Serializable與transient的聯合使用：動態管理成員屬性——《Thinking in Java》隨筆033

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 1 //: SerialCtl.java 2 // 下面這個Demo示範如何使用Serializable和transient關鍵字來動態管理成員屬性 3 // 主要思想是添加（不是複寫與實現）write與read的方法（注意方法簽名） 4  5 package c10; 6  7 import java.io.ByteArrayInputStream; 8 import java.io.ByteArrayOutputStream; 9 import java.io.IOException;10 import java.io.ObjectInputStream;11 import java.io.ObjectOutputStream;12 import java.io.Serializable;13 14 /**15 *    @time:         上午10:01:5316 *    @date:         2017年5月11日17 *    @auther:    skyfffire18 *    @version:    v0.119 */20 public class SerialCtl implements Serializable {21     private static final long serialVersionUID = -7532371062424412783L;22 23     String a = null;24     transient String b = null;25     26     public SerialCtl(String aa, String bb) {27         a = "Not Transient: " + aa;28         b = "Transient: " + bb;29     }30     31     public String toString() {32         return a + "\n" + b;33     }34     35     private void writeObject(ObjectOutputStream stream) 36             throws IOException {37         stream.defaultWriteObject();38         stream.writeObject(b);39     }40     41     private void readObject(ObjectInputStream stream) 42             throws IOException, ClassNotFoundException {43         stream.defaultReadObject();44         b = (String) stream.readObject();45     }46     47     public static void main(String[] args) {48         SerialCtl sc = new SerialCtl("Test1", "Test2");49         50         System.out.println("Before:\n" + sc);51         52         ByteArrayOutputStream buf = 53                 new ByteArrayOutputStream();54 55         try {56             ObjectOutputStream o = new ObjectOutputStream(buf);57             o.writeObject(sc);58             o.close();59             60             ObjectInputStream in = 61                     new ObjectInputStream(62                             new ByteArrayInputStream(buf.toByteArray()));63             sc = (SerialCtl) in.readObject();64             in.close();65             System.out.println(sc);66         } catch (Exception e) {67             e.printStackTrace();68         }69     }70 }71 72 ///:~

 

Serializable與transient的聯合使用：動態管理成員屬性——《Thinking in Java》隨筆033