With JQuickCurl, a Java interface method annotated with @JCurlCommand can hold a curl-style REST command, while a JQuickCurlReq supplies runtime values such as resource IDs and JSON fields. A proxy created with JCurlInvoker.createProxy(...) invokes the methods. The example below follows the tutorial’s JSON GET, POST, PUT, and DELETE pattern against ReqRes, a mock API; its responses describe the tutorial example, not a live check of the service.
How the annotation pattern fits together
Each interface method stores a command string describing the HTTP verb, endpoint, headers, and, where needed, request body. Values that change between calls appear as ${...} placeholders. At invocation time, the caller puts matching values into a JQuickCurlReq and calls the corresponding method on a proxy created by JCurlInvoker.createProxy(...).
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The tutorial notes that method name, HTTP verb, and URL are decoupled in this arrangement: the command string specifies the request, while the declared Java return type determines how the response is handled. The examples below show the pattern rather than a guarantee about ReqRes availability.
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Describe JSON GET, POST, PUT, and DELETE calls
| Operation | Command pattern | Runtime values | Typical response handling |
|---|---|---|---|
| GET | Use a resource URL containing an ${id} placeholder. |
Supply the resource ID through JQuickCurlReq. |
Return the body as a String or map JSON to a POJO. |
| POST | Set Content-Type: application/json and include a JSON data body with placeholders such as ${name} and ${job}. |
Put matching name and job values into the request object. | Choose a response type appropriate to the returned body, such as a POJO or string. |
| PUT | Send a JSON update body to a resource URL containing ${id}. |
Supply the ID and update fields via the request object. | Choose a suitable response type for the body. |
| DELETE | Call the resource URL containing ${id}. |
Supply the resource ID. | Use Void when the caller does not need a body. |
The tutorial’s examples use values such as request.put("id", 2) and request.put("name", "Ada"), then pass the populated request to the proxy method. Keep the placeholder names in the command and the keys added to the request consistent so the intended runtime values can be substituted.
Choose a Java return type for the response
String: use when the caller wants the raw response body.- A POJO: use when the caller wants JSON mapped to a domain object.
List<T>: use for a JSON array represented as a collection.Void: use when the response body can be discarded, as in the tutorial’s DELETE example.byte[]or a result-wrapper type: also listed by the tutorial as response styles.
These are conversion capabilities described by the tutorial, not independently measured or tested behavior. The tutorial says its sample DELETE receives HTTP 204; treat that as the sample’s stated result, not confirmation of the mock API’s current behavior.
Know the limits of curl-style commands
The JQuickCurl repository documents annotation-based requests, XML configuration, dynamic proxies, and response conversion. Its README also lists methods beyond the four covered here, including PATCH, HEAD, OPTIONS, and TRACE. These are project documentation claims rather than independently verified results.
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The repository warns, “JQuickCurl is not a complete replacement for the system curl command.” Embedding a curl-style command in an annotation therefore does not establish support for every option available in standalone curl. Verify an unlisted option or HTTP method against the current parser and test cases before depending on it.
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The project README reports Maven version 2.2.0. That is the version stated in the README, not an independently checked package-registry release; check the project’s current documentation before selecting a dependency version.
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