原生feign的使用之一（post请求 + body）

今天药忘吃喽~ 2023-10-06 09:57 37阅读 0赞

**注意：本文讲的是原生feign，不是结合spring使用feign**

*  场景描述

> 在开发的时候遇到一个问题：由于种种原因，需要使用**原生**feign发起一个post请求，请求体是json格式。

*  解决方案  
    见 [https://github.com/OpenFeign/feign][https_github.com_OpenFeign_feign] 的 readme 中 Encoders 部分  
    ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzE3NTg2ODIx_size_16_color_FFFFFF_t_70]
 *  测试

先启一个服务，代码很简单

@PostMapping(value = "/address/create")
        @ResponseBody
        public String createAddress(@RequestBody Address address) {
        
            System.out.println(address.getCountry() + "-----" + address.getProvince());
            return "OK";
        }

Address 类

@Getter
    @Setter
    @NoArgsConstructor
    @AllArgsConstructor
    public class Address {
        
    
        private String country;
    
        private String province;
    
    }

上面是服务端的代码，下面看一下客户端的代码

定义 feign 客户端，这里边有两个方法，分别用于测试上图中说的两种情况

public interface AddressClient {
        
    
        @RequestLine("POST /address/create")
        @Headers("Content-Type: application/json")
        String createAddress(String content);
    
        @RequestLine("POST /address/create")
        @Headers("Content-Type: application/json")
        String createAddress(Address address);
    
    }

开始测试

public class FeignTest {
        
    
        @Test
        public void test01() {
        
            AddressClient addressClient =
                    Feign.builder().target(AddressClient.class, "http://localhost:8082");
    
            String ok =
                    addressClient.createAddress("{\"country\": \"china\", \"province\": \"nanjing\"}");
    
            System.out.println("test01 " + ok);
        }
    
        @Test
        public void test02() {
        
            AddressClient addressClient = Feign.builder().encoder(new GsonEncoder())
                    .target(AddressClient.class, "http://localhost:8082");
    
            Address address = new Address("china", "beijing");
    
            String ok = addressClient.createAddress(address);
    
            System.out.println("test02 " + ok);
        }
    
    }

查看测试结果  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzE3NTg2ODIx_size_16_color_FFFFFF_t_70 1]

[https_github.com_OpenFeign_feign]: https://github.com/OpenFeign/feign
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[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzE3NTg2ODIx_size_16_color_FFFFFF_t_70 1]: https://img-blog.csdnimg.cn/20200528211202987.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzE3NTg2ODIx,size_16,color_FFFFFF,t_70