对象的序列化,需要实现Serializable 接口

用对象流实现对象的序列化和反序列化

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;


/**
 * 将Person 的对象 person系列化到file [person.txt]文件中
 * 
 * @author Administrator
 *
 */
public class TestSerializable {


public static void main(String[] args) {


// 序列化对象


File file = new File("person.txt");


// 创建待序列化的Person对象
Person person = new Person("zhangsan", 22);


// 声明一个对象输出流 objectOutputStream
ObjectOutputStream objectOutputStream = null;


try {
// 初始化对象输出流
objectOutputStream = new ObjectOutputStream(new FileOutputStream(file));
} catch (FileNotFoundException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}


try {
objectOutputStream.writeObject(person);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} finally {
if (objectOutputStream != null) {
try {
// 刷新对象流
objectOutputStream.flush();
// 关闭对象流
objectOutputStream.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}


// 反序列化


// 声明一个对象输入流
ObjectInputStream objectInputStream = null;
try {
// 初始化对象输入流对象
objectInputStream = new ObjectInputStream(new FileInputStream(file));
// 用objectInputStream从文件file中读取一个Object;
Object object = objectInputStream.readObject();
// 判断类型是否是自己想要的类型
if (object instanceof Person) {
Person p = (Person) object;
System.out.println(p);
}
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} finally {
// 最后关闭流
if (objectInputStream != null) {
try {
objectInputStream.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}


}

}

import java.io.Serializable;


/**
 * Person类
 * @author Administrator
 *被序列化的对象的类一定要实现 Serializable 接口
 */
public class Person implements Serializable{
/**
* 
*/
private static final long serialVersionUID = 1L;
public String name;
public Integer age;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Integer getAge() {
return age;
}
public void setAge(Integer age) {
this.age = age;
}
public Person(String name, Integer age) {
this.name = name;
this.age = age;
}
Person() {
super();
}
@Override
public String toString() {
return "Person [name=" + name + ", age=" + age + "]";
}


}