最近用Axios做get请求时发现前台报

XMLHttpRequest cannot load http://127.0.0.1:8080/sayHello. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://127.0.0.1:8010' is therefore not allowed access.

我这边是用SpringBoot做的后台 

只需在代码里加入这个配置就可以解决SpringBoot跨域的问题

package com.rong.demo.common.config;

import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; import org.springframework.web.cors.CorsConfiguration; import org.springframework.web.cors.UrlBasedCorsConfigurationSource; import org.springframework.web.filter.CorsFilter;

@Configuration public class CorsConfig { private CorsConfiguration buildConfig() { CorsConfiguration corsConfiguration = new CorsConfiguration(); corsConfiguration.addAllowedOrigin("*"); // 1 corsConfiguration.addAllowedHeader("*"); // 2 corsConfiguration.addAllowedMethod("*"); // 3 return corsConfiguration; }

@Bean
public CorsFilter corsFilter() {
    UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
    source.registerCorsConfiguration("/\*\*", buildConfig()); // 4
    return new CorsFilter(source);
}

}