java - Spring Controller 处理程序方法中未注释参数的目的是什么？

Question

假设我有一个 POST 处理程序方法:

@PostMapping("/group/{id}")
public OutParameters findRealTimeOrder(@RequestParam String anyParam,
                                       @RequestBody String payload,
                                       @PathVariable("id") String groupId,
                                       InParameters parameters) {
    return service.process(parameters);
}

这里的所有注释都有描述性文档，所以我知道它们的用途是什么，但我不知道最后一个参数是做什么用的。它与请求有什么关系？

Answer 1

来自 spring doc:

If a method argument is not matched to any of the above, by default it is resolved as an @RequestParam if it is a simple type, as determined by BeanUtils#isSimpleProperty, or as an @ModelAttribute otherwise.