService(Integer id,String courseId,Course course);
/**
* 根据id 查询id对应用户所选全部课程
* @param id
* @return List<Course>
*/
List<Course> selectCourseByIdService(Integer id);
/**
* 查询所有用户对应的课程
* @return List<Course>
*/
List<Course> selectAllCourseService();
}CourseServiceImpl.java
代码语言：javascript复制实现类
package setvice.impl;
import dao.CourseDao;
import dao.impl.CourseDaoImpl;
import entity.Course;
import entity.User;
import setvice.CourseService;
import java.util.List;
/**
* @Author: hyy
* @Date: 2020/12/18 22:24
*/
public class CourseServiceImpl implements CourseService {
CourseDao courseDao=new CourseDaoImpl();
/**
* 添加课程 即 选课
* @param course
* @return boolean
*/
@Override
public boolean insertCourseService(Course course) {
courseDao.insertCourse(course);
System.out.println("添加成功！");
return true;
}
/**
* 根据id和课程编号 删除id对应用户里的该课程
* @param id
* @param courseId
* @return boolean
*/
@Override
public boolean deleteCourseByCourseIdService(Integer id,String courseId) {
List<Course> courseList=courseDao.selectCourseById(id);
if (courseList!=null){
courseDao.deleteCourseByCourseId(id,courseId);
System.out.println("删除成功！");
return true;
}else {
System.out.println("课程不存在，删除失败！");
return false;
}
}
/**
* 根据id和课程编号 更改id对应用户里的该课程
* @param id
* @param courseId
* @param course
* @return boolean
*/
@Override
public boolean updateCourseByIdService(Integer id,String courseId, Course course) {
List<Course> courseList=courseDao.selectCourseById(id);
// System.out.println(courseList);
if (courseList!=null){
for (int i = 0; i < courseList.size(); i ) {
Course course1=courseList.get(i);
// System.out.println(course1);
if (course1.getCourseId().equals(courseId)){
courseDao.updateCourseById(id,courseId,course);
System.out.println("更改成功！");
}
}
return true;
// courseDao.updateCourseById(id,courseId,course);
// System.out.println("更改成功！");
// return true;
}else {
System.out.println("课程不存在，更改失败！");
return false;
}
// return false;
}
/**
* 根据id 查询id对应用户所选全部课程
* @param id
* @return List<Course>
*/
@Override
public List<Course> selectCourseByIdService(Integer id) {
List<Course> courseList=courseDao.selectCourseById(id);
if (courseList!=null){
return courseList;
}else {
System.out.println("课程不存在");
return null;
}
}
/**
* 查询所有用户对应的课程
* @return List<Course>
*/
@Override
public List<Course> selectAllCourseService() {
List<Course> courseList=courseDao.selectAllCourse();
if (courseList!=null){
return courseList;
}else{
System.out.println("无用户！");
return null;
}
}
}Contoller包
UserController.java
代码语言：javascript复制package controller;
import entity.User;
import setvice.UserService;
import setvice.impl.UserServiceImpl;
import java.util.List;
/**
* @Author: hyy
* @Date: 2020/12/18 15:23
*/
public class UserController {
UserService userService=new UserServiceImpl();
/**
* 普通用户登录
* @param id
* @param passWord
* @return boolean
*/
public boolean ordinaryUserLogin(Integer id, String passWord){
return userService.ordinaryUserLogin(id,passWord);
}
/**
* 管理员登陆
* @param id
* @param passWord
* @return boolean
*/
public boolean administratorLogin(Integer id, String passWord){
return userService.administratorLogin(id,passWord);
}
/**
* 注册用户
* @param user
* @return boolean
*/
public boolean registerUser(User user){
return userService.registerUser(user);
}
/**
* 添加用户
* @param user
* @return boolean
*/
public boolean insertUser(User user){
return userService.insertUser(user);
}
/**
* 根据id
* @param id
* @return boolean
