后台配置同源cors解决跨域问题

所谓的同源指：域名、网络协议、端口号相同，三条有一条不同就会产生跨域。下面web建站小编给大家简单介绍一下如何完美解决前后端跨域请求问题！​

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);
  }
}

PS：在SpringBoot2.0 上的跨域可以用以上代码配置~