Java实现简单的学生信息管理系统（二）-源码
Java实现简单的学生信息管理系统目录github项目地址：https://github.com/asd123pwj/SimpleStudentManageSystemBasedOnJAVA
源码：https://mwhls.lanzous.com/iOCT3jw66le
学生信息管理系统源码-课程类
package school;
public class Course{
public String courseName;
public String courseNum;
public double courseGrade;
public boolean isFinish = false;
//未考试的课程
public Course(String courseName, String courseNum){
this.courseName = courseName;
this.courseNum = courseNum;
}
//考完试的课程，构造方法重载
public Course(String courseName, String courseNum, double grade){
this.courseName = courseName;
this.courseNum = courseNum;
this.courseGrade = grade;
this.isFinish = true;
}
//为未考试的课程输入课程成绩
public void inputGrade(double grade) {
courseGrade = grade;
isFinish = true;
}
}
学生信息管理系统源码-学生课程类
package school;
public class StudentCourse {
Course courseGroup[]; //存储学生选课信息
int failCourseNum = 0; //学生挂科数
int finishCourseNum = 0; //学生结课数
//显示学生选课课程信息
public void showCourseInfo() {
if(courseGroup == null) return;
for(Course course : courseGroup) {
System.out.print("课程名称："+course.courseName);
System.out.print("\t课程号："+course.courseNum);
if(course.isFinish) {
System.out.print("\t成绩：" + course.courseGrade);
}
System.out.println("");
}
}
//增加学生课程
public void addStudentCourse(String courseName, String courseNum) {
addStudentCourse(new Course(courseName, courseNum));
}
//增加学生课程
public void addStudentCourse(String courseName, String courseNum, double courseGrade) {
addStudentCourse(new Course(courseName, courseNum, courseGrade));
}
//增加学生课程
private void addStudentCourse(Course course) {
if(course.courseGrade<60 && course.isFinish) failCourseNum+=1;
if(course.isFinish) finishCourseNum += 1;
Course[] tempCourse = {course};
if(courseGroup != null) {
Course[] newCourse = new Course[courseGroup.length + 1];
System.arraycopy(courseGroup, 0, newCourse, 0, courseGroup.length);
System.arraycopy(tempCourse, 0, newCourse, newCourse.length-1, 1);
courseGroup = newCourse;
}
else {
courseGroup = tempCourse;
}
}
//学生成绩录入
public void inputStudentGrade(String courseNum, double grade) {
boolean hasInput = false;
for(Course course: courseGroup) {
if(course.courseNum.contentEquals(courseNum)) {
course.inputGrade(grade);
finishCourseNum += 1;
course.isFinish = true;
if(course.courseGrade<60) failCourseNum+=1;
hasInput = true;
}
}
if(!hasInput)
System.out.println("未找到该课程。");
}
//计算课程平均分
public double getAverageGrade() {
double sum = 0;
for(Course course:courseGroup) {
sum += course.courseGrade;
}
return sum/(finishCourseNum);
}
//计算课程最低分
public double getMinGrade() {
double min = 100;
for(Course course:courseGroup) {
if(course.isFinish)
min = min<course.courseGrade ? min : course.courseGrade;
}
return min;
}
//计算课程最高分
public double getMaxGrade() {
double max = 0;
for(Course course:courseGroup) {
if(course.isFinish)
max = max>course.courseGrade ? max : course.courseGrade;
}
return max;
}
}
学生信息管理系统源码-学生类
package school;
import java.util.*;
public class Student {
public String studentNum;
public String studentName;
public String studentSex;
public String studentAddr;
public String studentSchool;
public String studentAcademy;
public String studentMajor;
public StudentCourse studentCourse = new StudentCourse();
public Student() {
;
}
public Student(String num, String name, String sex, String addr, String school, String academy, String major){
studentNum = num;
studentName = name;
studentSex = sex;
studentAddr = addr;
studentSchool = school;
studentAcademy = academy;
studentMajor = major;
}
//添加学生课程
//显示学生信息。
public void showStudentInfo() {
System.out.println("学号：" + studentNum);
System.out.println("姓名：" + studentName);
System.out.println("性别：" + studentSex);
System.out.println("生源地：" + studentAddr);
System.out.println("学校：" + studentSchool);
System.out.println("学院：" + studentAcademy);
System.out.println("专业：" + studentMajor);
// showStudentCourseInfo();
}
public void showStudentCourseInfo() {
studentCourse.showCourseInfo();
if(studentCourse.courseGroup == null || studentCourse.finishCourseNum==0) return;
getAverageGrade();
System.out.println("最低分："+getMinGrade()+"，最高分："+getMaxGrade());