*/
public boolean deleteUserById(Integer id){
return userService.deleteUserById(id);
}
/**
* 根据id 更改用户
* @param id
* @param user
* @return boolean
*/
public boolean updateUserById(Integer id,User user){
return userService.updateUserById(id,user);
}
/**
* 根据id 查询用户
* @param id
* @return User
*/
public User selectUserById(Integer id){
return userService.selectUserById(id);
}
/**
* 根据用户名查询用户
* @param userName
* @return User
*/
public User selectUserByUserName(String userName){
return userService.selectUserByUserName(userName);
}
/**
* 查询所有用户
* @return List<User>
*/
public List<User> selectAllUser(){
return userService.selectAllUser();
}
}CourseController.java
代码语言：javascript复制package controller;
import entity.Course;
import setvice.CourseService;
import setvice.impl.CourseServiceImpl;
import java.util.List;
/**
* @Author: hyy
* @Date: 2020/12/18 22:32
*/
public class CourseController {
CourseService courseService=new CourseServiceImpl();
/**
* 添加课程 即 选课
* @param course
* @return boolean
*/
public boolean insertCourseController(Course course){
return courseService.insertCourseService(course);
}
/**
* 根据id和课程编号 删除id对应用户里的该课程
* @param id
* @param courseId
* @return boolean
*/
public boolean deleteCourseByCourseIdController(Integer id,String courseId){
return courseService.deleteCourseByCourseIdService(id,courseId);
}
/**
* 根据id和课程编号 更改id对应用户里的该课程
* @param id
* @param courseId
* @param course
* @return boolean
*/
public boolean updateCourseByIdService(Integer id,String courseId,Course course){
return courseService.updateCourseByIdService(id,courseId,course);
}
/**
* 根据id 查询id对应用户所选全部课程
* @param id
* @return List<Course>
*/
public List<Course> selectCourseByIdController(Integer id){
return courseService.selectCourseByIdService(id);
}
/**
* 查询所有用户对应的课程
* @return List<Course>
*/
public List<Course> selectAllCourseService(){
return courseService.selectAllCourseService();
}
}View包
UserView.java
代码语言：javascript复制package views;
import controller.UserController;
import entity.User;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.List;
/**
* @Author: hyy
* @Date: 2020/12/18 15:33
*/
public class UserView {
BufferedReader bufferedReader=new BufferedReader(new InputStreamReader(System.in));
protected UserController userController=new UserController();
/**
*
* @return
*/
public boolean ordinaryStudentLoginView(){
try {
System.out.println("欢迎进入学生登录界面");
System.out.println("请输入id");
String id=bufferedReader.readLine();
System.out.println("请输入密码：");
String password=bufferedReader.readLine();
return userController.ordinaryUserLogin(Integer.parseInt(id),password);
}catch (IOException e){
System.out.println("io异常,登录失败！");
return false;
}
}
/**
*
* @return
*/
public boolean ordinaryTeacherLoginView(){
try {
System.out.println("欢迎进入教师登录界面");
System.out.println("请输入id");
String id=bufferedReader.readLine();
System.out.println("请输入密码：");
String password=bufferedReader.readLine();
return userController.ordinaryUserLogin(Integer.parseInt(id),password);
}catch (IOException e){
System.out.println("io异常,登录失败！");
return false;
}
}
/**
*
* @return
*/
public boolean administratorLoginView(){
try {
System.out.println("欢迎进入管理员登录界面");
System.out.println("请输入id");
String id=bufferedReader.readLine();
System.out.println("请输入密码：");
String password=bufferedReader.readLine();
return userController.administratorLogin(Integer.parseInt(id),password);
}catch (IOException e){
