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Struts & Hibernate
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| | | serialization (tomcat) | serialization (tomcat) 2004-01-19 - By SBawek Tuleja
Back
Hi
A have problem with serialization of objects in tomcat.
I wrote something like this:
servlet:
__ ____ ____ ____ ____ ____ _____package tunelowanie_http;
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
public class DataStreamEcho extends HttpServlet
{
public void doGet(HttpServletRequest req,
HttpServletResponse resp)
throws ServletException, java.io.IOException 
{
String text = "Hi";
resp.setContentType("application/x-java-serialized-object");
//resp.setContentType("application/octet-stream");
ObjectOutputStream out = new ObjectOutputStream(resp.getOutputStream());
out.writeObject(text);
out.flush();
}
}
__ ____ ____ ____ ____ ____ ____ _____
APPLICATION:
__ ____ ____ ____ ____ ____ ____ _____
package tunelowanie_http;
import java.io.*;
public class TestDataStream
{
public static void main(String args[])
{
if (args.length == 0) {
System.out.println("\nServlet URL must be specified");
return;
}
try {
System.out.println("Attempting to connect to " + args[0]);
java.net.URL .html>java.net.URL java.net.URL .java.html>' border=0> url = new java.net.URL .html>java.net.URL java.net.URL .java.html>' border=0>(args[0]);
java.net.URLConnection con = url.openConnection();
con.setRequestProperty("Content-type","application/x-java-
serialized-object");
//con.setRequestProperty("Content-type","application/octet-stream");
con.setUseCaches(false);
System.out.println("Reading response");
ObjectInputStream in = new ObjectInputStream(con.getInputStream());
String returned = (String)in.readObject();
in.close();
System.out.println("Data read: " + returned );
}
catch (Exception ex) {
ex.printStackTrace();
}
}
}
__ ____ ____ ____ ____ ____ ____ ____ ____ _____
When i'm using "application/x-java-serialized-object" it seems tomcat does
not recognize this type
when i'm using "application/octet-stream" its connecting but it returns
objectinputstream Exception:
wrong header or sth.
this same happens when i want to send single number using:
writeInt readInt
writeBoolean readBoolean [i dont have code with me right now so i dont
remember exactly]
but when i sent e.g. int 5, i recive int 26487485 it seems tomcat write
some prefixes in both examples
im sure that it is problem of tomcat because i can serialize objets to file
and read them back.
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