Spring Boot报错：java.lang.IllegalArgumentException: An invalid character [..] was present in the Cookie value

原因及解决办法：https://docs.spring.io/spring-boot/docs/2.0.3.RELEASE/reference/htmlsingle/#howto-use-tomcat-legacycookieprocessor

@Configuration
public class CookieConfig {

    /**
     * 解决问题：
     * There was an unexpected error (type=Internal Server Error, status=500).
     * An invalid domain [.localhost.com] was specified for this cookie
     *
     * @return
     */
    @Bean
    public WebServerFactoryCustomizer<TomcatServletWebServerFactory> cookieProcessorCustomizer() {
        return (factory) -> factory.addContextCustomizers(
                (context) -> context.setCookieProcessor(new LegacyCookieProcessor()));
    }
}

补充cookie坑，同一个服务器，前端访问IP地址cookie存在IP地址下，访问域名cookie存在域名下

原文地址：https://www.cnblogs.com/yxmhl/p/12237343.html