FeignClient 调用服务端时，服务端报错:Request method ‘POST‘ not supported]

灰太狼 2023-01-03 04:53 203阅读 0赞

## FeignClient 调用服务端时，服务端报错:Resolved \[org.springframework.web.HttpRequestMethodNotSupportedException: Request method ‘POST’ not supported\] ##

#### FeignClient 端 ####

@GetMapping("/purchasingOrder/selectAllPurchasingOrderForJointQuery")
        CommonResult<PageInfo<PurchasingOrder>> selectAllPurchasingOrderForJointQuery(
    	    @RequestParam("page") Integer page,
    	    @RequestParam("pageSize") Integer pageSize,
    	    @RequestBody PurchasingOrder purchasingOrder);

#### 被调用服务端 ####

@GetMapping("/purchasingOrder/selectAllPurchasingOrderForJointQuery")
    public CommonResult<PageInfo<PurchasingOrder>> selectAllPurchasingOrderForJointQuery(
    										@RequestParam("page") Integer page,
    										@RequestParam("pageSize") Integer pageSize,
    										@RequestBody PurchasingOrder purchasingOrder){ 
    	return purchasingOrderService.selectAllPurchasingOrderForJointQuery(page, pageSize, purchasingOrder);
    }

#### 报错： ####

Resolved [org.springframework.web.HttpRequestMethodNotSupportedException: Request method 'POST' not supported]

说不支持Post请求，但是我FeignClient 端用的是Get请求，服务端用的也是Get请求，为什么会报错不支持Post请求呢？  
而我把客户端和服务端都改成Post请求后，就解决问题了。

#### 原因： ####

因为我FeignClient 端的请求参数是@RequestBody PurchasingOrder purchasingOrder，当把对象转换为json字符串的时候 FeignClient会默认发送Post请求

#### 解决方法 ####

1、如果使用@RequestBody 注解，把客户端与服务端都改为Post请求  
2、如果非要用Get传送对象类型参数，可以使用@SpringQueryMap注解，前提是的springboot 2.2版本以上，它的作用是直接以对象的形式传参，服务端可直接用以下方式接收参数：

@GetMapping("/purchasingOrder/selectAllPurchasingOrderForJointQuery")
    public CommonResult<PageInfo<PurchasingOrder>> selectAllPurchasingOrderForJointQuery(
    										@RequestParam("page") Integer page,
    										@RequestParam("pageSize") Integer pageSize,
    										PurchasingOrder purchasingOrder){ 
    	return purchasingOrderService.selectAllPurchasingOrderForJointQuery(page, pageSize, purchasingOrder);
    }