Spring Boot is built on the top of the spring and contains all the features of spring. Spring also provides JPA and hibernate to increase the data manipulation efficiency between the spring application and the database. In very simple terms we can say JPA (Java persistence api) is like an interface and the hibernate is the implementation of the methods of the interface Like how insertion will be down is already defined with the help of hibernating. In this article, we will discuss One-to-Many Mapping in the Hibernate. Let’ understand the One to many mapping with the help of a real-life example. Bike manufacture can manufacture multiple models of the bike but the same bike model cannot be manufactured by multiple manufactures.
This mappedvariable of the other tables is responsible for mapping between two tables.
Spring Initializer is a web-based tool using which we can easily generate the structure of the Spring Boot project. It also provides various different features for the projects expressed in a metadata model. This model allows us to configure the list of dependencies that are supported by JVM. Here, we will create the structure of an application using a spring initializer.
Step 1: Go to this link. Fill in the details as per the requirements. For this application:
Spring Boot: 2.5.7
Dependencies: Spring Web,Spring Data JPA, MySql Driver
Click on Generate which will download the starter project.
Step 2: Extract the zip file. Now open a suitable IDE and then go to File > New > Project from existing sources > Spring-boot-app and select pom.xml. Click on import changes on prompt and wait for the project to sync as pictorially depicted below as follows:
One to Many Mapping
Step 3: Adding the necessary properties in the application.properties file. (mapping is the database name)
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