解決前端跨域請求（SpringBoot）

@Configuration
public class CorsConfig {

    private CorsConfiguration buildConfig() {

        CorsConfiguration corsConfiguration = new CorsConfiguration();
        // 1. 設置訪問源地址
        corsConfiguration.addAllowedOrigin("*");
        // 2. 設置訪問源請求頭
        corsConfiguration.addAllowedHeader("*");
        // 3. 設置訪問源請求方法
        corsConfiguration.addAllowedMethod("*");

        return corsConfiguration;
    }

    @Bean
    public CorsFilter corsFilter() {

        UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
        // 4. 對接口配置跨域設置
        source.registerCorsConfiguration("/**", buildConfig());

        return new CorsFilter(source);
    }
}