SpringBoot 2.4.0版本后解决跨域问题

package com.atguigu.gulimall.gateway.config;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import org.springframework.web.cors.CorsConfiguration;
import org.springframework.web.cors.reactive.CorsWebFilter;
import org.springframework.web.cors.reactive.UrlBasedCorsConfigurationSource;

/**
 * @author xh
 * @Date 2022/1/28
 */
@Configuration
public class GulimallCrosConfiguration {

    @Bean
    public CorsWebFilter corsWebFilter() {

        CorsConfiguration corsConfiguration = new CorsConfiguration();
        //1,允许任何来源
        corsConfiguration.setAllowedOriginPatterns(Collections.singletonList("*"));
        //2,允许任何请求头
        corsConfiguration.addAllowedHeader(CorsConfiguration.ALL);
        //3,允许任何方法
        corsConfiguration.addAllowedMethod(CorsConfiguration.ALL);
        //4,允许凭证
        corsConfiguration.setAllowCredentials(true);

        UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
        source.registerCorsConfiguration("/**", corsConfiguration);
        return new CorsWebFilter(source);
    }
}

可能会报的错：

导错包啦！