1、如果只是一个简单的springboot demo，用以下配置就行
新建config类import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.CorsRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;

/**

• @author yk
• @date 2021/7/19 14:36
  /
  @Configuration
  public class WebConfig implements WebMvcConfigurer {
  @Override
  public void addCorsMappings(CorsRegistry registry) {
  registry.addMapping("/**")
  .allowedOriginPatterns("")
  .allowedMethods("*")
  .maxAge(3600)
  .allowCredentials(true);
  }
  }2、但是实际开发中我们需要结合，spring-security、oauth2等等，就会发现上面的配置失效了，那是因为前面的Filter优先级太高了，那我们可以采取如下配置import org.springframework.boot.web.servlet.FilterRegistrationBean;
  import org.springframework.context.annotation.Bean;
  import org.springframework.context.annotation.Configuration;
  import org.springframework.core.Ordered;
  import org.springframework.web.cors.CorsConfiguration;
  import org.springframework.web.cors.UrlBasedCorsConfigurationSource;
  import org.springframework.web.filter.CorsFilter;

/**

• @author yk

• @date 2021/7/19 16:21
  */
  @Configuration
  public class CrosConfig {

  @Bean
  public FilterRegistrationBean corsFilter() {
  CorsConfiguration config = new CorsConfiguration();
  config.setAllowCredentials(true);
  config.addAllowedOriginPattern("");
  config.addAllowedHeader("");
  config.addAllowedMethod("*");
  UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
  source.registerCorsConfiguration("/**", config);
  FilterRegistrationBean bean = new FilterRegistrationBean(new CorsFilter(source));
  //这里设置优先级最高
  bean.setOrder(Ordered.HIGHEST_PRECEDENCE);
  return bean;
  }
  }版权声明：本文为博主原创文章，遵循 CC 4.0 BY-SA 版权协议，转载请附上原文出处链接和本声明。
  本文链接：https://blog.csdn.net/qq_38416500/article/details/118905401