SpringBoot WebClient request interface error 400, how to get the error message returned by the api

How to get the error message returned by the WebClient request api {“Code”: “-1”, “Message”: “Fail”} instead of Org. Spring framework. Web. Reactive. Function. Client. Webclientresponseexception $badrequest: 400bad Request from Post https://url

Comment From: DengChen2020

The problem has been resolved using exchangeToMono.