通过feign实现订单中心(feign调用服务,在orderservice中调用product-server)
1、copy orderserver 为orderserverfeign
2、并使用idea打开
3、将服务增加个feign
在项目右键修改名称orderserver为orderserverfeign
4、打开端口为8661 yml中的端口修改为8661
5、修改各类名称refacter,并将application名字也修改正确
6、增加依赖:
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-openfeign</artifactId>
</dependency>
7、在Application类中增加注释
@EnableFeignClients
8、service中增加一个type为interface的类:ProductFeignService
增加注解:@FeignClient(name="product-server")
注意:name为服务定义的名称
@FeignClient(name="PRODUCT-SERVICE") /*调用服务的名称必须和原服务名称一致,需要在服务中查找*/ 并增加一个函数,
public interface ProductFeignService {
@GetMapping("/api/v1/product/findById") /*调用服务目录必须和原服务名称一致,需要在服务中查找*/
String fingById(@RequestParam(value = "id") int id);
/**
* http://192.168.136.128:8766/api/v1/product/findById?id=2
*/
}
9、增加包utils(用于解析josn字符串为json对象)
增加类JsonUtils
private static final ObjectMapper objectMapper =new ObjectMapper();
/**
* json字符串转换为Json格式
*/
public static JsonNode str2JsonNode(String str){
try {
return objectMapper.readTree(str);
} catch (IOException e)
{
return null;
}
}
10、impl实现中增加
@Autowired
private ProductFeignService productFeignService;
public ProductOrderFeign save(int userId, int productId) {
//获取商品详情TODO
String response=productFeignService.fingById(productId);
JsonNode jsonNode=JsonUtils.str2JsonNode(response);
ProductOrderFeign productOrderFeign =new ProductOrderFeign();
productOrderFeign.setCreateTime(new Date());
productOrderFeign.setUserId(userId);
productOrderFeign.setProductId(productId);
productOrderFeign.setTradeNo(UUID.randomUUID().toString());
productOrderFeign.setProductName(jsonNode.get("name").toString());
productOrderFeign.setPrice(Integer.parseInt(jsonNode.get("price").toString()));
return productOrderFeign;;
11、运行、访问http://192.168.136.128:8661/api/v1/orderfeign/save?userId=2&productId=2成功