对象流的读入与写出

对象流的读入与写出的简单应用

需要注意的事情：

1.用对象流写的对象必须要实现Serializable接口----贴标签技术

2.对象流的读取必须采用捕捉异常的方式控制结束，不能采用available()>0

import java.io.EOFException;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOException;import java.io.ObjectInputStream;import java.io.ObjectOutputStream;import java.io.Serializable;import org.junit.Test;public class ObjectStrean {@Testpublic void testObjWrite() {ObjectOutputStream out = null;try {// 后序可以随便out = new ObjectOutputStream(new FileOutputStream("E:/test/person.ppp"));for (int i = 0; i < 5; i++) {Person person = new Person("nn" + i, 10 + i);out.writeObject(person);}} catch (IOException e) {e.printStackTrace();} finally {if (out != null) {try {out.close();} catch (IOException e) {e.printStackTrace();}}}}@Testpublic void testIn() {ObjectInputStream in = null;try {in = new ObjectInputStream(new FileInputStream("E:/test/person.ppp"));// while(in.available()>0){//读取对象流不能使用availablewhile (true) {Person person = (Person) in.readObject();System.out.println(person);}} catch (EOFException e) {System.out.println("Over!");} catch (IOException e) {e.printStackTrace();} catch (ClassNotFoundException e) {e.printStackTrace();}}}// 对象流的读取对象必须实现序列化接口class Person implements Serializable {private static final long serialVersionUID = 1L;String name;int age;public Person(String name, int age) {super();this.name = name;this.age = age;}public Person() {super();}public String getName() {return name;}public void setName(String name) {this.name = name;}public int getAge() {return age;}public void setAge(int age) {this.age = age;}@Overridepublic String toString() {return name + "," + age;}}