Update README.md

Author: Bikraji

README.md

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-# Spring Framework 5.x Tutorial
+# Spring Framework 5.x Tutorial - [Jstobigdata.com](https://jstobigdata.com/)
+
+## Spring Core Tutorial
+The following Spring Core Topics are covered.
+
+1. [A high-level introduction to Spring Framework](https://jstobigdata.com/spring/a-high-level-introduction-to-spring-framework/)
+2. [Inversion of Control and Dependency Injection in Spring](https://jstobigdata.com/spring/inversion-of-control-and-dependency-injection-in-spring/)
+3. [Spring Bean Scopes – @Scope annotation](https://jstobigdata.com/spring/spring-bean-scopes-scope-annotation/)
+4. [Mapping and Injecting Collections in Spring](https://jstobigdata.com/spring/mapping-and-injecting-collections-in-spring/)
+5. [Spring bean Lifecycle Callbacks](https://jstobigdata.com/spring/spring-bean-lifecycle-callbacks/)
+6. [Spring bean definition Inheritance](https://jstobigdata.com/spring/spring-bean-definition-inheritance/)
+7. [Spring BeanPostProcessor to customize beans](https://jstobigdata.com/spring/spring-beanpostprocessor-to-customize-beans/)
+8. [Dependency Injection: @Autowired, @Resource and @Inject](https://jstobigdata.com/spring/dependency-injection-autowired-resource-and-inject/)
+9. [Fine-tune auto wiring using @Primary and @Qualifier](https://jstobigdata.com/spring/fine-tune-auto-wiring-using-primary-and-qualifier/)
+10. [IoC Container, Bean Factory vs Application Context in Spring](https://jstobigdata.com/spring/ioc-container-application-context-vs-bean-factory-in-spring/)
+11. [Managed beans using @Component, @Repository, @Service](https://jstobigdata.com/spring/managed-components-in-spring-component-repository-service/)
+12. [Classpath Scanning using @ComponentScan and Filters](https://jstobigdata.com/spring/classpath-scanning-using-componentscan-and-filters/)
+13. [Spring @PropertySource to read property files](https://jstobigdata.com/spring/spring-propertysource-to-read-property-files/)
+14. [Profiles in Spring to register beans conditionally](https://jstobigdata.com/spring/profiles-in-spring-to-register-beans-conditionally/)
+15. [Custom Events and Generic Events in Spring](https://jstobigdata.com/spring/custom-events-and-generic-events-in-spring/)