使用webtestclient测试表单post

你需要使用 BodyInserters.fromFormData() 准备 body 请求的

   @Autowired
   private WebTestClient client;
   private WebTestClient.ResponseSpec response;

...

      response = client.mutateWith(csrf()).post().uri("/login")
               .contentType(MediaType.APPLICATION_FORM_URLENCODED)
               .body(BodyInserters.fromFormData("username", player)
                        .with("password", password))
               .exchange();