CODEWITHSUNDEEP
javahtmljspservlets
myonii
myonii

Reputation: 1

How to get the previous request form that returns an object to a Servlet?

[Passing an object from JSP page back to Servlet

From the top reviewed answer of the question above, What does Form preprocessing Servlet and Form postprocessing Servlet mean? Where do I put it in my servlet? Do I put it on the same method? Do I call preprocessing Servlet first then proceed with the form submission of my JSP file and then proceed to the postprocessing file?

Upvotes: 0

Views: 128

Answers (1)

Arvind Kumar Avinash
Arvind Kumar Avinash

Reputation: 79395

You write both the code in the same servlet in the sequence mentioned below:

A. Get the request parameters from the request (which may have values of HTML form elements and explicit request parameters), as mentioned in the Form postprocessing part

String myObjectId = request.getParameter("myObjectId");
Object myObject = request.getSession().getAttribute(myObjectId);
request.getSession().removeAttribute(myObjectId);
// ...

B. Perform some business logic and forward the request to some JSP, as mentioned in the Form preprocessing part

String myObjectId = UUID.randomUUID().toString();
request.getSession().setAttribute(myObjectId, myObject);
request.setAttribute("myObjectId", myObjectId);
request.getRequestDispatcher("/WEB-INF/page.jsp").forward(request, response);

Upvotes: 1

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