使用对象作为参数从另一个控制器调用控制器并检索响应

Question

我有两个休息控制器。两者都是后映射端点。

在第一个控制器 (Controller1) 使我需要的所有东西都成为一个对象之后，我想调用/重定向第二个控制器以便继续，然后从它那里得到响应。

@RestController

public class Controller1{

    @PostMapping("/endpoint1")

    public ReponseEntity<?> doWhatController1HasToDo(@RequestBody Object request){

       //some processing

       //here i would like to call second controller

    }

}

@RestController

public class Controller2{

    @PostMapping("/endpoint2")

    public ReponseEntity<?> doWhatController2HasToDo(@RequestBody Object request){

       //some processing

       return new ResponseEntity<>(JSON, HttpStatus.OK);

    }

}

我尝试过使用 RestTemplate，但总是出现 405 错误。我在某处读过，这是因为多部分

private ResponseEntity forwardUsingRestTemplate(HttpServletRequest httpServletRequest, Object object) throws MalformedURLException {

        HttpHeaders headers = new HttpHeaders();

        headers.setContentType(MediaType.APPLICATION_JSON);

        HttpEntity req = new HttpEntity(object, headers);

        RestTemplate template = new RestTemplate();

        ResponseEntity<TdmResponse> response = template.exchange(getBaseUrl(httpServletRequest) + "/endpoint2", HttpMethod.POST, req, TdmResponse.class);

}

问题是，我如何调用第二个端点？

Answer 1

为什么需要调用另一个端点？这些控制器是否位于单独的应用程序中？如果不是，那么在这两个控制器之上使用服务会更有效：public class Service {&nbsp;public Object processController1(Object object) {&nbsp;//some processing&nbsp;return processController2(result of some processing);&nbsp;}&nbsp;public Object processController2(Object object) {&nbsp;// processing&nbsp;}}然后在你的控制器中使用这两种方法：public class Controller1{&nbsp; &nbsp; private Service service;&nbsp; &nbsp; public ReponseEntity<?> doWhatController1HasToDo(@RequestBody Object request){&nbsp; &nbsp; &nbsp; &nbsp;return new ResponseEntity<>(service.processController1(request), OK);&nbsp; &nbsp; }}public class Controller2{&nbsp; &nbsp; private Service service;&nbsp; &nbsp; public ReponseEntity<?> doWhatController1HasToDo(@RequestBody Object request){&nbsp; &nbsp; &nbsp; &nbsp;return new ResponseEntity<>(service.processController2(resultProcess1), OK);&nbsp; &nbsp; }}如果有 2 个不同的应用程序，那么问题可能出在您的 CSRF 设置上。如果您在第二个应用程序中启用了 CSRF，那么它将拒绝您的呼叫，因为您没有使用 RestTemplate 传递 CSRF 令牌。稍后编辑：您可以使用外观模式在控制器和服务之间添加另一层抽象：public class Facade{&nbsp; &nbsp; private Service1 service1;&nbsp; &nbsp; private Service2 service2;&nbsp; &nbsp; public ReponseEntity<?> doWhatController1HasToDo(@RequestBody Object request){&nbsp; &nbsp; &nbsp; &nbsp;Object resultService1 = service1.process(request);&nbsp; &nbsp; &nbsp; &nbsp;Object resultService2 = service2.process(resultService1);&nbsp; &nbsp; &nbsp; &nbsp;return new ResponseEntity<>(resultService2, OK);&nbsp; &nbsp; }&nbsp; &nbsp; public ReponseEntity<?> doWhatController2HasToDo(@RequestBody Object request){&nbsp; &nbsp; &nbsp; &nbsp;Object resultService2 = service2.process(request);&nbsp; &nbsp; &nbsp; &nbsp;return new ResponseEntity<>(resultService2, OK);&nbsp; &nbsp; }}

Answer 2

您还可以将第二个控制器注入第一个控制器中，然后直接调用该方法。如果您不想动态更改端点，则此方法有效。

Answer 3

您的控制器使用@RestController进行注释，这意味着从控制器方法返回的任何内容都将以 json 或 xml 的形式解释。在您的情况下，如果您从Controller1 的doWhatController1HasToDo返回任何内容，它会将其处理为 json 或 xml。您应该通过以下方式做到这一点。它可能对你有帮助。@Controllerpublic class Controller1{@PostMapping("/endpoint1")public String doWhatController1HasToDo(@RequestBody Object request){&nbsp; &nbsp;//some processing&nbsp; &nbsp;return "redirect:/doWhatController2HasToDo";} }我假设，您的两个控制器都在同一个文件夹中（即 Controller1 和 Controller2）。这将调用 Controller2 的方法doWhatController2HasToDo(@RequestBody Object request)，您可以对该方法执行任何操作，例如@RestControllerpublic class Controller2{@PostMapping("/endpoint2")public ReponseEntity<?> doWhatController2HasToDo(@RequestBody Object request){&nbsp; &nbsp;//some processing&nbsp; &nbsp;return new ResponseEntity<>(JSON, HttpStatus.OK);}}