Kod sumber sistem pengurusan fail prestasi pelajar:
pelajar
public class students{
private String name;
private String number;
private int chinascore;
private int mathscore;
private int englishscore;
private int physcore;
public students(String name, String number, int chinascore, int mathscore, int englishscore, int physcore) {
this.name = name;
this.number = number;
this.chinascore = chinascore;
this.mathscore = mathscore;
this.englishscore = englishscore;
this.physcore = physcore;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getNumber() {
return number;
}
public void setNumber(String number) {
this.number = number;
}
public int getChinascore() {
return chinascore;
}
public void setChinascore(int chinascore) {
this.chinascore = chinascore;
}
public int getMathscore() {
return mathscore;
}
public void setMathscore(int mathscore) {
this.mathscore = mathscore;
}
public int getEnglishscore() {
return englishscore;
}
public void setEnglishscore(int englishscore) {
this.englishscore = englishscore;
}
public int getPhyscore() {
return physcore;
}
public void setPhyscore(int physcore) {
this.physcore = physcore;
}
}Salin selepas log masuk
pangkalan data
rreee
studentdao
import java.util.ArrayList;
import java.util.List;
public class database {
List<students> studentsList = new ArrayList<>();
public database() {
studentsList.add(new students("张三", "1", 1, 1, 1, 1));
studentsList.add(new students("李四", "2", 8, 2, 2, 2));
studentsList.add(new students("王五", "3", 1, 3, 3, 3));
studentsList.add(new students("赵六", "4", 6, 4, 4, 4));
}
public List<students> getStudentsList() {
return studentsList;
}
public void setStudentsList(List<students> studentsList) {
this.studentsList = studentsList;
}
}Salin selepas log masuk
perkhidmatan
import java.util.List;
import java.util.Scanner;
public class studentdao {
database database;
public studentdao(database dataBase) {
this.database = dataBase;
}
//对全部学生信息打印
public void print() {
List<students> list = database.getStudentsList();
System.out.println("学生学号：" + "学生姓名" + " 语文：" + "数学：" + "英语：" + "物理："+"学生总分");
for (students students : database.getStudentsList()) {
int x=students.getChinascore()+students.getMathscore()+students.getEnglishscore()+students.getPhyscore();
System.out.println("" + students.getNumber() + " " + students.getName() + " " + students.getChinascore()
+ " " + students.getMathscore() + " " + students.getEnglishscore() + " " + students.getPhyscore()+" "+x);
}
for(int i=0;i<=list.size();i++){
int x=list.get(i).getChinascore()+list.get(i).getMathscore() +list.get(i).getEnglishscore()+list.get(i).getPhyscore();
System.out.println((i+1)+list.get(i).getNumber()+list.get(i).getName()+list.get(i).getChinascore()+list.get(i).getMathscore() +list.get(i).getEnglishscore()+list.get(i).getPhyscore() +x);
}
}
//添加新的学生
public void add() {
String number;
String name;
int grade1;
int grade2;
int grade3;
int grade4;
Scanner scanner = new Scanner(System.in);
System.out.println("输入学生的学号：");
number = scanner.next();
System.out.println("输入学生的姓名：");
name = scanner.next();
System.out.println("输入学生的语文成绩：");
grade1 = scanner.nextInt();
System.out.println("输入学生的数学成绩：");
grade2 = scanner.nextInt();
System.out.println("输入学生的英语成绩：");
grade3 = scanner.nextInt();
System.out.println("输入学生的物理成绩：");
grade4 = scanner.nextInt();
students students = new students(name, number, grade1, grade2, grade3, grade4);
List<students> studentsList = database.getStudentsList();
studentsList.add(students);
}
//输入姓名或者学号来查询学生信息
public void searchstudent() {
Scanner scanner = new Scanner(System.in);
findbynumber();
}
//通过输入学号来查询信息
public void findbynumber() {
Scanner scanner = new Scanner(System.in);
System.out.println("输入学生的学号：");
String number = scanner.next();
for (students students : database.getStudentsList()) {
if (students.getNumber().equals(number)) {
System.out.println("学生学号：" + students.getNumber() + "学生姓名：" + students.getName()
