@Configuration

public class corsConfig {

    @Autowired

    varModel varModel_;

    @Bean

    public WebMvcConfigurer corsConfigurer() {

        return new WebMvcConfigurer() {

            @Override

            //重写父类提供的跨域请求处理的接口

            public void addCorsMappings(CorsRegistry registry) {

                //添加映射路径

                registry.addMapping("/**")

                        .allowedHeaders("*")

                        .allowedMethods("*")

                        .allowedOrigins(varModel_.getCorsStrList());

            }

        };

    }

}//end

$.ajax({

            type: "POST",

            url: "http://localhost:8000/a/b",

            contentType: "application/json; charset=utf-8",

            dataType: "json",

            data: JSON.stringify({

                "requestId": ""

            }),

            success: function (d) {

                console.log(d);

            },

            error: function () {

                //alert("系统错误");

            }

        });