In this blog, I will explain how to use one-to-many mapping in Spring boot Application What you need? JAVA MySql Eclipse IDE ( whatever you like IDE, I'm using Eclipse for this example) Maven ( you can use the Gradle as well) Initial Plan I will create a spring boot application project using the Spring Initializer web tool and import the project as a maven project. after configuring the all necessary setting, I will code for one-to-many mapping. Below diagram is the database model diagram which we going to install using the spring boot application. Let's Start to Code. You need to configure the application.properties file for database connections. add the following content to the src/main/resources/application.properties spring.datasource.url=jdbc:mysql://localhost:3306/learning spring.datasource.username=root spring.datasource.password=root spring.jpa.properties.hibernate.dialect = org.hibernate.dialect.MySQL5InnoDBDialect spring.jpa.hib...