java实现简单学生成绩档案管理系统

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;

    }

}

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;

    }

}

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);

    }

    }

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();

        }

    }

}

public class text {

    public static void main(String[]args){

        database database = new database();

        service studentsSer= new service(database);

        studentsSer.start();

    }

}