解决循环操作ObjectInputStream的readObject()方法的EOF异常

来源：互联网发布：plc编程实例详解编辑：程序博客网时间：2024/05/22 12:34

Code:

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.io.Serializable;

public class ObjectStream {
    public static void main(String[] args) {
        ObjectOutputStream oos = null;
        ObjectInputStream ois = null;
        Person pe = null;
        try {
            FileOutputStream out = new FileOutputStream("D:/obj.txt");
            oos = new ObjectOutputStream(out);
            Person per = new Person("微软", 14);
            pe = new Person("金山", 20);
            oos.writeObject(per);
            oos.writeObject(pe);
            oos.writeObject(null);//解决EOF的关键，加入一个空的对象
            System.out.println("添加成功");
            oos.close();
            out.close();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }

        try{
            FileInputStream in = new FileInputStream("D:/obj.txt");
            ois = new ObjectInputStream(in);
            Object obj=null;
            while((obj=ois.readObject())!=null) {
                Person s = (Person)obj;
                System.out.println(s);
            }
            ois.close();
            in.close();
        } catch(Exception e) {
            e.printStackTrace();
        }
    }
}

class Person implements Serializable {
    private String name;
    private int age;

    public Person(String name, int age) {
        this.name = name;
        this.age = age;
    }

    public String getNmae(){
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }

    public String toString() {
        return "姓名：" + name + "  性别:" + age;
    }

}

大家看标记红色的那行，在这里追加了一个空对象，因为在循环读取对象时，正确读取了两个对象之后，还会在读一次，此时已经没有东西可读，就会抛出EOF错误，判断条件是不等于空，那我们自己就在文件的后面追加一个空对象不就解决了？

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