Object流
一.object流
1 import java.io.FileInputStream; 2 import java.io.FileNotFoundException; 3 import java.io.FileOutputStream; 4 import java.io.IOException; 5 import java.io.ObjectInputStream; 6 import java.io.ObjectOutputStream; 7 import java.io.Serializable; 8 /** 9 * 一.Object流 10 * ObjectOutputStream流/ObjectInputStream流 11 * 二.补充Externalizable(可外部化的)接口 12 * 作用:手动控制 序列可视化 13 * @Override 14 public void writeExternal(ObjectOutput out) throws IOException { 15 } 16 17 @Override 18 public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException { 19 } 20 * @author 罗摩衔那 21 * 22 */ 23 public class TestObjectIO { 24 public static void main(String[] args) throws ClassNotFoundException { 25 T t=new T(); 26 t.k=8; 27 try {//确定输出文件 28 FileOutputStream fos=new FileOutputStream("C:/Users/罗摩衔那/Desktop/Object.txt"); 29 //给输出流套上ObjectOutputStream管道 30 ObjectOutputStream oos=new ObjectOutputStream(fos); 31 //将指定的对象写入ObjectOutputStream 32 oos.writeObject(t); 33 oos.flush(); 34 oos.close();//关闭流 35 //从输出文件中读取信息 36 FileInputStream fis=new FileInputStream("C:/Users/罗摩衔那/Desktop/Object.txt"); 37 //写入流上套上ObjectInputStream管道 38 ObjectInputStream ois=new ObjectInputStream(fis); 39 //从ObjectInputStream读取一个对象 40 T tReaded=(T) ois.readObject(); 41 System.out.println(tReaded.i+" "+tReaded.j+" "+tReaded.d+" "+tReaded.k); 42 } catch (IOException e) { 43 44 e.printStackTrace(); 45 } 46 } 47 } 48 /* 49 * serializable(序列化)标记此类可序列化 50 */ 51 class T implements Serializable 52 { 53 int i=0; 54 int j=9; 55 double d=2.3; 56 //透明 57 transient int k=0; 58 }
