validation - Best way to validate URL parameters in Spring MVC website? -


I am using Spring MVC to create my web application, and I have validated the standards found in the URL There is a question about What is the best way for a user to detect invalid parameters and display errors?

Suppose I have a "see user profile" page based on the user ID parameter specified in the profile URL displayed. I can go to the following address to see the user's profile with ID 92:

I created a profile controller Object that will do the following:

  1. Receive id from request object
  2. < UserProfile Create a ModelAndView User User Profile "JSP < / Li>

    This works fine if the user enters a valid ID number My UserProfile object has been loaded and is fully displayed using JSP . But what if a user ID sends -30294 to my page? If the ID is invalid, then my data access layer will return a null object, but I want to show a friendly error message to the user. Checking the best solution for a null user profile object in the JSP code?

    Since I'm new to Spring, I'm not sure. I can be used with the validator sections with the FormController object, if this is any help.

    If the DAO cancels, return ModelAndView to just an error page

    Example: 

      User Profile Profile = User ProfileDOO.FindUserProfileBYD (User ID); If (profile == faucet) {Return new model and view ("error", "message", "invalid user id"); } And {// process accordingly. }

    In Spring 2.5 Distribution, check the jpetstore application in the samples directory. Find an org.springframework.samples.jpetstore.web.spring.SignonController for a simple example with an application.


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