//2.x
    @Bean
    public ConfigurableServletWebServerFactory webServerFactory() {
        TomcatServletWebServerFactory factory = new TomcatServletWebServerFactory();
        factory.addConnectorCustomizers((TomcatConnectorCustomizer) connector -> 
        connector.setProperty("relaxedQueryChars", "|{}[]"));
        return factory;
    }

    //1.x
    @Bean
    public EmbeddedServletContainerFactory webServerFactory() {
        TomcatEmbeddedServletContainerFactory factory = new TomcatEmbeddedServletContainerFactory();
        factory.addConnectorCustomizers(
                (TomcatConnectorCustomizer) connector -> 
                connector.setProperty("relaxedQueryChars", "|{}[]"));
        return factory;
    }