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

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);
}