Springboot如何解决前端请求跨域的问题

package com.zhang.demo.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 {
 
        // 当前跨域请求最大有效时长。这里默认1天
        private static final long MAX_AGE = 24 * 60 * 60;
 
        @Bean
        public CorsFilter corsFilter() {
            UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
            CorsConfiguration corsConfiguration = new CorsConfiguration();
            corsConfiguration.addAllowedOrigin("http://localhost:8080"); // 1 设置访问源地址(允许这个网站访问后台)
            corsConfiguration.addAllowedHeader("*"); // 2 设置访问源请求头
            corsConfiguration.addAllowedMethod("*"); // 3 设置访问源请求方法
            corsConfiguration.setMaxAge(MAX_AGE);
            source.registerCorsConfiguration("/**", corsConfiguration); // 4 对接口配置跨域设置
            return new CorsFilter(source);
        }
    }