【后端开发】后端跨域

package com.example.demo.config;

import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.CorsRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;

/**
 * 后端实现跨域请求
 */
@Configuration
public class CorsConfig implements WebMvcConfigurer {

    @Override
    public void addCorsMappings(CorsRegistry registry) {
        registry.addMapping("/**")
                .allowedOrigins("*")
                .allowCredentials(false)
                .allowedMethods("*")
                .allowedHeaders("*");

    }
}

//
//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;
///**
// * 实现基本的跨域请求
// * @author linhongcun
// *
// */
//@Configuration
//public class CorsConfig {
//    @Bean
//    public CorsFilter corsFilter() {
//        final UrlBasedCorsConfigurationSource urlBasedCorsConfigurationSource = new UrlBasedCorsConfigurationSource();
//        final CorsConfiguration corsConfiguration = new CorsConfiguration();
//        /*是否允许请求带有验证信息*/
//        corsConfiguration.setAllowCredentials(true);
//        /*允许访问的客户端域名*/
//        corsConfiguration.addAllowedOrigin("*");
//        /*允许服务端访问的客户端请求头*/
//        corsConfiguration.addAllowedHeader("*");
//        /*允许访问的方法名,GET POST等*/
//        corsConfiguration.addAllowedMethod("*");
//        urlBasedCorsConfigurationSource.registerCorsConfiguration("/**", corsConfiguration);
//        return new CorsFilter(urlBasedCorsConfigurationSource);
//    }
//}