springcloud的feign访问方式1.4.1和2.0.1兼容问题，提供服务《一》

1.依赖包

 

<dependency>
   <groupId>org.springframework.cloud</groupId>
   <artifactId>spring-cloud-starter-feign</artifactId>
   <version>1.4.1</version>
</dependency>
<dependency>
   <groupId>org.springframework.cloud</groupId>
   <artifactId>spring-cloud-starter-eureka</artifactId>
   <version>1.4.1</version>
</dependency>

 

2.feign1.4.1兼容2.0.1

2.1先创建2.0.1需要的FeignClient对象

包名：org.springframework.cloud.openfeign

类详情：

package org.springframework.cloud.openfeign;
import java.lang.annotation.Documented;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.springframework.core.annotation.AliasFor;
/**
 * Annotation for interfaces declaring that a REST client with that interface should be
 * created (e.g. for autowiring into another component). If ribbon is available it will be
 * used to load balance the backend requests, and the load balancer can be configured
 * using a <code>@RibbonClient</code> with the same name (i.e. value) as the feign client.
 *
 * @author Spencer Gibb
 * @author Venil Noronha
 */
@Target(ElementType.TYPE)
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface FeignClient {

   /**
    * The name of the service with optional protocol prefix. Synonym for {@link #name()
    * name}. A name must be specified for all clients, whether or not a url is provided.
    * Can be specified as property key, eg: ${propertyKey}.
    */
@AliasFor("name")
   String value() default "";
/**
    * The service id with optional protocol prefix. Synonym for {@link #value() value}.
    *
    * @deprecated use {@link #name() name} instead
    */
@Deprecated
String serviceId() default "";
/**
    * The service id with optional protocol prefix. Synonym for {@link #value() value}.
    */
@AliasFor("value")
   String name() default "";
/**
    * Sets the <code>@Qualifier</code> value for the feign client.
    */
String qualifier() default "";
/**
    * An absolute URL or resolvable hostname (the protocol is optional).
    */
String url() default "";
/**
    * Whether 404s should be decoded instead of throwing FeignExceptions
    */
boolean decode404() default false;
/**
    * A custom <code>@Configuration</code> for the feign client. Can contain override
    * <code>@Bean</code> definition for the pieces that make up the client, for instance
    * {@link feign.codec.Decoder}, {@link feign.codec.Encoder}, {@link feign.Contract}.
    *
    * @see FeignClientsConfiguration for the defaults
    */
Class<?>[] configuration() default {};
/**
    * Fallback class for the specified Feign client interface. The fallback class must
    * implement the interface annotated by this annotation and be a valid spring bean.
    */
Class<?> fallback() default void.class;
/**
    * Define a fallback factory for the specified Feign client interface. The fallback
    * factory must produce instances of fallback classes that implement the interface
    * annotated by {@link FeignClient}. The fallback factory must be a valid spring
    * bean.
    *
    * @see feign.hystrix.FallbackFactory for details.
    */
Class<?> fallbackFactory() default void.class;
/**
    * Path prefix to be used by all method-level mappings. Can be used with or without
    * <code>@RibbonClient</code>.
    */
String path() default "";
/**
    * Whether to mark the feign proxy as a primary bean. Defaults to true.
    */
boolean primary() default true;
}

 

2.2接口类集成

@FeignClient(url = "127.0.0.1:8082", value = "receiver", path = "/api/receiver")
@org.springframework.cloud.openfeign.FeignClient(url = "127.0.0.1:8082", value = "receiver", path = "/api/receiver")
public interface ReceiverJobApiService {

    @RequestMapping(value = "/recvJob", method = RequestMethod.POST)
    HttpResponse recvJob(@RequestBody RecvJobParam recvJobParam);
}

 

2.3其它