if(studentCourse.failCourseNum>=3) {
System.out.println("！警告！当前学生挂科数过多，挂科数：" + studentCourse.failCourseNum);
}
}
//计算课程平均分
public void getAverageGrade() {
System.out.println("各课程平均分为：" + studentCourse.getAverageGrade());
}
//计算课程最低分
public double getMinGrade() {
return studentCourse.getMinGrade();
}
//计算课程最高分
public double getMaxGrade() {
return studentCourse.getMaxGrade();
}
public void addCourse(Scanner reader) {
System.out.print("输入课程名称、课程号：");
String courseName = reader.next();
String courseNum = reader.next();
System.out.print("课程已结课？y/n：");
String hasGrade = reader.next();
if(hasGrade.contentEquals("y")) {
System.out.print("输入课程成绩：");
double courseGrade = reader.nextDouble();
studentCourse.addStudentCourse(courseName, courseNum, courseGrade);
}
else if(hasGrade.contentEquals("n")) {
studentCourse.addStudentCourse(courseName, courseNum);
}
}
public void addCourseGrade(Scanner reader) {
System.out.print("请输入待修改成绩课程的课程号：");
String courseNum = reader.next();
System.out.print("请输入成绩：");
double grade = reader.nextDouble();
studentCourse.inputStudentGrade(courseNum, grade);
}
}学生信息管理系统源码-学生组类
package school;
import java.util.Scanner;
public class StudentGroup {
Student[] studentGroup;
public void addStudent(Scanner reader) {
System.out.print("请输入学生学号、姓名、性别、生源地、所在学校、学院、专业：");
String studentNum = reader.next();
String studentName = reader.next();
String studentSex = reader.next();
String studentAddr = reader.next();
String studentSchool = reader.next();
String studentAcademy = reader.next();
String studentMajor = reader.next();
if(studentGroup == null) {
studentGroup = new Student[1];
studentGroup[0] = new Student(studentNum, studentName, studentSex, studentAddr, studentSchool, studentAcademy, studentMajor);
}
else {
Student[] temp = new Student[1];
temp[0] = new Student(studentNum, studentName, studentSex, studentAddr, studentSchool, studentAcademy, studentMajor);
Student[] newGroup = new Student[studentGroup.length + 1];
System.arraycopy(studentGroup, 0, newGroup, 0, studentGroup.length);
System.arraycopy(temp, 0, newGroup, newGroup.length-1, 1);
studentGroup = newGroup;
}
}
public void showStudentGroup() {
if(studentGroup == null) {
System.out.println("无任何学生信息。");
return;
}
System.out.println("学生学号列表：");
for(Student student:studentGroup) {
System.out.print(student.studentNum+" ");
}
System.out.println("");
}
public Student findStudent(Scanner reader) {
System.out.print("输入学生学号：");
String studentNum = reader.next();
if(studentGroup == null) {
System.out.println("无此学生。");
return null;
}
for(Student student:studentGroup) {
if(studentNum.contentEquals(student.studentNum)) {
return student;
}
}
System.out.println("无此学生。");
return null;
}
public void addStudentCourse(Scanner reader) {
Student student = findStudent(reader);
if(student!=null)
student.addCourse(reader);
}
public void inputStudentCourseGrade(Scanner reader) {
Student student = findStudent(reader);
if(student!=null)
student.addCourseGrade(reader);
}
public void showStudentInfo(Scanner reader) {
Student student = findStudent(reader);
if(student!=null)
student.showStudentInfo();
}
public void showStudentCourseInfo(Scanner reader) {
Student student = findStudent(reader);
if(student!=null)
student.showStudentCourseInfo();
}
}
学生信息管理系统源码-学校类
package school;
import java.util.*;
public class School {
public static void main(String args[]) {
boolean showMenu = true;
Scanner reader = new Scanner(System.in);
StudentGroup studentGroup = new StudentGroup();
while(true) {
if(showMenu) {
System.out.println("\n学生管理菜单：");
System.out.println("1.学生信息一览。");
System.out.println("2.新增学生。");
System.out.println("3.学生选课。");
System.out.println("4.学生成绩录入。");
System.out.println("5.特定学生信息查询。");
System.out.println("6.特定学生课程查询。");
System.out.println("7.显示/隐藏学生管理菜单。");
System.out.println("8.退出。");
System.out.print("输入序号进入管理：");
}
else {
System.out.print("输入序号进入管理(7:显示菜单)：");
}
switch(reader.nextInt()) {
case 1:
studentGroup.showStudentGroup();
break;
case 2:
studentGroup.addStudent(reader);
break;
case 3:
studentGroup.addStudentCourse(reader);
