How to autowire RestTemplate using annotations

Question

When I try to autowire Spring RestTemplate  I am getting following error   nested exception is org springframework beans factory NoSuchBeanDefinitionException  No qualifying bean of type  org springframework web client RestTemplate  found for dependency  expected at least 1 bean which qualifies as autowire candidate for this dependency   Using Spring 4 in an annotation driven environment   My dispatcher servlet is configured as follows    lt context component-scan base-package  in myproject    gt   lt mvc default-servlet-handler   gt       lt mvc annotation-driven   gt   lt bean id  restTemplate  class  org springframework web client RestTemplate   gt    My class in which I am trying to autowire RestTemplate is as follows    Service  httpService   public class HttpServiceImpl implements HttpService     Autowired private RestTemplate restTemplate    Override public void sendUserId String userId        MultiValueMap lt String  String gt  map   new LinkedMultiValueMap lt  gt         map add  userId   userId       map add  secretKey    kbhyutu7576465duyfy         restTemplate postForObject  http   localhost 8081 api user   map  null

User · Answer

You can add the method below to your class for providing a default implementation of RestTemplate    Bean public RestTemplate restTemplate         return new RestTemplate

User · Answer

Errors you ll see if a RestTemplate isn t defined     Consider defining a bean of type    org springframework web client RestTemplate  in your configuration    or     No qualifying bean of type    org springframework web client RestTemplate  found   How to define a RestTemplate via annotations  Depending on which technologies you re using and what versions will influence how you define a RestTemplate in your  Configuration class   Spring    4 without Spring Boot  Simply define an  Bean    Bean public RestTemplate restTemplate         return new RestTemplate        Spring Boot  lt   1 3  No need to define one  Spring Boot automatically defines one for you   Spring Boot    1 4  Spring Boot no longer automatically defines a RestTemplate but instead defines a RestTemplateBuilder allowing you more control over the RestTemplate that gets created  You can inject the RestTemplateBuilder as an argument in your  Bean method to create a RestTemplate    Bean public RestTemplate restTemplate RestTemplateBuilder builder          Do any additional configuration here    return builder build        Using it in your class   Autowired private RestTemplate restTemplate    or    Inject private RestTemplate restTemplate

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Add the  Configuration annotation in the RestTemplateSOMENAME which extends the RestTemplate class    Configuration          public class RestTemplateClass extends RestTemplate        Then in your controller class you can use the Autowired annotation as follows    Autowired    RestTemplateClass restTemplate

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import org springframework context annotation Bean  import org springframework context annotation Configuration  import org springframework web client RestTemplate    Configuration public class RestTemplateClient        Bean     public RestTemplate restTemplate             return new RestTemplate

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If you re using Spring Boot 1 4 0 or later as the basis of your annotation-driven  Spring doesn t provides a single auto-configured RestTemplate bean  From their documentation   https   docs spring io spring-boot docs 1 4 0 RELEASE reference html boot-features-restclient html     If you need to call remote REST services from your application  you can use Spring Framework   s RestTemplate class  Since RestTemplate instances often need to be customized before being used  Spring Boot does not provide any single auto-configured RestTemplate bean  It does  however  auto-configure a RestTemplateBuilder which can be used to create RestTemplate instances when needed  The auto-configured RestTemplateBuilder will ensure that sensible HttpMessageConverters are applied to RestTemplate instances

User · Answer

Autowired private RestOperations restTemplate    You can only autowire interfaces with implementations

[java] How to autowire RestTemplate using annotations

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