如何在Spring Boot后端服务器上实现跨域请求

采用全局配置，在main/java/example/下的Application启动类中，定义如下Bean，注意不要导错包！

import org.springframework.context.annotation.Bean;
import org.springframework.web.filter.CorsFilter;
import org.springframework.web.cors.UrlBasedCorsConfigurationSource;
import org.springframework.web.cors.CorsConfiguration;





 @Bean
 public CorsFilter corsFilter() {
        UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
        CorsConfiguration corsConfiguration = new CorsConfiguration();
        corsConfiguration.addAllowedOrigin("*");
        corsConfiguration.addAllowedHeader("*");
        corsConfiguration.addAllowedMethod("*");
        source.registerCorsConfiguration("/**", corsConfiguration);
        return new CorsFilter(source);
    }