java序列化与反序列化操作实例分析_JAVA教程

java序列化与反序列化操作实例分析

2020-06-27 14:48Wallace JAVA教程

这篇文章主要介绍了java序列化与反序列化操作,结合实例形式分析了java序列化与反序列化的概念与具体实现技巧,需要的朋友可以参考下

本文实例分析了java 序列化与反序列化操作。分享给大家供大家参考，具体如下：

概述：

Java序列化是指把Java对象转换为字节序列的过程;而Java反序列化是指把字节序列恢复为Java对象的过程。

示例代码：

									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;

									import java.util.ArrayList;

									import java.util.Date;

									import java.util.HashMap;

									import java.util.List;

									public class Test {

									  /**

									   * @param args

									   */

									  public static void main(String[] args) {

									    try {

									      ObjectOutputStream out = new ObjectOutputStream(new FileOutputStream("D:/objectFile.obj"));

									      Customer customer = new Customer("中国人",23);

									      out.writeObject("你好!");

									      out.writeObject(new Date());

									      out.writeObject(customer);

									      out.writeInt(123);

									      List list = new ArrayList();

									      int i =0 ;

									      while(i<100) {

									        Customer customer2 = new Customer("中国人",i);

									        list.add(customer2);

									        i++;

									      }

									      HashMap hashMap = new HashMap();

									      hashMap.put("customer", list);

									      out.writeObject(hashMap);

									      out.close();

									      ObjectInputStream in = new ObjectInputStream(new FileInputStream("D:/objectFile.obj"));

									      System.out.println("obj1= " + (String) in.readObject());

									      System.out.println("obj2= " + (Date) in.readObject());

									      Customer obj3 = (Customer) in.readObject();

									      System.out.println("obj3= " + obj3);

									      int obj4 = in.readInt();

									      System.out.println("obj4= " + obj4);

									      Object obj5 = in.readObject();

									      System.out.println(obj5);

									      HashMap hash_map = (HashMap)obj5;

									      List l = (List) hash_map.get("customer");

									      System.out.println("size: " + l.size());

									      for(int ii=0; ii<l.size() -1 ; ii++) {

									        Customer c = (Customer)l.get(ii);

									        System.out.println(c.getName());

									        System.out.println(c.getAge());

									      }

									      in.close();

									    } catch (FileNotFoundException e) {

									      e.printStackTrace();

									    } catch (IOException e) {

									      e.printStackTrace();

									    } catch (ClassNotFoundException e) {

									      e.printStackTrace();

									    }

									  }

									}

									class Customer implements Serializable {

									  private static final long serialVersionUID = 1L;

									  private String name;

									  private int age;

									  public String getName() {

									    return name;

									  }

									  public int getAge() {

									    return age;

									  }

									  public Customer(String name, int age) {

									    this.name = name;

									    this.age = age;

									  }

									  public String toString() {

									    return "name=" + name + ", age=" + age;

									  }

									}