System.out.println("io异常,登录失败！");
return false;
}
}
/**
* 学生注册页面
* （权限绑定为1）
* @return boolean
*/
public boolean registerStudentView(){
try {
System.out.println("欢迎进入注册界面");
System.out.println("请输入您想要的id：");
String id=bufferedReader.readLine();
User user=userController.selectUserById(Integer.parseInt(id));
if (user==null){
System.out.println("请输入您的用户名：");
String userName=bufferedReader.readLine();
System.out.println("请输入您的密码");
String passWord=bufferedReader.readLine();
System.out.println("请输入您的密保问题：");
String question=bufferedReader.readLine();
System.out.println("请输入您的密保答案：");
String answer=bufferedReader.readLine();
User user1=new User(Integer.parseInt(id),userName,passWord,question,answer,1);
System.out.println(user1);
return userController.registerUser(user1);
}
}catch (IOException e){
System.out.println("io异常,登录失败！");
return false;
}
return false;
}
/**
* 教师注册页面
* 权限绑定为2
* @return boolean
*/
public boolean registerTeacherView(){
try {
System.out.println("欢迎进入注册界面");
System.out.println("请输入您想要的id：");
String id=bufferedReader.readLine();
User user=userController.selectUserById(Integer.parseInt(id));
if (user==null){
System.out.println("请输入您的用户名：");
String userName=bufferedReader.readLine();
System.out.println("请输入您的密码");
String passWord=bufferedReader.readLine();
System.out.println("请输入您的密保问题：");
String question=bufferedReader.readLine();
System.out.println("请输入您的密保答案：");
String answer=bufferedReader.readLine();
User user1=new User(Integer.parseInt(id),userName,passWord,question,answer,2);
System.out.println(user1);
return userController.registerUser(user1);
} else{
System.out.println("该id已存在,注册失败！");
return false;
}
}catch (IOException e){
System.out.println("io异常,登录失败！");
return false;
}
}
/**
* 添加用户页面
* @return boolean
*/
public boolean insertUserView(){
try {
System.out.println("欢迎进入增加用户界面");
System.out.println("请输入想要添加的用户id");
String id=bufferedReader.readLine();
User user=userController.selectUserById(Integer.parseInt(id));
if (user==null){
System.out.println("请输入想要添加的用户名：");
String userName=bufferedReader.readLine();
System.out.println("请输入密码：");
String passWord=bufferedReader.readLine();
System.out.println("请输入用户权限：");
String level=bufferedReader.readLine();
User user1=new User(Integer.parseInt(id),userName,passWord,null,null,Integer.parseInt(level));
System.out.println(user1);
return userController.insertUser(user1);
}
}catch (IOException e){
System.out.println("io异常，添加失败！");
return false;
}
return false;
}
/**
* 删除用户页面
* @return boolean
*/
public boolean deleteUserView(){
try {
System.out.println("欢迎进入删除用户界面");
System.out.println("请输入想要删除的用户id");
String id= null;
id = bufferedReader.readLine();
return userController.deleteUserById(Integer.parseInt(id));
} catch (IOException e) {
System.out.println("io异常，添加失败！");
return false;
}
}
/**
* 更改用户页面
* @return boolean
*/
public boolean updateUserView(){
try {
System.out.println("欢迎进入更改用户信息界面");
System.out.println("请输入用户id：");
String id=bufferedReader.readLine();
System.out.println("请输入密保答案：");
String answer=bufferedReader.readLine();
User user=userController.selectUserById(Integer.parseInt(id));
if (answer.equals(user.getAnswer())){
System.out.println("请输入想要修改成的用户名");
String userName=bufferedReader.readLine();
System.out.println("请输入想要改成的密码：");
String password=bufferedReader.readLine();
User user1=new User(user.getId(),userName,password,user.getQuestion(),user.getAnswer(),user.getLevel());
