how to simply add cross origin in spring boot code example

Example 1: spring cors

public WebMvcConfigurer corsConfigurer() {
		return new WebMvcConfigurer() {
			@Override
			public void addCorsMappings(CorsRegistry registry) {
				registry.addMapping("/greeting-javaconfig").allowedOrigins("http://localhost:9000");
			}
		};
	}Copy

Example 2: cors filter spring boot not working in the tomcat web application

<filter>
        <filter-name>cors</filter-name>
        <filter-class>com.udalmik.filter.CorsFilter</filter-class>
    </filter>

    <filter-mapping>
        <filter-name>cors</filter-name>
        <url-pattern>/register</url-pattern>
    </filter-mapping>