我在addCorsMappings()方法中错误地编写了*而不是/**

I have mistakenly written * instead of /** in addCorsMappings() method

现在方法看起来像

@Override
    public void addCorsMappings(CorsRegistry registry) {
        registry.addMapping("/**").allowedMethods("GET", "POST", "PUT", "PATCH", "DELETE", "OPTIONS")
                .allowedHeaders("*")
                .allowedOrigins("http://localhost:4200","http://localhost:8080");
        WebMvcConfigurer.super.addCorsMappings(registry);
    }

此外，此后Angular客户端无法获取响应，并为空 在响应中，所以我将其修改为

Also, After that Angular client wasn't able to grab the response and was getting null in the response so I modifed it as

submitData(credential){
    credential = JSON.stringify(credential);
    return this._http.post("http://localhost:8080/login",credential,{observe: 'response'});
  }

现在我正在获得Http响应.

Now I am getting Http response.