写多个可加化物体的对象状态。 [英] write mutiple object states of serilizable object.
问题描述
我可以在一个文件中写出可序列化的多个对象状态吗？
如果可以的话我怎样才能读回这些状态？
i有在文件中写入多个对象状态没问题。
但是我无法读回所有对象，说明我到目前为止所保存的内容。
only读回第一个状态然后抛出 StreamCorruptedException 异常。
i知道这是由于文件中的数据不一致。
所以PLZ帮帮我。
问候。
can i write multiple object states of a serializable in a single file?
if i can then how can i read back those states?
i have no problem with writing multiple object states in a file.
but i can''t read back the all object states what i saved so far.
only after reading back the first state then StreamCorruptedException exception thrown.
i know it is due to data inconsistency in the file.
so plz help me.
Regards.
推荐答案
我可以写吗单个文件中可序列化的多个对象状态？
如果可以的话我怎样才能读回这些状态？
i写入多个对象没有问题文件中的状态。
但是我无法读回所有对象，说明我到目前为止所保存的内容。
只有在读回第一个州之后然后 StreamCorru ptedException 异常抛出。
i知道这是由于文件中的数据不一致。
所以请帮助我。
问候。
can i write multiple object states of a serializable in a single file?
if i can then how can i read back those states?
i have no problem with writing multiple object states in a file.
but i can''t read back the all object states what i saved so far.
only after reading back the first state then StreamCorruptedException exception thrown.
i know it is due to data inconsistency in the file.
so plz help me.
Regards.
我们可以看到代码。
Can we see the codes.
我可以写多个对象单个文件中可序列化的状态？
如果可以的话我怎样才能读回这些状态？
i在编写多个对象状态时没有问题一个文件。
但是我无法读回所有对象，说明我到目前为止所保存的内容。
只有在读回第一个状态后才< b> StreamCorruptedException 异常抛出。
i知道这是由于文件中的数据不一致。
所以请帮助我。
问候。
can i write multiple object states of a serializable in a single file?
if i can then how can i read back those states?
i have no problem with writing multiple object states in a file.
but i can''t read back the all object states what i saved so far.
only after reading back the first state then StreamCorruptedException exception thrown.
i know it is due to data inconsistency in the file.
so plz help me.
Regards.
除非你重置ObjectOutputStream或writeUnshared（），否则每个对象只会被写入这样一个流的
。以下每次尝试编写对象
时，只会对以前序列化的化身的引用写入流中。
亲切的问候，
Jos
Unless you reset the ObjectOutputStream or writeUnshared() every object is
written to such a stream only once. Every following attempt to write the object
only a reference to a previously serialized incarnation is written to the stream.
kind regards,
Jos
实际上这个Q.是由我代表AKB发送的。所以我发送源代码。
按照 ro35198x 要求的关注...
我的代码是这样的......
actually this Q. is sent by me on behalf of AKB. so i send u the source code.
as per as ro35198x requirements concern ...
my code is something like this .....
//这是我要序列化的SERIALIZABLE类。
class s实现了Serailizable
{
private int a，b;
public s（int A，int B）{a = A; b = B;}
public void display（）{
System.out.println（" DMJ：" + a +" \t" ; + b）;
}
}
//这是我的主要班级
class m
{
public static void main（String args []）
{
FileOutputStream o = new FileOutputStream（file_name，true）;
//以追加模式打开的文件
ObjectOutputStream out = new ObjectOutputStream（o）;
out.writeObject（new s（100,200） ）;
out.writeObject（new s（300,400））;
FileInputStream i = new FileInputStream（file_name）;
ObjectInputStream in = new ObjectInputStream（i）;
（（s）in.readObject（））。display（）; //这没关系......它显示我保存的第一个状态。
（（s）in.readObject（））。display（）;
//第二个电话是抛出StreamCorruptedException。
}
}
//this is my SERIALIZABLE class which is to be serialized.
class s implements Serailizable
{
private int a ,b;
public s(int A,int B){a=A;b=B;}
public void display(){
System.out.println("DMJ: " + a + "\t" + b);
}
}
//this is my main class
class m
{
public static void main(String args[])
{
FileOutputStream o = new FileOutputStream(file_name,true);
//the file opened in append mode
ObjectOutputStream out = new ObjectOutputStream(o);
out.writeObject(new s(100,200));
out.writeObject(new s(300,400));
FileInputStream i = new FileInputStream(file_name);
ObjectInputStream in = new ObjectInputStream(i);
((s)in.readObject()).display(); //this is OK ... it shows the first state i saved.
((s)in.readObject()).display();
//the second call is throwing StreamCorruptedException.
}
}
plz help。
亲切的问候。
plz help.
kind regards.
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