Spring Boot Cors筛选器返回访问-控制-允许-起源：null

Question

@Configuration
@EnableWebMvc
public class WebConfig  extends WebMvcConfigurerAdapter{

@Override
public void addCorsMappings(CorsRegistry registry) {
    registry.addMapping("/**");
}

}

我从服务器得到一个200的响应，但是access-control-allog-origin：null。

所以Chrome正在抱怨上面的错误。

尝试在控制器中手动设置标题，但现在我可以看到两个标题具有相同的名称。Chrome再次抱怨多个标题同名。

Answer 1

    registry.addMapping("/trial/**")
        .allowedOrigins("http://localhost") // Add you arigins here ,to bypass all the origins you can put "*".
        .allowedMethods("PUT", "DELETE","POST","GET") // add allowed methods here
        .allowedHeaders("header1", "header2", "header3")// add allowed headers here
        .exposedHeaders("header1", "header2") // add exposed headers here
        .allowCredentials(false).maxAge(3600);

/**
 * Set the origins to allow, e.g. {@code "http://domain1.com"}.
 * <p>The special value {@code "*"} allows all domains.
 * <p>By default this is not set.
 */
public void setAllowedOrigins(@Nullable List<String> allowedOrigins) {
    this.allowedOrigins = (allowedOrigins != null ? new ArrayList<>(allowedOrigins) : null);
}

.allowedOrigins()