java IO流操作学生信息管理系统

1.//ObjectDemo

package zhangge;

import java.io.EOFException;

import java.io.FileInputStream;

import java.io.FileNotFoundException;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.ObjectInputStream;

import java.io.ObjectOutputStream;

import java.util.ArrayList;

import java.util.List;

import java.util.Scanner;

public class ObjectDemo {

/**

* @param args

*/

public static void main(String[] args) {

// TODO Auto-generated method stub

List <Student> list =new ArrayList<Student>();

int num=3;

menu();

int choice=-1;

Scanner sc =new Scanner(System.in);

System.out.println("请输入选择：");

choice=sc.nextInt();

while(choice!=3)

{

switch(choice)

{

case 1:

add();

break;

case 2:

query();

break;

default:

System.out.println("输入选项有错，请重新输入：");

break;

}

menu();

System.out.println("请输入选择：");

choice=sc.nextInt();

}

}

public static void menu()

{

System.out.println("---------------欢迎进入学生信息管理系统-------------------");

System.out.println("| |");

System.out.println("-------------------------------------------------");

System.out.println("1.添加学生 2.查询 3.退出 ");

System.out.println("-------------------------------------------------");

}

public static void add()

{

FileOutputStream fil=null;

ObjectOutputStream file=null;

FileInputStream fil1=null;

ObjectInputStream file1=null;

try {

fil1 = new FileInputStream("d://zhangge.txt");

file1=new ObjectInputStream(fil1);

} catch (FileNotFoundException e) {

// TODO Auto-generated catch block

e.printStackTrace();

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

Student student;

List <Student> list =new ArrayList<Student>();

try {

while(true)

{

try

{

student =(Student) (file1.readObject());

list.add(student);

System.out.println("学号 姓名 性别 年龄 专业");

System.out.println(student.getnumber()+student.getname()+student.getsex()+student.getage()+student.getmajor());

}catch(EOFException e)

{

break;

}

}

} catch (ClassNotFoundException e) {

// TODO Auto-generated catch block

e.printStackTrace();

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

finally{

try {

file1.close();

fil1.close();

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

try {

fil = new FileOutputStream("d://zhangge.txt");

file = new ObjectOutputStream(fil);

} catch (FileNotFoundException e) {

// TODO Auto-generated catch block

e.printStackTrace();

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

Scanner sc = new Scanner(System.in);

int number;

String name;

String sex;

int age;

String major;

System.out.print("输入学号：");

number=sc.nextInt();

System.out.print("输入姓名：");

name=sc.next();

System.out.print("输入性别：");

sex=sc.next();

System.out.print("输入年龄：");

age=sc.nextInt();

System.out.print("输入专业：");

major=sc.next();

Student student1 = new Student( number , name , sex, age , major);

System.out.println("是否保存Y/N");

String str=null;

str=sc.next();

if(str.compareTo("Y")==0)

{

try {

list.add(student1);

for(int i=0;i<list.size();i++)

{

file.writeObject(list.get(i));

}

System.out.println("学号 姓名 性别 年龄 专业");

System.out.println(student1.getnumber()+student1.getname()+student1.getsex()+student1.getage()+student1.getmajor());

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

finally{

try {

file.close();

fil.close();

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

}

if(str.compareTo("N")==0)

{

try {

for(int i=0;i<list.size();i++)

{

file.writeObject(list.get(i));

}

System.out.println("学号 姓名 性别 年龄 专业");

System.out.println(student1.getnumber()+student1.getname()+student1.getsex()+student1.getage()+student1.getmajor());

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

finally{

try {

file.close();

fil.close();

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

}

}

public static void query()

{

FileInputStream fil1=null;

ObjectInputStream file1=null;

try {

fil1 = new FileInputStream("d://zhangge.txt");

file1=new ObjectInputStream(fil1);

} catch (FileNotFoundException e) {

// TODO Auto-generated catch block

e.printStackTrace();

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

Student student;

List <Student> list =new ArrayList<Student>();

try {

while(true)

{

try

{

student =(Student) (file1.readObject());

System.out.println("学号 姓名 性别 年龄 专业");

System.out.println(student.getnumber()+student.getname()+student.getsex()+student.getage()+student.getmajor());

}catch(EOFException e)

{

break;

}

}

} catch (ClassNotFoundException e) {

// TODO Auto-generated catch block

e.printStackTrace();

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

finally{

try {

file1.close();

fil1.close();

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

}

}

//2.Student

package zhangge;

import java.io.Serializable;

public class Student implements Serializable{

private int number;

private String name;

private String sex;

private int age;

private String major;

public Student()

{

super();

}

public Student(int number , String name ,String sex, int age , String major )

{

this.number=number;

this.name=name;

this.sex=sex;

this.major=major;

}

public void setnumber(int number)

{

this.number=number;

}

public int getnumber()

{

return this.number;

}

public void setname(String name)

{

this.name=name;

}

public String getname()

{

return this.name;

}

public void setage(int age)

{

this.age=age;

}

public int getage()

{

return this.age;

}

public void setsex(String sex)

{

this.sex=sex;

}

public String getsex()

{

return this.sex;

}

public void setmajor(String major)

{

this.major=major;

}

public String getmajor()

{

return this.major;

}

}