关于springboot2.4跨域配置问题

```

import org.springframework.context.annotation.Configuration;

import org.springframework.web.servlet.config.annotation.CorsRegistry;

import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;

/**

  * @author yk

  * @date 2021/7/19 14:36

  */

@Configuration

public class WebConfig implements WebMvcConfigurer {

     @Override

     public void addCorsMappings(CorsRegistry registry) {

         registry.addMapping( "/**" )

                 .allowedOriginPatterns( "*" )

                 .allowedMethods( "*" )

                 .maxAge( 3600 )

                 .allowCredentials( true );

     }

}

```

```

import org.springframework.boot.web.servlet.FilterRegistrationBean;

import org.springframework.context.annotation.Bean;

import org.springframework.context.annotation.Configuration;

import org.springframework.core.Ordered;

import org.springframework.web.cors.CorsConfiguration;

import org.springframework.web.cors.UrlBasedCorsConfigurationSource;

import org.springframework.web.filter.CorsFilter;

/**

  * @author yk

  * @date 2021/7/19 16:21

  */

@Configuration

public class CrosConfig {

     @Bean

     public FilterRegistrationBean corsFilter() {

         CorsConfiguration config = new CorsConfiguration();

         config.setAllowCredentials( true );

         config.addAllowedOriginPattern( "*" );

         config.addAllowedHeader( "*" );

         config.addAllowedMethod( "*" );

         UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();

         source.registerCorsConfiguration( "/**" , config);

         FilterRegistrationBean bean = new FilterRegistrationBean( new CorsFilter(source));

         //这里设置优先级最高

         bean.setOrder(Ordered.HIGHEST_PRECEDENCE);

         return bean;

     }

}