一般都是后台没有设置cors 那springboot 举例 添加 @Configuration public class GlobalCorsConfig { @Bean public CorsFilter corsFilter() { CorsConfiguration config = new CorsConfiguration(); config.addAllowedOrigin("http://127.0.0.1:25524"); config.setAllowCredentials(true); config.addAllowedMethod("OPTIONS"); config.addAllowedMethod("HEAD"); config.addAllowedMethod("GET"); config.addAllowedMethod("PUT"); config.addAllowedMethod("POST"); config.addAllowedMethod("DELETE"); config.addAllowedMethod("PATCH"); config.addAllowedHeader("*"); UrlBasedCorsConfigurationSource configSource = new UrlBasedCorsConfigurationSource(); configSource.registerCorsConfiguration("/**", config); return new CorsFilter(configSource); } }