+ "语文：" + students.getChinascore() + "数学：" + students.getMathscore()
+ "英语：" + students.getEnglishscore() + "物理：" + students.getPhyscore());
}
}
}
//通过学号来修改科目成绩
public void changescore() {
Scanner scanner = new Scanner(System.in);
System.out.println("输入学号：");
String number = scanner.next();
students students = null;
for (students a : database.getStudentsList()) {
if (a.getNumber().equals(number)) {
students = a;
}
}
if (students != null) {
System.out.println("查找成功！");
System.out.println("学生学号：" + students.getNumber() + "学生姓名：" + students.getName()
+ "语文：" + students.getChinascore() + "数学：" + students.getMathscore()
+ "英语：" + students.getEnglishscore() + "物理：" + students.getPhyscore());
System.out.println("输入要修改的语文的成绩：");
int grade1 = scanner.nextInt();
System.out.println("输入要修改的数学的成绩：");
int grade2 = scanner.nextInt();
System.out.println("输入要修改的英语的成绩：");
int grade3 = scanner.nextInt();
System.out.println("输入要修改的物理的成绩：");
int grade4 = scanner.nextInt();
students.setChinascore(grade1);
students.setMathscore(grade2);
students.setEnglishscore(grade3);
students.setPhyscore(grade4);
System.out.println("修改完成！");
System.out.println("学生学号：" + students.getNumber() + "学生姓名：" + students.getName()
+ "语文：" + students.getChinascore() + "数学：" + students.getMathscore()
+ "英语：" + students.getEnglishscore() + "物理：" + students.getPhyscore());
} else {
System.out.println("未找到该学生!");
}
}
//双向冒泡排序
public List<students> bub(List<students> studentList) {
List<students> list = database.getStudentsList();
students student = null;
int left = 0, right = database.getStudentsList().size() - 1;
while (left < right) {
for (int i = left + 1; i <= right; i++) {
if (list.get(left).getChinascore() + list.get(left).getMathscore() + list.get(left).getEnglishscore() + list.get(left).getPhyscore() < list.get(i).getChinascore() + list.get(i).getMathscore() + list.get(i).getEnglishscore() + list.get(i).getPhyscore()) {
student = list.get(i);
list.set(i, list.get(left));
list.set(left, student);
}
}
left++;
for (int i = right - 1; i >= left; i--) {
if (list.get(right).getChinascore() + list.get(right).getMathscore() + list.get(right).getEnglishscore() + list.get(right).getPhyscore() > list.get(i).getChinascore() + list.get(i).getMathscore() + list.get(i).getEnglishscore() + list.get(i).getPhyscore()) {
{
student = list.get(i);
list.set(i, list.get(right));
list.set(right, student);
}
}
right--;
}
}
return list;
}
//希尔排序
public void shellSort () {
List<students> list = database.getStudentsList();
students student = null;
students student1 = null;
int j;
for (int gap = list.size() / 2; gap > 0; gap /= 2) {
for (int i = gap; i < list.size(); i++) {
student = list.get(i);
int tmp = student.getChinascore() + student.getMathscore() + student.getEnglishscore() + student.getPhyscore();
for (j = i; j >= gap && tmp > list.get(j - gap).getChinascore() + list.get(j - gap).getMathscore() + list.get(j - gap).getEnglishscore() + list.get(j - gap).getPhyscore(); j -= gap) {
list.set(j, list.get(j - gap));
}
list.set(j, student);
}
}
}
//快速排序
public void quickSort1 ( int left, int right){
List<students> studentsList = database.getStudentsList();
if (left < right) {
int i = left, j = right;
students student = studentsList.get(left);
int x = student.getChinascore() + student.getMathscore() + student.getEnglishscore() + student.getPhyscore();
while (i < j) {
while ((i < j) && (studentsList.get(j).getChinascore() + studentsList.get(j).getMathscore() + studentsList.get(j).getEnglishscore() + studentsList.get(j).getPhyscore()) < x) {
j--;
}
if (i < j) {
studentsList.set(i, studentsList.get(j));
i++;
}
while ((i < j) && (studentsList.get(i).getChinascore() + studentsList.get(i).getMathscore() + studentsList.get(i).getEnglishscore() + studentsList.get(i).getPhyscore() > x)) {
i++;
}
if (i < j) {
studentsList.set(j, studentsList.get(i));
j--;
}
}
studentsList.set(i, student);
quickSort1(left, i - 1);
quickSort1(i + 1, right);
