学生成绩管理系统(java语言).doc

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.cscore0=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 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;inum;i+)stusi=(Student)objIn.readObject();objIn.close();return stus;public void add(Student stus)throws ExceptionStudent s=new Studentstus.length+1;for(int i=0;is.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！);public 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(Student 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;istus.length;i+)if(stusi.no=no)System.out.println(stusi);break;if(stusi.no!=no&i=stus.length-1)System.out.println(无该生信息！);public void findByName(Student stus)String name=;System.out.print(请输入姓名：);name=scanner.next();for(int i=0;istus.length;i+)if(name.equalsIgnoreCase()=true)System.out.println(stusi);break;if(name.equalsIgnoreCase()=false&i=stus.length-1)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;istus.length;i+)if(stusi.no=no)System.out.println(stusi);stusi=null;save(stus);System.out.println(删除成功！);break;if(stusi.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.print(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(demo.