12.2

package com.example.cwgl.configs;

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;

@Configuration
public class CorsConfig {//配置类
private CorsConfiguration buildConfig() {
CorsConfiguration corsConfiguration = new CorsConfiguration();
corsConfiguration.addAllowedOrigin(""); // 1允许任何域名使用
corsConfiguration.addAllowedHeader(""); // 2允许任何头
corsConfiguration.addAllowedMethod("*"); // 3允许任何方法（post、get等）
return corsConfiguration;
}

@Bean
public CorsFilter corsFilter() {
    UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
    source.registerCorsConfiguration("/**", buildConfig()); // 4
    return new CorsFilter(source);
}

}