解决前端跨域请求（SpringBoot）

@Configuration
public class CorsConfig {
 
    private CorsConfiguration buildConfig() {
 
        CorsConfiguration corsConfiguration = new CorsConfiguration();
        // 1. 设置访问源地址
        corsConfiguration.addAllowedOrigin("*");
        // 2. 设置访问源请求头
        corsConfiguration.addAllowedHeader("*");
        // 3. 设置访问源请求方法
        corsConfiguration.addAllowedMethod("*");
 
        return corsConfiguration;
    }
 
    @Bean
    public CorsFilter corsFilter() {
 
        UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
        // 4. 对接口配置跨域设置
        source.registerCorsConfiguration("/**", buildConfig());
 
        return new CorsFilter(source);
    }
}