学生成绩管理系统(java语言)(共3页)

1、精选优质文档-倾情为你奉上学生成绩管理系统import java.util.*;import java.io.*;class Student implements Serializable String name;long no;private String course="os","java","math"double cscore=0,0,0; public Student(String name,long no,double a,double b,double c)=name;this.no=no;this.c

2、score0=a;this.cscore1=b;this.cscore2=c;Override public String toString()return +" "+this.no+" "+this.course0+":"+this.cscore0+" "+this.course1+":"+this.cscore1+" "+this.course2+":"+this.cscore2;public class Objectprivate

3、static Scanner scanner=new Scanner(System.in);public Student read()throws ExceptionObjectInputStream objIn=new ObjectInputStream(new FileInputStream("stus.data");int num=objIn.readInt();Student stus=new Studentnum;for(int i=0;i<num;i+)stusi=(Student)objIn.readObject();objIn.close();retu

4、rn stus;public void add(Student stus)throws ExceptionStudent s=new Studentstus.length+1;for(int i=0;i<s.length-1;i+)si=stusi;System.out.print("请输入要添加的学生信息：n"+"姓名：");String name=scanner.next();System.out.print("学号：");long no=scanner.nextInt();System.out.print("os

5、成绩：");double cscore0=scanner.nextDouble();System.out.print("java成绩：");double cscore1=scanner.nextDouble();System.out.print("math成绩：");double cscore2=scanner.nextDouble();ss.length-1=new Student(name,no,cscore0,cscore1,cscore2);save(s);System.out.println("添加成功！");pu

6、blic void dispAll(Student stus)System.out.println("现有Student信息为：");for(Student stu:stus)System.out.println(stu);public void save(Student stus)throws ExceptionObjectOutputStream objOut=new ObjectOutputStream(new FileOutputStream("stus.data");objOut.writeInt(stus.length);for(Studen

7、t stu:stus)objOut.writeObject(stu);objOut.close();public void findById(Student stus)int no=0,i=0;System.out.print("请输入学号：");no=scanner.nextInt();for(i=0;i<stus.length;i+)if(stusi.no=no)System.out.println(stusi);break;if(stusi.no!=no&&i=stus.length-1)System.out.println("无该生信

8、息！");public void findByName(Student stus)String name=""System.out.print("请输入姓名：");name=scanner.next();for(int i=0;i<stus.length;i+)if(name.equalsIgnoreCase()=true)System.out.println(stusi);break;if(name.equalsIgnoreCase()=false&&i=stus.length-1

9、)System.out.println("无该生信息！");public void delById(Student stus)throws Exceptionint no=0,i=0;System.out.print("请输入学号：");no=scanner.nextInt();for(i=0;i<stus.length;i+)if(stusi.no=no)System.out.println(stusi);stusi=null;save(stus);System.out.println("删除成功！");break;if(st

10、usi.no!=no&&i=stus.length-1)System.out.println("无该生信息！");public static void main(String args)throws ExceptionObject demo=new Object();Student stus=new Student("zhang",1,90,90,98),new Student("wang",2,80,80,89),new Student("li",3,70,70,79);System.out.pr

11、int("请输入操作的编号：");System.out.print("n");int choice=0;doSystem.out.println("1 添加 2 显示所有学生信息 3 按学号查找 4 按姓名查找 5 按学号删除 6 保存 0 退出");choice=scanner.nextInt();switch(choice)case 1: demo.add(demo.read();break;case 2: demo.dispAll(demo.read();break;case 3: demo.findById(demo.read();break;case 4: demo.findByName(