前端跨域问题

package com.sumpreme.oak.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;
​
/**
 * 跨域过滤器配置类   自动运行的
 */
@Configuration
public class CorsConfig {
    @Bean
    public CorsFilter corsFilter(){
​
        CorsConfiguration corsConfiguration = new CorsConfiguration();
​
        // 允许那些域访问
        corsConfiguration.addAllowedOrigin("*");
        //请求头
        corsConfiguration.addAllowedHeader("*");
        //请求头方式 GET POST 等类型
        corsConfiguration.addAllowedMethod("*");
​
        UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
​
        //映射路径
        source.registerCorsConfiguration("/**",corsConfiguration);
        //创建CorsFilter
        return new CorsFilter(source);
​
    }
​
}
​