I'm trying to implement a "self-validating" JSP form on Tomcat 3.1
(Win98/Netscape 4.7) which can be used to gather details (user name) which
are then forwarded to a servlet. The servlet forwards the posted data back
to the original JSP page for review.
When I run the JSP page, the default name is displayed, and I change the
name from "default" to "Bob". When the form is submitted to the servlet, it
reports that the name is still "default". How can I get the servlet to
recognise the newly posted data and report the name correctly as "Bob"? I
expected that the JSP page would push the "test" bean into the session and
that the servlet would access the same bean during the post - but this
doesn't appear to happen.
The outline code is below :
### test.jsp
...
<jsp:useBean id="test" class="freesia.Test" scope="session">
<jsp:setProperty name="test" property="*" />
</jsp:useBean>
<form action="/freesia/servlet/test_servlet" method="post">
Enter a name : <input type="text" name="name" value="<jsp:getProperty
name="test" property="name" />"
<input type="submit" value="submit">
</form>
...
### test_servlet
public void doPost(HttpServletRequest request, HttpServletResponse
response) throws ServletException, IOException {
System.out.println("do post start");
HttpSession session = request.getSession(true);
System.out.println("got session"); // <== gets old value - not the
entered value!
Test thisTest = (Test) session.getAttribute("test");
System.out.println("entered value = " + thisTest.getName());
session.setAttribute("test", thisTest);
System.out.println("##### forwarding ##### ");
getServletConfig().getServletContext().getRequestDispatcher("/test.jsp").for
ward(request, response);
}
### Test.java
public class Test extends Object {
String name= new String("default");
/**
* Constructor
*/
public Test() {
}
public void setName(String value) {
name=value;
}
public String getName() {
return name;
}
}
The output is :
do post start
got session
entered value = default <= HOW DO I GET THIS TO READ "BOB" INSTEAD
##### forwarding #####
I've tried using request scope instaed, but the
request.getAttribute("test") produces a null bean object - why?
Thanks in advance for any help - this has been bothering me for days!
Neil
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