SpringBoot应用设置允许跨域访问

方式一：添加全局跨域配置类

@Configuration
public class GlobalCorsConfig {

    private CorsConfiguration addCorsConfig() {
        CorsConfiguration corsConfiguration = new CorsConfiguration();
        //请求常用的三种配置，*代表允许所有，当时你也可以自定义属性（比如header只能带什么，只能是post方式等等）
        corsConfiguration.addAllowedOrigin("*");
        corsConfiguration.addAllowedHeader("*");
        corsConfiguration.addAllowedMethod("*");
        return corsConfiguration;
    }

    @Bean
    public CorsFilter corsFilter() {
        UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
        source.registerCorsConfiguration("/**", addCorsConfig());
        return new CorsFilter(source);
    }
}

方式二：在controller类上添加@CrossOrigin注解

@Controller
@CrossOrigin
public class WebController {

}