Introduction to spring boot
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This document provides an overview of developing a web application using Spring Boot that connects to a MySQL database. It discusses setting up the development environment, the benefits of Spring Boot, basic project structure, integrating Spring MVC and JPA/Hibernate for database access. Code examples and links are provided to help get started with a Spring Boot application that reads from a MySQL database and displays the employee data on a web page.
Introduction to spring boot
- 1. Santosh Kumar Kar, Lead Software Engineer, EPAM [email protected]
- 2. Before we start A task for you – time 15 minutes Develop a web application which reads Employee information from MySQL DB and print on the screen. You need to use Spring and Hibenate(JPA). It should run in any web container.
- 3. List out the challenges you have faced while setting up the env. 1) Download and set up a server (e.g. Tomcat) 2) Download and install a DB 3) Download required Spring jars 4) Download Hibernate jar compatible with the Spring version 5) Download jar for MySQL driver 6) Setting up web.xml to use spring MVC 7) Anything I left ??? Before we start
- 4. Why Spring Boot • Provides a radically faster and widely accessible ‘getting started’ experience for all Spring development • No clumsy XML Configuration by developers • Provide opinionated ‘starter’ POMs to simplify your Maven configuration • Uses project management tool such as MAVEN or GRADLE • Helps fast development and production ready code • Embed Tomcat, Jetty or Undertow directly (no need to deploy WAR files) • In memory DB
- 6. System Requirement Spring Boot 1.4.2.RELEASE • Apache Maven • Java 7 +
- 7. http://start.spring.io – a good starting point
- 8. Folder Structure to be followed
- 11. First Java Program for spring boot
- 12. Running the application > mvn spring-boot:run
- 13. Devtools • Automatic Restart • LiveReload • Remote Debug Tunneling • Remote Update and Restart Details at: http://docs.spring.io/spring-boot/docs/current/reference/html/using-boot-devtools.html
- 14. Spring Tool Suite (sts) Download https://spring.io/tools/sts/all
- 15. Spring Web & MVC application.properties pom.xml
- 17. Runnable war 1) In Main java file: 1.1 extend : org.springframework.boot.web.support.SpringBootServletInitializer 1.2 override the method: @Override protected SpringApplicationBuilder configure(SpringApplicationBuilder application) { return application.sources(MyApplication.class); } 1.3 No need of main() method. 2) In pom.xml 1.1 Change the packing to war as: <packaging>war</packaging> 3) Use command: mvn clean package 4) In target, rename the war<context root> as you want, deploy in tomcat and access with <context root>/<request mapping>
- 18. MySQL & jdbc pom.xml spring.datasource.jndi-name=java:jboss/datasources/customers - For JNDI Datasource
- 19. MySQL & jdbc
- 20. JPA in Spring Boot
- 21. JPA in Spring Boot
- 22. JPA in Spring Boot
- 23. JPA in Spring Boot Things to learn: Only interface is enough which inherits to CrudRepository. The implementation will be provided by spring. To know the other inherited methods, please go through the CrudRepository API.
- 24. JPA in Spring Boot