How to serialize and deserialise list of objects in Java? [duplicate]

Question

I have a List<Animal> that i want to send as a SOAP response to the client but the send method requires byte[] and deserialize in the client.

Can anyone tell me how to convert my List<Animal> to byte[] and convert the byte[] back to the List<Animal>.

I know there is lots of questions like this in this site, but I am confuse with the answers. I tried a lot of them but none of the worked for me.

I tried that. It only works for a single object or objects, but not foe nested objects like List<Animal> — user1036645
– user1036645, Commented Apr 8, 2015 at 3:03
Again I tried the code you suggested. It throws java.lang.ClassCastException: [B cannot be cast to java.util.List — user1036645
– user1036645, Commented Apr 8, 2015 at 3:11

Evgeniy Dorofeev · Accepted Answer · 2015-04-08 04:03:45Z

2

It depends on Animal. If it is Serializable you can use Java Serialization mechanizm https://docs.oracle.com/javase/tutorial/jndi/objects/serial.html.

answered Apr 8, 2015 at 4:03

Evgeniy Dorofeev

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Thomas Zhang · Accepted Answer · 2015-04-08 06:35:49Z

0

public static byte[] objectToByteArray(Object obj) throws Exception {
    byte[] bytes = null;
    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    ObjectOutputStream oos = new ObjectOutputStream(baos);
    oos.writeObject(obj);
    bytes = baos.toByteArray();
    oos.close();
    return bytes;
}

public static Object byteArrayToObject(byte[] buffer) throws Exception {
    Object ob = null;
    ObjectInputStream ois = new ObjectInputStream(new ByteArrayInputStream(
            buffer));
    ob = ois.readObject();
    ois.close();
    return ob;
}

edited Apr 8, 2015 at 6:35

answered Apr 8, 2015 at 3:35

Thomas Zhang

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2 Comments

Kumar Over a year ago

You have to explain about your code for better understanding.

user207421 Over a year ago

baos.close() is redundant here.

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