How to serialize and deserialise list of objects in Java?

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 — user1036645, Apr 08 '15 at 03:03
Again I tried the code you suggested. It throws java.lang.ClassCastException: [B cannot be cast to java.util.List — user1036645, Apr 08 '15 at 03:11

score 2 · Answer 1 · answered Apr 08 '15 at 04:03

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 08 '15 at 04:03

Evgeniy Dorofeev

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Thomas Zhang · Accepted Answer · 2015-04-08T06:35:49.647

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 08 '15 at 06:35

answered Apr 08 '15 at 03:35

Thomas Zhang

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2
8

2

You have to explain about your code for better understanding. – Kumar Apr 08 '15 at 03:43
`baos.close()` is redundant here. – user207421 Apr 08 '15 at 04:55

How to serialize and deserialise list of objects in Java?

2 Answers2