如何使用澤西應用程序中的配置

Question

這裏是澤西島應用程序的代碼spring.I使用resttemplate檢查休息終點。 我想使用Appconfig類來配置resttemplate。我的意思是，當創建resttemplate實例時，它應該從appconfig restTemplate（）函數創建。有可能這樣做嗎？

//JerseyApplication.java 
public class JerseyApplication extends ResourceConfig 
{ 
    private static final org.slf4j.Logger LOG = LoggerFactory.getLogger(JerseyApplication.class); 

    /** 
    * Initialized the jersey application. 
    */ 
    public JerseyApplication() 
    { 
     register(JerseyFeature.class); 
     register(JsonFeature.class); 
     register(BeanValidationFeature.class); 
     register(new RequestResponseLoggingFilter(LOG)); 
    } 
} 

//TestResource.java 
@Component("apiTestResource") 
@PropertySource("classpath:default.properties") 
@Singleton 
public class TestResource{ 
    @javax.ws.rs.core.Context 
    private javax.ws.rs.core.UriInfo uriInfo; 

    @Autowired 
    private RestTemplate restTemplate; 

    private static final org.slf4j.Logger LOG = LoggerFactory.getLogger(TestResource.class); 
    public Response post() { 

     Response response = null; 

     UriComponentsBuilder uriComponents = UriComponentsBuilder.fromHttpUrl("http://test.com") 

     HttpEntity<String> requestPayload = new HttpEntity<String>("test string"); 

     ResponseEntity<String> responseEntity = util.postSyncRequest(restTemplate,uriComponents.build().encode().toUri(), 
       requestPayload); 

     response = Response.ok().entity(responseEntity.getBody().toString()).build(); 
     return response; 
    } 
} 
//Util.java 
public class Util { 

    private static final org.slf4j.Logger LOG = LoggerFactory.getLogger(Util.class); 
    public ResponseEntity<String> postSyncRequest(RestTemplate restTemplate ,URI uri, HttpEntity<String> requestPayload){ 
     ResponseEntity<String> responseEntity = null; 
     try{ 
      responseEntity = restTemplate.postForEntity(uri, requestPayload,String.class); 
     }catch(Exception ex){ 
      LOG.error("Error in post call " + ex.getMessage()); 
     } 
     return responseEntity; 
    } 
} 
//AppConfig.java 
@Configuration 
public class AppConfig { 
     @Bean 
     RestTemplate restTemplate() { 
      SimpleClientHttpRequestFactory requestFactory = new SimpleClientHttpRequestFactory(); 
      return new RestTemplate(requestFactory); 
     } 
} 
//applicationContext.xml 
<?xml version="1.0" encoding="UTF-8"?> 
<beans xmlns="http://www.springframework.org/schema/beans" 
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context" 
    xsi:schemaLocation="http://www.springframework.org/schema/beans 
     http://www.springframework.org/schema/beans/spring-beans.xsd 
     http://www.springframework.org/schema/context 
     http://www.springframework.org/schema/context/spring-context.xsd"> 

    <!-- include Service SDK libraries --> 
    <import resource="classpath:/META-INF/libraries-spring.xml" /> 

    <!-- include Service SDK API-Console helpers --> 
    <import resource="classpath*:/META-INF/api-console-spring.xml" /> 

    <!-- import placeholder values from property files and environment, see 
     default.properties --> 
    <context:property-placeholder 
     location="classpath:/default.properties,classpath*:test.properties" /> 

    <!-- take annotation-based configuration into account, when instantiating 
     beans --> 
    <context:annotation-config /> 

    <bean id="RestTemplate" class="org.springframework.web.client.RestTemplate"> 
    </bean> 

</beans> 

更新： 想什麼@jobin建議我收到以下錯誤

[ERROR] [o.s.web.context.ContextLoader] [] Context initialization failed 
org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'apiCurrencyS4hanaResource': Unsatisfied dependency expressed through field 'restTemplate': No qualifying bean of type [org.springframework.web.client.RestTemplate] found for dependency [org.springframework.web.client.RestTemplate]: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [org.springframework.web.client.RestTemplate] found for dependency [org.springframework.web.client.RestTemplate]: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)} 

Answer 1

是的，它是可能的，你做了什麼是正確的，但不需要SimpleClientHttpRequestFactory，你可以簡單地創建一個後如下圖所示的RestTemplate情況下，它會創建一個singleton豆你可以autowire到其他春天components

import org.springframework.web.client.RestTemplate; 

@Configuration 
public class AppConfig { 

    @Bean 
    RestTemplate restTemplate() { 
     return new RestTemplate(); 
    } 
}