Serializing/Deserializing Objects..Urgent !!!

Question

Hello Everyone,
Out of the blue I got an exception like
java.io.StreamCorruptedException: invalid stream header
     at java.io.ObjectInputStream.readStreamHeader(Unknown Source)
     at java.io.ObjectInputStream.<init>(Unknown Source)
I am implementing "Applet to Servlet communication".
Actually i am trying to deserialize the object which was passed to the servlet.But when i read it back i am geting the above exception.
Can anyone throw some light on it?
Her is my code
APPLET CODE:
private void interactWithServlet() {
WBObject result = null;
try {
// Create an object we can use to communicate with the servlet
URL servletURL = new URL(sURL);
URLConnection servletConnection = servletURL.openConnection();
servletConnection.setDoOutput(true);
servletConnection.setUseCaches(false);
servletConnection.setRequestProperty("Content-Type", "application/octet-stream;charset=utf-8");
ObjectOutputStream request = new ObjectOutputStream(
new BufferedOutputStream(servletConnection.getOutputStream()));
WBObject wbObj=m_whiteBoardComponent.getDesignPanel().getWBObject();
int size=wbObj.getChildren().size();
for(int i=0;i<size;i++){
PickObject pick=(PickObject)wbObj.getChildren().get(i);
System.out.println("the pick object name is"+pick.getName());
int count=pick.getChildren().size();
for(int j=0;j<count;j++){
ItemObject item=(ItemObject)pick.getChildren().get(j);
System.out.println("the item object name is"+item.getName());
request.writeObject(wbObj);
request.flush();
request.close();
ObjectInputStream response = new ObjectInputStream(
new BufferedInputStream(servletConnection.getInputStream()));
result = (WBObject)response.readObject();
System.out.println("The object is"+(result instanceof WBObject));
response.close();
} catch (Exception e) {
e.printStackTrace();
SERVLET CODE:
public void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException,
IOException {
WBObject o = null;
ObjectInputStream inputStream = new ObjectInputStream(
new BufferedInputStream(req.getInputStream()));
try {
o = (WBObject)inputStream.readObject();
inputStream.close();
} catch( ClassNotFoundException ex ) {
ex.printStackTrace();
// send response
resp.setStatus(HttpServletResponse.SC_OK);
resp.setContentType("application/octet-stream;charset=utf-8");
ObjectOutputStream oos = new ObjectOutputStream(
new BufferedOutputStream(resp.getOutputStream()));
oos.writeObject(o);
oos.close();
Best Regards
Ashish

Answer 1

client
URLConnection servletConnection = servletURL.openConnection();try
HttpURLConnection servletConnection = (HttpURLConnection)servletURL.openConnection();server
// send response
resp.setStatus(HttpServletResponse.SC_OK);
resp.setContentType("application/octet-stream;charset=utf-8");
ObjectOutputStream oos = new ObjectOutputStream(
new BufferedOutputStream(resp.getOutputStream()));
oos.writeObject(o);
oos.close();try
// send response
//resp.setStatus(HttpServletResponse.SC_OK);
//resp.setContentType("application/octet-stream;charset=utf-8");
ObjectOutputStream oos = new ObjectOutputStream(
new BufferedOutputStream(resp.getOutputStream()));
oos.writeObject(o);
oos.flush();
oos.close();