retrive serialize files data ERROR

first i serialize my file using this code .it works

then i try to retrive data using following code .But it didn't working

<jsp:useBean id="ana" type="my.Mybean" beanName="WEB-INF/classes/aruna.ser" scope="session">

You got to un-serialize back to object before you can use it.

Check out some tutorial on Serialization before trying non-meaningful things

how to retrive the details from this file

What does ObjectInputStream readObject() returns ?

I also have same problem.for which to assign the oos.readObject();
some tutorials says use this

PersistentTime p=oos.readObject();
but it is not working

PersistentTime is user defined class in the example and it is just an example. Cast the returned Object to your Class object.

thanks Balu.Now it works

can we do the same deserilization process using useBean properties?
if yes tell me please?

cain i use

<jsp:useBean id="xxxxxxxxxxx"
type="yyyyyyyyyyyyyyy"
beanName="zzzzzzzzzzzzzzzzzz"
scope="session" />

to deserialized the object.

jsp:useBean defines a bean in the specified scope and which can be used later. It does not relate to Serialization at all. You got to serialize and deseriliaze using the same ObjectInputStream and ObjectOutputStream only.

in some book i found that beanName property of

<jsp:useBean id="xxxxxxxxxxx"
type="yyyyyyyyyyyyyyy"
beanName="zzzzzzzzzzzzzzzzzz"
scope="session" />

use for serilize the object;

"
The beanName attribute specifies the name of a bean as expected by the instantiate()
method of the java.beans.Beans class. For this reason, beanName can
refer either to a serialized bean or to the name of a class whose instance is to be created.
"

Aruna,

Oh yeah.. i got it here in the specification too.

beanName="{package.class | <%= expression %>}" type="package.class"

Instantiates a Bean from either a class or a serialized template, using the java.beans.Beans.instantiate method, and gives the Bean the type specified in type. The Beans.instantiate method checks whether a name represents a class or a serialized template. If the Bean is serialized, Beans.instantiate reads the serialized form (with a name like package.class.ser) using a class loader. For more information, see the JavaBeans API Specification.

So it should work with "package.class.ser" , in your case it is my.Mybean.ser. try this.

I change the code as below.
but it prints null

null , No error ?

Ok is it not yourfilename.ser ? only ser file name.