break;
case 4:
studentGroup.inputStudentCourseGrade(reader);
break;
case 5:
studentGroup.showStudentInfo(reader);
break;
case 6:
studentGroup.showStudentCourseInfo(reader);
break;
case 7:
showMenu = !showMenu;
break;
case 8:
reader.close();
return ;
}
}
}
}
研究生信息管理系统源码-研究生类
package graduateSchool;
import school.Student;
public class GraduateStudent extends Student {
public String tutorName;
public String researchName;
//在子类中使用父类构造方法
GraduateStudent(String num, String name, String sex, String addr, String school, String academy, String major, String tutorName, String researchName){
super(num, name, sex, addr, school, academy, major);
this.tutorName = tutorName;
this.researchName = researchName;
}
//计算课程平均分，覆盖父类方法。
public void getAverageGrade() {
System.out.println(this.studentName + "为研究生，其平均成绩为：" + studentCourse.getAverageGrade());
}
//研究生信息展示，覆盖父类方法，并调用被覆盖的父类方法。
public void showStudentInfo() {
System.out.println("\n"+super.studentName+"为研究生。");
super.showStudentInfo();
System.out.println("导师："+ tutorName);
System.out.println("课题名称："+ researchName);
}
}
研究生信息管理系统源码-研究生组类
package graduateSchool;
import java.util.Scanner;
import school.*;
public class GraduateStudentGroup extends StudentGroup {
Student[] studentGroup;
public void addStudent(Scanner reader) {
System.out.print("请输入研究生学号、姓名、性别、生源地、所在学校、学院、专业、导师名、课题名称：");
String studentNum = reader.next();
String studentName = reader.next();
String studentSex = reader.next();
String studentAddr = reader.next();
String studentSchool = reader.next();
String studentAcademy = reader.next();
String studentMajor = reader.next();
String tutorName = reader.next();
String researchName = reader.next();
if(studentGroup == null) {
studentGroup = new GraduateStudent[1];
studentGroup[0] = new GraduateStudent(studentNum, studentName, studentSex, studentAddr, studentSchool, studentAcademy, studentMajor, tutorName, researchName);
}
else {
Student[] temp = new GraduateStudent[1];
temp[0] = new GraduateStudent(studentNum, studentName, studentSex, studentAddr, studentSchool, studentAcademy, studentMajor, tutorName, researchName);
Student[] newGroup = new GraduateStudent[studentGroup.length + 1];
System.arraycopy(studentGroup, 0, newGroup, 0, studentGroup.length);
System.arraycopy(temp, 0, newGroup, newGroup.length-1, 1);
studentGroup = newGroup;
}
}
public void showStudentGroup() {
if(studentGroup == null) {
System.out.println("无任何学生信息。");
return;
}
System.out.println("学生学号列表：");
for(Student student:studentGroup) {
System.out.print(student.studentNum+" ");
}
System.out.println("");
}
public Student findStudent(Scanner reader) {
System.out.print("输入学生学号：");
String studentNum = reader.next();
if(studentGroup == null) {
System.out.println("无此学生。");
return null;
}
for(Student student:studentGroup) {
if(studentNum.contentEquals(student.studentNum)) {
return student;
}
}
System.out.println("无此学生。");
return null;
}
}
研究生信息管理系统源码-学校类
package graduateSchool;
import java.util.*;
public class School {
public static void main(String args[]) {
boolean showMenu = true;
Scanner reader = new Scanner(System.in);
GraduateStudentGroup studentGroup = new GraduateStudentGroup();
while(true) {
if(showMenu) {
System.out.println("\n研究生管理菜单：");
System.out.println("1.研究生信息一览。");
System.out.println("2.新增研究生。");
System.out.println("3.研究生选课。");
System.out.println("4.研究生成绩录入。");
System.out.println("5.特定研究生信息查询。");
System.out.println("6.特定研究生课程查询。");
System.out.println("7.显示/隐藏研究生管理菜单。");
System.out.println("8.退出。");
System.out.print("输入序号进入管理：");
}
else {
System.out.print("输入序号进入管理(7:显示菜单)：");
}
switch(reader.nextInt()) {
case 1:
studentGroup.showStudentGroup();
break;
case 2:
studentGroup.addStudent(reader);
break;
case 3:
studentGroup.addStudentCourse(reader);
break;
case 4:
studentGroup.inputStudentCourseGrade(reader);
break;
case 5:
studentGroup.showStudentInfo(reader);
break;
case 6:
studentGroup.showStudentCourseInfo(reader);
break;
case 7:
showMenu = !showMenu;
break;
case 8:
reader.close();
return ;
}
}
}
}
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