return userController.updateUserById(Integer.parseInt(id),user1);
}
}catch (IOException e){
System.out.println("io异常，更改失败！");
return false;
}
return false;
}
/**
* 查询用户页面
* @return void
*/
public void selectUserViewO(){
try {
System.out.println("********欢迎来到查询页面！********");
System.out.println("请选择你要选择的查询方式：");
System.out.println(" 1.查所有，2.根据id查询，3.根据用户名查询 ");
switch (Integer.parseInt(bufferedReader.readLine())){
case 1:
List<User> userList=userController.selectAllUser();
System.out.println("查询的结果是：");
System.out.println(userList.toString());
break;
case 2:
System.out.println("请输入你想要查询的id");
String id=bufferedReader.readLine();
User user=userController.selectUserById(Integer.parseInt(id));
System.out.println("查询的结果是：");
System.out.println(user.toString());
break;
case 3:
System.out.println("请输入你想查询的用户名");
String userName=bufferedReader.readLine();
User user1=userController.selectUserByUserName(userName);
System.out.println("查询的结果是：");
System.out.println(user1.toString());
break;
default:
System.out.println("输入指令错误！");
}
}catch (IOException e){
System.out.println("查询失败！");
}
}
}CourseView.java
代码语言：javascript复制package views;
import controller.CourseController;
import controller.UserController;
import entity.Course;
import entity.User;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
/**
* @Author: hyy
* @Date: 2020/12/18 22:37
*/
public class CourseView {
CourseController courseController=new CourseController();
/**
* 创建一个用户方向的对象 用来去 调用根据id查询用户方法 和getAnswer
* 去吧user和课程连接到一起、
*/
UserController userController=new UserController();
/**
* 一般流开了需要调close关掉，但是这种不可以关 ！！！
* new BufferedReader(new InputStreamReader(System.in));
* 还有try(){}catch{} 这种try括号里是会自动关闭资源的
* 所以一般流写里面不用再刻意去关闭
* 也因此上面的这种代码不可以放到那个括号里
*/
BufferedReader bufferedReader=new BufferedReader(new InputStreamReader(System.in));
/**
* 添加课程页面
* @return boolean
*/
public boolean insertCourseView(){
try {
System.out.println("—————————欢迎进入添加课程界面————————");
System.out.println("请输入想要添加的课程的用户id");
String id=bufferedReader.readLine();
System.out.println("请输入密保答案：");
String answer=bufferedReader.readLine();
User user= userController.selectUserById(Integer.parseInt(id));
if (user.getAnswer().equals(answer)){
System.out.println("请输入想要添加的课程名称：");
String courseName=bufferedReader.readLine();
System.out.println("请输入课程编号：");
String courseId=bufferedReader.readLine();
System.out.println("请输入课程任课老师：");
String courseTeacher=bufferedReader.readLine();
System.out.println("请输入课程可选人数：");
String courseNumber=bufferedReader.readLine();
Course course1=new Course(Integer.parseInt(id),courseName,courseId,courseTeacher,Integer.parseInt(courseNumber));
System.out.println(course1);
return courseController.insertCourseController(course1);
}
}catch (IOException e){
System.out.println("io异常，添加失败！");
return false;
}
return false;
}
/**
* 删除课程页面
* @return boolean
*/
public boolean deleteCourseView(){
try {
System.out.println("—————————欢迎进入删除课程界面————————");
System.out.println("请输入想要删除的课程的用户id");
String id=bufferedReader.readLine();
System.out.println("请输入想要删除的课程的课程编号：");
String courseId=bufferedReader.readLine();
System.out.println("请输入密保答案：");
String answer=bufferedReader.readLine();
User user= userController.selectUserById(Integer.parseInt(id));
if (user.getAnswer().equals(answer)){
return courseController.deleteCourseByCourseIdController(Integer.parseInt(id),courseId);
}
}catch (IOException e){
System.out.println("io异常，删除失败！");
return false;
}
