java 序列化之当序列化遭遇继承,组合，对象引用
public class Serial extends SerializableEr implements Serializable{ private static final Logger LOG = Logger.getLogger(Serial.class); int id;String name;private static final Test test =new Test();public Serial(int id, String name) {this.id = id;this.name = name;}public String toString() {return "DATA: " + id + " " +name+super.test;}public static void main(String[] args) throws Exception{ Serial serial=new Serial(1,"4234"); System.out.println("object serial:"+serial); try{ FileOutputStream fos=new FileOutputStream("serialTest.txt"); ObjectOutputStream oos=new ObjectOutputStream(fos); oos.writeObject(serial); oos.flush(); oos.close(); }catch(Exception e){ System.out.println("Exception:"+e); } a(); } public static void a()throws Exception{ FileInputStream fos=new FileInputStream("serialTest.txt"); ObjectInputStream oos=new ObjectInputStream(fos); Object o= oos.readObject(); System.out.println(o); }?
public class Test { }?
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public class SerializableEr { Test test =new Test(); // public SerializableEr(){};}?
运行结果：object serial:DATA: 1 4234ser.Test@9971ad
DATA: 1 4234ser.Test@1bf6770
当把? Serial? 改为 private static final Test test =new Test();
public class Serial extends SerializableEr implements Serializable{ private static final Logger LOG = Logger.getLogger(Serial.class); int id;String name;/*private static final*/ Test test =new Test();public Serial(int id, String name) {this.id = id;this.name = name;}public String toString() {return "DATA: " + id + " " +name+super.test;}public static void main(String[] args) throws Exception{ Serial serial=new Serial(1,"4234"); System.out.println("object serial:"+serial); try{ FileOutputStream fos=new FileOutputStream("serialTest.txt"); ObjectOutputStream oos=new ObjectOutputStream(fos); oos.writeObject(serial); oos.flush(); oos.close(); }catch(Exception e){ System.out.println("Exception:"+e); } a(); } public static void a()throws Exception{ FileInputStream fos=new FileInputStream("serialTest.txt"); ObjectInputStream oos=new ObjectInputStream(fos); Object o= oos.readObject(); System.out.println(o); }}???
object serial:DATA: 1 4234ser.Test@9971adException:java.io.NotSerializableException: ser.TestException in thread "main" java.io.WriteAbortedException: writing aborted; java.io.NotSerializableException: ser.Testat java.io.ObjectInputStream.readObject0(Unknown Source)at java.io.ObjectInputStream.defaultReadFields(Unknown Source)at java.io.ObjectInputStream.readSerialData(Unknown Source)at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)at java.io.ObjectInputStream.readObject0(Unknown Source)at java.io.ObjectInputStream.readObject(Unknown Source)at ser.Serial.a(Serial.java:40)at ser.Serial.main(Serial.java:35)Caused by: java.io.NotSerializableException: ser.Testat java.io.ObjectOutputStream.writeObject0(Unknown Source)at java.io.ObjectOutputStream.defaultWriteFields(Unknown Source)at java.io.ObjectOutputStream.writeSerialData(Unknown Source)at java.io.ObjectOutputStream.writeOrdinaryObject(Unknown Source)at java.io.ObjectOutputStream.writeObject0(Unknown Source)at java.io.ObjectOutputStream.writeObject(Unknown Source)at ser.Serial.main(Serial.java:29)
?总结：
? 事实证明。
?1：java的序列化时 。只是序列化jvm堆上的对象以及属性对象，，像静态变量就可以不实现序列化接口，因为静态变量在存在与方法区的，
场景2：
public class Serial extends SerializableEr { private static final Logger LOG = Logger.getLogger(Serial.class); int id;String name;private static final Test test =new Test();public Serial(int id, String name) {this.id = id;this.name = name;}public String toString() {return "DATA: " + id + " " +name+super.test;}public static void main(String[] args) throws Exception{ Serial serial=new Serial(1,"4234"); System.out.println("object serial:"+serial); try{ FileOutputStream fos=new FileOutputStream("serialTest.txt"); ObjectOutputStream oos=new ObjectOutputStream(fos); oos.writeObject(serial); oos.flush(); oos.close(); }catch(Exception e){ System.out.println("Exception:"+e); } a(); } public static void a()throws Exception{ FileInputStream fos=new FileInputStream("serialTest.txt"); ObjectInputStream oos=new ObjectInputStream(fos); Object o= oos.readObject(); System.out.println(o); }}?
public class SerializableEr implements Serializable{ Test test =new Test(); // public SerializableEr(){};}? 结果：
object serial:DATA: 1 4234ser.Test@9971adException:java.io.NotSerializableException: ser.TestException in thread "main" java.io.WriteAbortedException: writing aborted; java.io.NotSerializableException: ser.Testat java.io.ObjectInputStream.readObject0(Unknown Source)at java.io.ObjectInputStream.defaultReadFields(Unknown Source)at java.io.ObjectInputStream.readSerialData(Unknown Source)at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)at java.io.ObjectInputStream.readObject0(Unknown Source)at java.io.ObjectInputStream.readObject(Unknown Source)at ser.Serial.a(Serial.java:40)at ser.Serial.main(Serial.java:35)Caused by: java.io.NotSerializableException: ser.Testat java.io.ObjectOutputStream.writeObject0(Unknown Source)at java.io.ObjectOutputStream.defaultWriteFields(Unknown Source)at java.io.ObjectOutputStream.writeSerialData(Unknown Source)at java.io.ObjectOutputStream.writeOrdinaryObject(Unknown Source)at java.io.ObjectOutputStream.writeObject0(Unknown Source)at java.io.ObjectOutputStream.writeObject(Unknown Source)at ser.Serial.main(Serial.java:29)
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?2：java的序列化时 。当子类实现了序列化接口时，就只序列化子类，及属性，当子类没有实现序列化接口时，就要序列化子类，同时还要序列化实现了序列化接口的父类及属性，
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