spring boot rest api

1. http://websystique.com/spring-boot/spring-boot-rest-api-example/
2. https://www.codesandnotes.be/2014/10/31/restful-authentication-using-spring-security-on-spring-boot-and-jquery-as-a-web-client/
3. https://stackoverflow.com/questions/38974428/jquery-alerts-undefined-on-error-instead-of-java-spring-exception-details
4. https://stackoverflow.com/questions/7952154/spring-resttemplate-how-to-enable-full-debugging-logging-of-requests-responses
5.