return false;
}
/**
* 更改课程页面
* @return boolean
*/
public boolean updateCourseView(){
try {
System.out.println("—————————欢迎进入更改课程界面————————");
System.out.println("请输入想要更改的课程的用户id");
String id=bufferedReader.readLine();
System.out.println("请输入想要更改的课程的课程编号");
String courseId=bufferedReader.readLine();
System.out.println("请输入密保答案：");
String answer=bufferedReader.readLine();
System.out.println("请输入想要添加的课程名称：");
String courseName=bufferedReader.readLine();
System.out.println("请输入课程编号：");
String courseId1=bufferedReader.readLine();
System.out.println("请输入课程任课老师：");
String courseTeacher=bufferedReader.readLine();
System.out.println("请输入课程可选人数：");
String courseNumber=bufferedReader.readLine();
Course course=new Course(Integer.parseInt(id),courseName,courseId1,courseTeacher,Integer.parseInt(courseNumber));
User user= userController.selectUserById(Integer.parseInt(id));
if (user.getAnswer().equals(answer)){
return courseController.updateCourseByIdService(Integer.parseInt(id),courseId,course);
}
}catch (IOException e){
System.out.println("io异常，删除失败！");
return false;
}
return false;
}
/**
* 查询课程页面
*/
public void selectCourseView(){
try {
System.out.println("————————欢迎来到课程查询页面！————————");
System.out.println("请选择你要选择的查询方式：");
System.out.println(" 1.查所有人的课程，2.根据id查询该用户课程");
switch (Integer.parseInt(bufferedReader.readLine())){
case 1:
System.out.println("请输入您的id：");
String id1=bufferedReader.readLine();
User user=userController.selectUserById(Integer.parseInt(id1));
if (user.getLevel()==3||user.getLevel()==2) {
System.out.println(courseController.selectAllCourseService());
}else {
System.out.println("抱歉，您没有权限访问！");
}
break;
case 2:
System.out.println("请输入你想要查询的id：");
String id=bufferedReader.readLine();
System.out.println("请输入密保答案：");
String answer=bufferedReader.readLine();
User user1=userController.selectUserById(Integer.parseInt(id));
if (user1.getAnswer().equals(answer)){
System.out.println(courseController.selectCourseByIdController(Integer.parseInt(id)));
}else {
System.out.println("答案错误，查询失败！");
}
break;
default:
System.out.println("输入指令错误！");
break;
}
}catch (IOException e){
System.out.println("io异常，查询失败！");
}
}
}Sepration.java
代码语言：javascript复制package views;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
/**
* @Author: hyy
* @Date: 2020/12/18 20:17
* 最终页面
*/
public class SeparationView {
UserView userView=new UserView();
CourseView courseView=new CourseView();
BufferedReader bufferedReader=new BufferedReader(new InputStreamReader(System.in));
int tool=0;
boolean judgement=false;
String a=null;
public void separation(){
try {
System.out.println("————————是否进入学生选课系统？——————————");
System.out.println("——————————如果进入系统请输入yes，如果要不进入系统输入其他即可————————");
a=bufferedReader.readLine();
while (a.equals("yes")){
System.out.println("欢迎来到学生选课系统！！！");
System.out.println("——————————请输入你要进入的界面——————————");
System.out.println("1.学生登录，2.教师登录，3.管理员登录，4.学生注册，5，教师注册");
try {
switch (Integer.parseInt(bufferedReader.readLine())){
case 1:
judgement=userView.ordinaryStudentLoginView();
tool=1;
break;
case 2:
judgement=userView.ordinaryTeacherLoginView();
tool=2;
break;
case 3:
judgement=userView.administratorLoginView();
tool=3;
break;
case 4:
userView.registerStudentView();
judgement=userView.ordinaryStudentLoginView();
tool=1;
break;
case 5:
userView.registerTeacherView();
judgement=userView.ordinaryTeacherLoginView();
tool=2;
break;
default:
System.out.println("输入指令异常！");
