日期:2014-05-20  浏览次数:20811 次

菜鸟求助:关于objectoutputstream
把十个学生信息(假设每个信息都有三个属性)写入文件   可以用循环吗?怎么用

------解决方案--------------------
//*******下面是学生类********
import java.io.Serializable;

public class Student implements Serializable {//被序列化的类必须扩展Serializable接口,并且得有一个ID。

private static final long serialVersionUID = 1L;//上面所说的ID
private String name;
private int age;
private String sex;

public Student(String name,int age,String sex)//构造函数
{
this.name = name;
this.age = age;
this.sex = sex;
}

//以下为各属性的setter和getter方法
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getSex() {
return sex;
}
public void setSex(String sex) {
this.sex = sex;
}
}

//*********下面是序列化的代码*******
import java.io.FileOutputStream;
import java.io.ObjectOutputStream;
import java.io.FileNotFoundException;
import java.io.FileInputStream;
import java.io.ObjectInputStream;
import java.io.IOException;

public class Test {

public static void main(String[] args)
{
Student[] student ={new Student( "student1 ",22, "男 "),
new Student( "student2 ",21, "女 "),
new Student( "student3 ",20, "男 "),
new Student( "student4 ",19, "女 "),
new Student( "student5 ",18, "男 "),
new Student( "student6 ",17, "男 "),
new Student( "student7 ",22, "女 "),
new Student( "student8 ",22, "女 "),
new Student( "student9 ",22, "女 "),
new Student( "student10 ",22, "男 "),};

try
{
//写入文件
ObjectOutputStream oos = new ObjectOutputStream(
new FileOutputStream( "haoguicai000.txt "));
oos.writeObject(student);//这里存的是数组对象,你也可以用循环把每一个Student对象写进去。

//从文件中读出对象
Student[] students2;
ObjectInputStream ois = new ObjectInputStream(new FileInputStream( "haoguicai000.txt "));
students2 = (Student[])ois.readObject();

for(Student s :students2)
{
System.out.println( "姓名: "+s.getName());
System.out.println( "年龄: "+s.getAge());
System.out.println( "性别 "+s.getSex());
}
}
catch(FileNotFoundException ex)
{
ex.printStackTrace();
}
catch(IOException ex)
{
ex.printStackTrace();
}
catch(ClassNotFoundException ex)
{
ex.printStackTrace();
}
}
}