Springboot单体项目使用Feign

参考: https://www.jianshu.com/p/e99c4083935e

以下为自我实践

在单体项目也常常需要使用三方调用，类似的实现可以使用httpClient调用之类的，但是接口代理注入的方式来的优雅的许多，比如Feign，那么如何实现Springboot不依赖SpringCloud进行调用呢？

1.导入依赖

<dependency>
     <groupId>com.netflix.feign</groupId>
     <artifactId>feign-core</artifactId>
     <version>8.18.0</version>
</dependency>
<dependency>
     <groupId>com.netflix.feign</groupId>
     <artifactId>feign-jackson</artifactId>
     <version>8.18.0</version>
</dependency>

2.Feign接口

public interface AkshareFeign {

    @RequestLine("GET /api/stock_em_account")
    @Headers({"Content-Type: application/json;utf-8"})
    Object getStockEmAccount();

}

3.自定义配置

@Configuration
public class WebConfig {
    @Bean
    AkshareFeign akshareFeign(MyDecoder myDecoder) {
        // 自定义decoder
        return Feign.builder().decoder(myDecoder).target(AkshareFeign.class, "http://127.0.0.2:8080");
    }
}

import com.fasterxml.jackson.databind.ObjectMapper;
import feign.FeignException;
import feign.Response;
import feign.Util;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Primary;
import org.springframework.stereotype.Component;

import feign.codec.Decoder;

import java.io.IOException;
import java.lang.reflect.Type;

/**
 * @author luodada
 */
@Component
public class CustomDecoder implements Decoder {

    @Autowired
    private ObjectMapper mapper;

    @Override
    public Object decode(Response response, Type type) throws IOException, FeignException {
        // 可扩展自定义解析
        String result = Util.toString(response.body().asReader());
        return mapper.readValue(result, Object.class);
    }

}

以上。