Java反序列化测试

前言：有没有想过，如何将对象进行“加密”后写入磁盘？序列化帮你实现！

1.概念

序列化 (Serialization)将对象的状态信息转换为可以存储或传输的形式的过程。在序列化期间，对象将其当前状态写入到临时或持久性存储区。以后，可以通过从存储区中读取或反序列化对象的状态，重新创建该对象.

2.反序列化Java实验

--测试的实体类--

package exercise;

import java.io.Serializable;

public class Person implements Serializable{
    private String name;
    private int age;
    
    public Person() {
    }

    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;
    }

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

1)单对象序列化

package exercise;

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.util.ArrayList;
import java.util.List;


public class ObjectStreamDemo1 {
    /**
     * @param args
     * @throws IOException
     * @throws ClassNotFoundException
     */
    
    public final static String PATH = "obj.object1";
    
    
    public static void main(String[] args) throws IOException,
            ClassNotFoundException {
        //writeObj();
        readObj();
        System.out.println("--End--");
    }

    public static void readObj() throws IOException, ClassNotFoundException {
        ObjectInputStream ois = new ObjectInputStream(new FileInputStream(
                PATH));
        
        
        Person p  = (Person)ois.readObject();
        System.out.println(p.getName() + "|" + p.getAge());
        
    }

    public static void writeObj() throws IOException {
        ObjectOutputStream oos = new ObjectOutputStream(new FileOutputStream(
                PATH));

        oos.writeObject(new Person("张三", 30));
        oos.close();
    }
}

结果显示

2)多对象序列化

package exercise;

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.util.ArrayList;
import java.util.List;


public class ObjectStreamDemo2 {
    /**
     * @param args
     * @throws IOException
     * @throws ClassNotFoundException
     */
    public final static String PATH = "obj.object";
    public static void main(String[] args) throws IOException,
            ClassNotFoundException {
        
        //writeObj();
        readObj();
        System.out.println("---end!---");
    }

    public static void readObj() throws IOException, ClassNotFoundException {
        ObjectInputStream ois = new ObjectInputStream(new FileInputStream(
                PATH));
        
        List<Person> persons  = (List<Person>)ois.readObject();
        for(Person p:persons){
            System.out.println(p.getName() + "|" + p.getAge());
        }
    }

    public static void writeObj() throws IOException {
        ObjectOutputStream oos = new ObjectOutputStream(new FileOutputStream(
                PATH));
        
        List<Person> persons = new ArrayList<Person>();
        Person p1 = new Person("张三",18); 
        Person p2 = new Person("李四",19); 
        persons.add(p1);
        persons.add(p2);
        oos.writeObject(persons);
        oos.close();
    }
}

结果显示

注意：

·实体类必须实现序列化接口“java.io.Serializable”

·生成的obj.object 因为是二进制文件，故无法正常打开，若notepad打开也是乱码！

总结：序列化技术在web端技术的应用相当重要，希望学习Java的朋友都能理解该技术并进行应用。