Hashtable serialization

Question

Hi, i've a problem with the deserialization of my hashtable...
Here are my serialization and deserialization functions:
String serializeParameters(Hashtable parameters) throws IOException {
try
ByteArrayOutputStream baos = new ByteArrayOutputStream();
ObjectOutputStream outputToString = new ObjectOutputStream(baos);
outputToString.writeObject(parameters);
outputToString.close();
return new String(baos.toByteArray());
catch (Exception ex)
return null;
Hashtable deserializeParameters(String serializedParameters) throws
IOException, ClassNotFoundException {
try{
byte baSend[]=new byte[serializedParameters.length()];
baSend = serializedParameters.getBytes();
ByteArrayInputStream bais = new ByteArrayInputStream(baSend);
ObjectInputStream ois = new ObjectInputStream(bais);
return (Hashtable) ois.readObject();
catch (Exception ex)
The deserialization function catch an ugly
java.io.StreamCorruptedException: invalid stream header
when trying "ObjectInputStream ois = new ObjectInputStream(bais);"
Is there anything wrong in my code? (Of course there is! It is not working!! ;) )
If anyone can help me, thanks by advance!

Answer 1

You cannot assume that you can validly create a String from an arbitrary array of bytes.The String constructor specially mentions this point. Consequently, the transformation from byte array to Strring and back to byte array will not in general produce the same byte array for arbitrary byte array data.
So the fact that the resuling stream is corrupted is not in the least bit surprising.
Sylvia.