写入
获取ObjectOutputStream对象,new出来,构造参数:FileOutputStream对象目标文件
调用ObjectOutputStream对象的writeObject()方法,参数:要保存的对象
调用ObjectOutputStream对象的close()方法,关闭流
此时会报异常,NotSerialzeableException,是因为目标类没有实现Serializable接口,这个接口没有方法,称为标记接口,会在改变类之后,生成新的序列号,保存的文件读取时会显示错误信息InvalidClassException
读取
获取ObjectInputStream对象,new出来,构造参数:FileInputStream对象目标文件
调用ObjectInputStream对象的readObject()方法,得到保存的数据
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 ObjectStreamDemo { /** * @param args * @throws Exception */ public static void main(String[] args) throws Exception { writeObj(); readObj(); } /** * 保存对象 * @throws IOException * @throws FileNotFoundException */ public static void writeObj() throws Exception{ ObjectOutputStream oos=new ObjectOutputStream(new FileOutputStream("person.object")); oos.writeObject(new Person("taoshihan",100)); } public static void readObj() throws Exception{ ObjectInputStream ois=new ObjectInputStream(new FileInputStream("person.object")); Person person=(Person) ois.readObject(); System.out.println(person);//输出 taoshihan:100 } } /** * 自定义的类 * @author taoshihan * */ class Person implements Serializable{ private String name; private int age; public Person(String name,int age) { this.name=name; this.age=age; } @Override public String toString() { // TODO Auto-generated method stub return name+":"+age; } }
PHP版:
<?php class Person{ private $name; private $age; public function __construct($name,$age){ $this->name=$name; $this->age=$age; } public function toString(){ return $this->name.":".$this->age; } } $personObj=serialize(new Person("taoshihan",100)); echo $personObj;// 输出 O:6:"Person":2:{s:12:"Personname";s:9:"taoshihan";s:11:"Personage";i:100;} $obj=unserialize($personObj); echo $obj->toString();//输出 taoshihan:100
原创文章,作者:奋斗,如若转载,请注明出处:https://blog.ytso.com/12655.html