如何在Spring中获取控制器对另一个控制器的JSON响应

@RestController
public class SenderController {
    
    @Autowired
    private RestTemplate restTemplate;
    
    @GetMapping("/send")
    public ResponseEntity<String> sendRequest() {
        HttpHeaders headers = new HttpHeaders();
        headers.setContentType(MediaType.APPLICATION_JSON);
        
        HttpEntity<String> requestEntity = new HttpEntity<>(headers);
        
        ResponseEntity<String> responseEntity = restTemplate.exchange(
            "http://localhost:8080/receiver",
            HttpMethod.GET,
            requestEntity,
            String.class
        );
        
        return responseEntity;
    }
}

@RestController
public class ReceiverController {
    
    @GetMapping("/receiver")
    public ResponseEntity<String> receiveRequest() {
        // 处理请求并返回响应
        String jsonResponse = "{\"message\": \"Hello, World!\"}";
        
        HttpHeaders headers = new HttpHeaders();
        headers.setContentType(MediaType.APPLICATION_JSON);
        
        return new ResponseEntity<>(jsonResponse, headers, HttpStatus.OK);
    }
}