Spring Boot 允许跨域

 @Bean
    public CorsConfigurationSource corsConfigurationSource(){
        CorsConfiguration configuration = new CorsConfiguration();
        configuration.addAllowedOrigin("*");
        configuration.setAllowedMethods(Arrays.asList("GET", "POST", "DELETE", "PUT","OPTIONS","HEAD"));
        configuration.addAllowedHeader("*");
        configuration.setAllowCredentials(Boolean.TRUE);
        configuration.applyPermitDefaultValues();
        UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
        source.registerCorsConfiguration("/**", configuration);
        return source;
    }

    @Bean
    CorsFilter corsFilter(CorsConfigurationSource corsConfigurationSource) {
        CorsFilter corsFilter = new CorsFilter(corsConfigurationSource);
        return corsFilter;
    }