@Configuration
public class CorsConfig implements WebMvcConfigurer {
    static final String[] ORIGINS = new String[] { "GET", "POST", "PUT", "DELETE" };
    @Override
    public void addCorsMappings(CorsRegistry registry) {
        // 所有的當(dāng)前站點(diǎn)的請(qǐng)求地址，都支持跨域訪問。
        registry.addMapping("/**")
                // 所有的外部域都可跨域訪問
                .allowedOrigins("*")
                // 是否支持跨域用戶憑證
                .allowCredentials(true)
                // 當(dāng)前站點(diǎn)支持的跨域請(qǐng)求類型是什么
                .allowedMethods(ORIGINS)
                // 超時(shí)時(shí)長設(shè)置為1小時(shí),時(shí)間單位是秒。
                .maxAge(3600);
    }
}

@Configuration
public class CorsConfig {
    private CorsConfiguration buildConfig() {
        CorsConfiguration corsConfiguration = new CorsConfiguration();
        corsConfiguration.addAllowedOrigin("*");
        corsConfiguration.addAllowedHeader("*");
        corsConfiguration.addAllowedMethod("*");
        corsConfiguration.addExposedHeader("*");
        return corsConfiguration;
    }
    @Bean
    public FilterRegistrationBean<CorsFilter> corsFilter() {
        UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
        // 對(duì)接口配置跨域設(shè)置
        source.registerCorsConfiguration("/**", buildConfig());
        //有多個(gè)filter時(shí)此處設(shè)置改CorsFilter的優(yōu)先執(zhí)行順序
        FilterRegistrationBean<CorsFilter> bean = new FilterRegistrationBean<>(new CorsFilter(source));
        bean.setOrder(Ordered.HIGHEST_PRECEDENCE);
        return bean;
    }
}