break;
}
if (judgement&&tool==3){
System.out.println("-------请输入你要进入的界面----------");
System.out.println("1.增加用户 2.删除用户 3.更改用户 4.查询用户 5.添加课程 6.删除课程 7.更改课程 8.查询课程");
switch (Integer.parseInt(bufferedReader.readLine())){
case 1:
userView.insertUserView();
break;
case 2:
userView.deleteUserView();
break;
case 3:
userView.updateUserView();
break;
case 4:
userView.selectUserViewO();
break;
case 5:
courseView.insertCourseView();
break;
case 6:
courseView.deleteCourseView();
break;
case 7:
courseView.updateCourseView();
break;
case 8:
courseView.selectCourseView();
break;
default:
System.out.println("输入指令错误！");
break;
}
}else if (judgement&&tool==2){
System.out.println("-------请输入你要进入的界面----------");
System.out.println("1.更改个人信息 2.查询课程 ");
switch (Integer.parseInt(bufferedReader.readLine())){
case 1:
userView.updateUserView();
break;
case 2:
courseView.selectCourseView();
break;
default:
System.out.println("输入指令错误！");
break;
}
}else if (judgement&&tool==1){
System.out.println("-------请输入你要进入的界面----------");
System.out.println(" 1.更改个人信息 2.选课 3.退课 4.改课 5.查课");
switch (Integer.parseInt(bufferedReader.readLine())){
case 1:
userView.updateUserView();
break;
case 2:
courseView.insertCourseView();
break;
case 3:
courseView.deleteCourseView();
break;
case 4:
courseView.updateCourseView();
break;
case 5:
courseView.selectCourseView();
break;
default:
System.out.println("输入指令错误！");
break;
}
}
}catch (IOException e){
System.out.println("io异常，进入失败！");
}
System.out.println("是否重新进入系统？");
System.out.println("如果重新进入请输入yes，如果要退出系统输入其他即可");
a=bufferedReader.readLine();
}
System.out.println("欢迎下次进入！");
}catch (IOException e){
System.out.println("io异常，进入失败！");
}
}
}Test 测试类
代码语言：javascript复制import views.SeparationView;
/**
* @Author: hyy
* @Date: 2020/12/18 13:07
*/
public class UniversitySelectionCourseSystemTest {
public static void main(String[] args) {
SeparationView separationView=new SeparationView();
separationView.separation();
}
}uril包
Create.java
代码语言：javascript复制建文件夹及文件
package util;
/**
* @Author: hyy
* @Date: 2020/12/18 13:08
*/
public class Create {
public static void main(String[] args) {
CreateFileName createFileName=new CreateFileName();
CreatePathName createPathName=new CreatePathName();
// 创建目录
createPathName.create("UniversityCourseSelectionSystem");
// 创建文件
createFileName.create("UniversityCourseSelectionSystem\User.txt");
createFileName.create("UniversityCourseSelectionSystem\Order.txt");
createFileName.create("UniversityCourseSelectionSystem\Course.txt");
}
}CreateFileName
代码语言：javascript复制创建文件
package util;
import java.io.File;
import java.io.IOException;
/**
* @Author: hyy
* @Date: 2020/12/18 13:09
*/
public class CreateFileName {
/**
* 创建文件
* @param Filename
* @return boolean
*/
public boolean create(String Filename){
try {
File file=new File(Filename);
file.createNewFile();
if (file.exists()){
return false;
}
if (file.createNewFile()){
return true;
}
else {
return false;
}
}catch (IOException e){
return false;
}
}
}代码语言：javascript复制CreatePathName.java 创建目录
package util;
import java.io.File;
/**
* @Author: hyy
* @Date: 2020/12/18 13:08
*/
public class CreatePathName {
/**
* 创建目录
* @param Filename
* @return
*/
public boolean create(String Filename){
File file=new File(Filename);
if (file.exists()){
return false;
}
if (!Filename.endsWith(File.separator)) {
Filename = Filename File.separator;
}
if (file.mkdir()) {
return true;
} else {
return false;
}
}
}
