Solving the java.lang.String to Long Conversion Error in Pagination URL Handling

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The Problem: What’s Going Wrong?

This is problematic because the {id} placeholder in the URL gets replaced with %7Bid%7D, a URL-encoded version of a string representation, rather than staying as a numerical ID. Consequently, your application attempts to convert this string into a Long, resulting in the error.

The Solution: Ensuring Path Variables Stay Consistent

To solve this issue, we need to ensure that the path variable id remains consistent throughout pagination requests. Here’s a guide on how to implement this fix effectively.

Step 1: Pass the Correct Path Variable

In your controller, ensure that the path variable (id) is correctly captured and made accessible to your frontend view. Here’s what your controller method may look like:

[[See Video to Reveal this Text or Code Snippet]]

Step 2: Update the Pagination Links

Next, you’ll need to update the way pagination links are rendered in your HTML view so that they use the consistent path variable. Here’s how to modify the pagination section of your Thymeleaf template:

[[See Video to Reveal this Text or Code Snippet]]

Step 3: Testing the Changes

After making these changes, be sure to thoroughly test your pagination functionality:

Verify that no conversion errors occur and that the data displayed corresponds to the appropriate page.

Conclusion

If you follow these steps and implement the provided code snippets, you should have a smoothly functioning pagination system in your Spring application. Happy coding!