@RequestBody annotation in interface is ignored [SPR-15714]

[spring-projects-issues]

Zhihong Zhang opened SPR-15714 and commented

Spring checks super-class/interface for annotation so all Spring annotations are inherited. This works for @RequestMapping and @RequestParam. However, it doesn't work for @RequestBody. This is inconsistent at least.

In the attached example, @RequestMapping is inherited but body doesn't get the JSON because @RequestBody in interface is ignored.

To reproduce the error, run the App.java and run this curl command,

curl -H “Content-Type: application/json” -X POST -d ‘{“bar”:“world”}’ http://localhost:8080/test?foo=hello

public interface TestApi {

    @RequestMapping(value = "/test", produces = { "text/html" })
    @ResponseBody
    String test(
            @RequestParam String foo,
            @RequestBody Map<String, Object> body
    );

}

@Controller
public class TestController implements TestApi {
    public String test(String foo, Map<String, Object> body) {
        String bar;
        if (body == null) {
            bar = null;
        } else {
            bar = (String)(body.get("bar"));
        }
        return "<h1>foo=" + foo + "<br>bar=" + bar + "</h1>";
    }
}

---

Affects: 4.3.7

Attachments:

• spring-bug.tar (9.00 kB)

Issue Links:

• Enable REST controller method parameter annotations on an interface [SPR-11055] #15682 Enable REST controller method parameter annotations on an interface ("duplicates")
• Supports annotating parameter annotations like @PathVariable on interface method [SPR-16110] #20658 Supports annotating parameter annotations like @PathVariable on interface method