Storing an unsalted password hash is not recommended. This is a simplified structure and only has a minimum number of columns. I will be using a simplified version of a USERS table that stores login information for each registered user to a site. The good news is that there is an easy way of mapping the Java UUID column to MySQL using Hibernate and no additional libraries are needed.įirst, let’s look at the sample table. When using an UUID, this can pose some tricks, depending on the configuration and MySQL version. I won’t be covering the auto-incremented method since it poses no real problems and can be mapped to an Integer in the Java domain class. The most common methods are to use an auto-incremented column or a generated UUID. Import .When creating the database structure it is important to make sure that each row in a table has a unique ID so that it can be easily indexed, retrieved, and manipulated when needed. It will be responsible for transforming CRUD operations to SQL queries to execute against the database.Ĭreate a package called repositories then create a file TaskRepository.java and add the code below: The JPA repository for an entity act as the interface between our application entity and the database. Note: set the value of the property -auto to validate after the tables are created to prevent them from being deleted and then re-created when starting the application Create the JPA repository Run the application with the command mvn spring-boot:run it will start at port 8000. =jdbc:mysql://localhost:3307/taskdb?serverTimezone=UTC&allowPublicKeyRetrieval=true&useSSL=false open the application configuration file src/resources/application.properties and add the code below: Let's configure the application to connect to the database and perform database table creation (Hibernate under the hood). Getter, setter and toString() methods here.īelow is the code of the enumeration TaskStatusEnum. Private Date = false, name = "created_at") Private String String = false, columnDefinition = "varchar(20) not null default TaskStatusEnum = "due_date") Private Integer = true, length = 200, nullable = false) Hibernate is a dependency used by Spring Data JPA, so you don't need to install it.Ĭreate a package named entities then create a class called Task and add the code below: package We will use Hibernate to define the model of the entities in Java, and it will create the SQL-related queries for DDL and DML. Generate a new Spring Boot projectĬlick on the button "Generate" to download the project and open it in your IDE. Using the first method, go to the URL to generate a new project. MySQL Driver for Java: the MySQL driver makes it possible to interact with a database from a java application.The Spring Data JPA: Persist data in SQL stores with Java Persistence API using Spring Data and Hibernate.Uses Apache Tomcat as the default embedded container. The Spring Web: Build web, including RESTful, applications using Spring MVC.I guide you on how to do that in the post below: There is an online project generator to create a Spring Boot project with the required dependencies you can use or create a new project from the IDE IntelliJ. Run the command below to start the Docker container from the MySQL image:ĭocker run -d -e MYSQL_ROOT_PASSWORD=secret -e MYSQL_DATABASE=taskdb -name mysqldb -p 3307:3306 mysql:8.0 We need Docker to run a container for MySQL 8 you can skip it if MySQL is installed on your computer. An HTTP client such as Postman, Insomnia, cURL, etc.You must need these tools installed on your computer to follow this tutorial. The REST API will expose the following endpoints: Endpoint A simple database schema of the application will look like this: The database structure of the task table. Let's say we will build the backend of a task manager that will allow users to manage their things to do. In this post, we will see how to build a REST API using Java and Spring Boot. Today, we use it in various use cases, like a backend API to be consumed by a frontend application, a public API consumed by other clients, etc. 8 min read Photo by Jerry Zhang / UnsplashĪ REST API is an Application Programming Interface that follows the REST architecture constraints.
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