java 类的序列化_学Java· 对象序列化· Java终章
对象序列化
序列化：把Java对象转换成字节序列的过程
反序列化:把字节序列恢复成Java对象的过程
步骤：
1.创建一个类，继承Serializable
2.创建对象
3.将对象写入文件
4.从文件读取对象信息
对象的读写涉及两个类：
对象输入流ObjectInputStream
对象输出流ObjectOutputStream
实战
写一个商品类，将类的信息保存在文件中，并从文件中读取
public class Goods implements Serializable {
private String goodsId;
private String goodsName;
private double price;
public Goods(String goodsId, String goodsName, double price) {
super();
this.goodsId = goodsId;
this.goodsName = goodsName;
this.price = price;
}
public String getGoodsId() {
return goodsId;
}
public void setGoodsId(String goodsId) {
this.goodsId = goodsId;
}
public String getGoodsName() {
return goodsName;
}
public void setGoodsName(String goodsName) {
this.goodsName = goodsName;
}
public double getPrice() {
return price;
}
public void setPrice(double price) {
this.price = price;
}
@Override
public String toString() {
return “商品信息 [编号：” + goodsId + “, 名称：” + goodsName + “, 价格：” + price + “]“;
}
}
import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException;import java.io.ObjectInputStream;import java.io.ObjectOutputStream;public class Test \{public static void main(String\[\] args) \{// 定义Goods类对象Goods goods1 = new Goods("gd001", "电脑", 4000);try \{// 输出流FileOutputStream fos = new FileOutputStream("C:\\\\test\\\\goods.txt");ObjectOutputStream oos = new ObjectOutputStream(fos);// 输入流FileInputStream fis = new FileInputStream("C:\\\\test\\\\goods.txt");ObjectInputStream ois = new ObjectInputStream(fis);// 将Goods对象信息写入文件oos.writeObject(goods1);oos.writeBoolean(true);// 写入一个布尔类型的数据oos.flush();// 将文件的内容读取到控制台try \{Goods rgoods1 = (Goods) ois.readObject();System.out.println(rgoods1);\} catch (ClassNotFoundException e) \{// TODO Auto-generated catch blocke.printStackTrace();\}System.out.println(ois.readBoolean());// 注意读写顺序，否则报EOF错误fos.close();oos.close();fis.close();ois.close();\} catch (FileNotFoundException e) \{// TODO Auto-generated catch blocke.printStackTrace();\} catch (IOException e) \{// TODO: handle exception\}\}\}
商品信息 [编号：gd001, 名称：电脑, 价格：4000.0]
true
谁借莪１个温暖的怀抱￠
亦凉
傷城~
还没有评论，来说两句吧...