Stop Translating: Reuse Postman and Browser-Copied curl Fragments Directly in Java

How did you test that API endpoint? — I copied the curl command from Postman. That's why JQuickCurl exists. When a request works in Postman or browser DevTools, the raw curl command is the ground truth. In this post, you'll learn a repeatable recipe to reuse curl from Postman or Chrome DevTools in Java.

Step 1: Retrieve the curl snippet from Postman or Chrome DevTools. For Postman, open the saved request, click the "/ Code" button, and select "cURL". For Chrome DevTools, navigate to the Network tab, right-click the desired request, and select "Copy → Copy as cURL (bash)".

Step 2: Sanitize the curl command before pasting it into Java code. Remove or externalize any cookie, authorization, fingerprint, or tracking headers that aren't required by the API. Keep the method, URL, content type, payload, and any required headers.

Step 3: Paste the sanitized curl command into an @JCurlCommand annotation in your Java code. Collapse the multi-line command into a single line and use single quotes for Java string escaping. For dynamic values like order IDs, use ${variable} placeholders and provide them through a JQuickCurlReq object.

Step 4: Make the dynamic values work by creating a JQuickCurlReq object and populating it with the necessary parameters. Use the JCurlInvoker to create a proxy for your Java interface and call the annotated method with the request object.

Step 5: Verify the flow by running the example code against a public API like httpbin.org. The JQuickCurl library will handle the curl command parsing and execution, allowing you to quickly test and integrate API endpoints into your Java application.