}
}
//堆排序
//移除位在第一个数据的根节点，并做最大堆调整的递归运算
public List<students> heapSort(List<students> studentList){
List<students> list=studentList;
int len = list.size();
buildMaxHeap(list, len);
for (int i = len - 1; i > 0; i--) {
swap(list, 0, i);
len--;
heapify(list, 0, len);
}
return list;
}
//将堆中的所有数据重新排序堆排序（HeapSort）
private void buildMaxHeap(List<students> studentList, int len) {
for (int i = (int) Math.floor(len / 2); i >= 0; i--) {
heapify(studentList, i, len);
}
}
private void heapify(List<students> studentList, int i, int len) {
int left = 2 * i + 1;
int right = 2 * i + 2;
int largest = i;
if (left < len && studentList.get(left).getChinascore() + studentList.get(left).getMathscore() + studentList.get(left).getEnglishscore() + studentList.get(left).getPhyscore()< studentList.get(largest).getChinascore() + studentList.get(largest).getMathscore() + studentList.get(largest).getEnglishscore() + studentList.get(largest).getPhyscore()) {
largest = left;
}
if (right < len && studentList.get(right).getChinascore() + studentList.get(right).getMathscore() + studentList.get(right).getEnglishscore() + studentList.get(right).getPhyscore()< studentList.get(largest).getChinascore() + studentList.get(largest).getMathscore() + studentList.get(largest).getEnglishscore() + studentList.get(largest).getPhyscore()) {
largest = right;
}
if (largest != i) {
swap(studentList, i, largest);
heapify(studentList, largest, len);
}
}
private void swap(List<students> studentList, int i, int j) {
students student=studentList.get(i);
studentList.set(i,studentList.get(j));
studentList.set(j,student);
}
}Salin selepas log masuk
teks
import java.util.Scanner;
public class service {
private studentdao studentdao;
;
private database database;
public service(database dataBase) {
studentdao = new studentdao(dataBase);
this.database = dataBase;
}
public void start() {
Scanner scanner = new Scanner(System.in);
System.out.println("1.增加学生信息");
System.out.println("2.浏览学生信息");
System.out.println("3.修改学生成绩");
System.out.println("4.排序学生成绩");
System.out.println("5.学生信息查询");
int choice = scanner.nextInt();
switch (choice) {
case 1:
add();
break;
case 2:
studentdao.print();
System.out.println("是否回到主界面0.回到1.不会");
int k=scanner.nextInt();
if(k==0) {
start();
}
break;
case 3:
changeit();break;
case 4:
rank();
break;
case 5:
search();break;
}
}
//选择排序方式
public void rank(){
System.out.println("1.希尔排序");
System.out.println("2.冒泡排序");
System.out.println("3.快速排序");
System.out.println("4.堆排序");
System.out.println("输入0返回菜单");
Scanner scanner = new Scanner(System.in);
int a=scanner.nextInt();
switch (a){
case 1:
studentdao.shellSort();
studentdao.print();
System.out.println("是否回到主界面0.回到1.不会");
int p=scanner.nextInt();
if(p==0) {
start();
}
break;
case 2:
studentdao.bub(database.getStudentsList());
studentdao.print();
System.out.println("是否回到主界面0.回到1.不会");
int k=scanner.nextInt();
if(k==0) {
start();
}
break;
case 3:
studentdao.quickSort1(0,database.getStudentsList().size()-1);
studentdao.print();
System.out.println("是否回到主界面0.回到1.不会");
int o=scanner.nextInt();
if(o==0) {
start();
}
break;
case 4:
studentdao.heapSort(database.getStudentsList());
studentdao.print();
System.out.println("是否回到主界面0.回到1.不会");
int k1=scanner.nextInt();
if(k1==0) {
start();
}
break;
case 0:start();
break;
}
}
//查找学生信息
public void search(){
studentdao.searchstudent();
Scanner scanner=new Scanner(System.in);
System.out.println("是否回到主界面0.回到1.不会");
int k=scanner.nextInt();
if(k==0) {
start();
}
}
//更改学生信息
public void changeit(){
studentdao.changescore();
System.out.println("是否回到主界面0.回到1.不会");
Scanner scanner=new Scanner(System.in);
int k=scanner.nextInt();
if(k==0) {
start();
}
}
//增加学生
public void add(){
studentdao.add();
System.out.println("是否回到主界面0.回到1.不会");
Scanner scanner=new Scanner(System.in);
int k=scanner.nextInt();
if(k==0) {
start();
}
}
}Salin selepas log masuk
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