AWS Lambda - Spring @Autowire

Question

I developed a project using RestController in Spring Boot and it worked without error.

Now I use AWS lambda but I get a null pointer exception when I try to inject a Spring bean to the the lambda handler:

public class HelloWorldHandler implements RequestHandler<Map<String, Object>, Object> {

  @Autowired
  private IUserService userservice;

  public Object handleRequest(Map<String, Object> input, final Context context) {

    Map<String, String> headers = new HashMap<>();
    headers.put("Content-Type", "application/json");

    User testUser = new User();
    testUser.setId("10");
    testUser.setLastname("test_lastname");
    testUser.setMail("test@al.com");

    userservice.addUser(testUser);

    return new GatewayResponse("success", headers, 200);
  }
}

Exception:

{
  "errorMessage": "java.lang.NullPointerException",
  "errorType": "java.lang.NullPointerException",
  "stackTrace": [
    "HelloWorldHandler.handleRequest(HelloWorldHandler.java:30)",
    "HelloWorldHandler.handleRequest(HelloWorldHandler.java:21)"
  ]
}