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 {
 
        // 當前跨域請求最大有效時長。這里默認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 設置訪問源地址(允許這個網站訪問后臺)
            corsConfiguration.addAllowedHeader("*"); // 2 設置訪問源請求頭
            corsConfiguration.addAllowedMethod("*"); // 3 設置訪問源請求方法
            corsConfiguration.setMaxAge(MAX_AGE);
            source.registerCorsConfiguration("/**", corsConfiguration); // 4 對接口配置跨域設置
            return new CorsFilter(source);
        }
    }