Spring Cloud之遠程調用OpenFeign參數傳遞

更新時間：2025年03月14日 12:19:30 作者：新綠MEHO

本文介紹了Spring Cloud中使用OpenFeign進行遠程調用時,參數傳遞的不同方式,包括傳遞單個參數、多個參數、對象和JSON數據,感興的朋友一起看看吧

OpenFeign參數傳遞

傳遞單個參數

服務提供方product-service

@RequestMapping("/product")
@RestController
public class ProductController {
    @Autowired
    private ProductService productService;
    @RequestMapping("/p1")
    public String p1(Integer id){
        return "product-service 接收到參數, id:"+id;
    }
}

Feign客戶端

@FeignClient(value = "product-service",path = "/product")
public interface ProductApi {
    @RequestMapping("/p1")
    String p1(@RequestParam("id") Integer id);
}

遠程調用方order-service

@RequestMapping("/feign")
@RestController
public class FeignController {
    @Autowired
    private ProductApi productApi;
    @RequestMapping("/o1")
    public String o1(Integer id){
        return productApi.p1(id);
    }
}

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傳遞多個參數

服務提供方product-service

@RequestMapping("/product")
@RestController
public class ProductController {
    @Autowired
    private ProductService productService;
    @RequestMapping("/p2")
    public String p2(Integer id, String name){
        return "product-service 接收到參數, id:"+id+",name:"+name;
    }
}

Feign客戶端

@FeignClient(value = "product-service",path = "/product")
public interface ProductApi {
    @RequestMapping("/p2")
    String p2(@RequestParam("id") Integer id, @RequestParam("name") String name);
}

遠程調用方order-service

@RequestMapping("/feign")
@RestController
public class FeignController {
    @Autowired
    private ProductApi productApi;
    @RequestMapping("/o2")
    public String o2(Integer id, String name){
        return productApi.p2(id,name);
    }
}

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傳遞對象

服務提供方product-service

@RequestMapping("/product")
@RestController
public class ProductController {
    @Autowired
    private ProductService productService;
    @RequestMapping("/p3")
    public String p3(ProductInfo productInfo){
        return "product-service 接收到參數: productInfo"+productInfo.toString();
    }
}

Feign客戶端

@FeignClient(value = "product-service",path = "/product")
public interface ProductApi {
    @RequestMapping("/p3")
    String p3(@SpringQueryMap ProductInfo productInfo);
}

遠程調用方order-service

@RequestMapping("/feign")
@RestController
public class FeignController {
    @Autowired
    private ProductApi productApi;
    @RequestMapping("/o3")
    public String o3(){
        ProductInfo productInfo = new ProductInfo();
        productInfo.setId(45);
        productInfo.setProductName("T恤");
        return productApi.p3(productInfo);
    }
}

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傳遞JSON

服務提供方product-service

@RequestMapping("/product")
@RestController
public class ProductController {
    @Autowired
    private ProductService productService;
    @RequestMapping("/p4")
    public String p4(@RequestBody ProductInfo productInfo){
        return "product-service 接收到參數: productInfo"+productInfo.toString();
    }
}

Feign客戶端

@FeignClient(value = "product-service",path = "/product")
public interface ProductApi {
    @RequestMapping("/p4")
    String p4(@RequestBody ProductInfo productInfo);
}

遠程調用方order-service

@RequestMapping("/feign")
@RestController
public class FeignController {
    @Autowired
    private ProductApi productApi;
    @RequestMapping("/o4")
    public String o4(){
        ProductInfo productInfo = new ProductInfo();
        productInfo.setId(46);
        productInfo.setProductName("T恤46");
        return productApi.p4(productInfo);
    }
}

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