Spring boot ajax跨域请求，页面和java服务端的写法

private CorsConfiguration buildConfig() { 
    CorsConfiguration corsConfiguration = new CorsConfiguration(); 
    corsConfiguration.addAllowedOrigin("*"); 
    corsConfiguration.addAllowedHeader("*"); 
    corsConfiguration.addAllowedMethod("*"); 
    return corsConfiguration; 

} 

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