Question

Java 怎样将多个对象读取出来？怎样判断是否读完？

Answer 1

Java 将多个对象读取出来按以下方法进行：

public class SerializableTest1

{

/**

* 保存为一个二进制的文件

*/

public static void main(String[] args) throws Exception

{

Person p1 = new Person(20,"张三",33.4);

Person p2 = new Person(50,"李四",53.4);

Person p3 = new Person(10,"王五",123.4);

//存入序列化的对象

FileOutputStream fos = new FileOutputStream("person.txt");

ObjectOutputStream oos = new ObjectOutputStream(fos);

oos.writeObject(p1);

oos.writeObject(p2);

oos.writeObject(p3);

oos.close();

///////////////////////////////////////////////////////

//取出序列化的对象

FileInputStream fn = new FileInputStream("person.txt");

ObjectInputStream ois = new ObjectInputStream(fn);

while(fn.available() > 0)    //代表文件中还有内容

{

Person p = (Person)ois.readObject();

System.out.println(p);