Spring Boot + Spring data JPA + MySQL

The previous Spring Boot + Spring data JPA will be reused, modify to support MySQL database.

Technologies used :

• Spring Boot 2.1.2.RELEASE
• Spring 5.1.4.RELEASE
• Hibernate 5.3.7
• HikariCP 3.2.0
• mysql-connector-java:jar 8.0.13
• Maven 3
• Java 8

1. Maven

To connect a MySQL, declares mysql-connector-java

pom.xml

	<dependency>
		<groupId>mysql</groupId>
		<artifactId>mysql-connector-java</artifactId>
	</dependency>

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 
		 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <artifactId>spring-boot-data-jpa</artifactId>
    <packaging>jar</packaging>
    <name>Spring Boot Spring Data JPA</name>
    <version>1.0</version>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.2.RELEASE</version>
    </parent>

    <properties>
        <java.version>1.8</java.version>
        <downloadSources>true</downloadSources>
        <downloadJavadocs>true</downloadJavadocs>
    </properties>

    <dependencies>

        <!-- jpa, crud repository -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>
        
        <!-- MySQL -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>

    </dependencies>

    <build>
        <plugins>

            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>

            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-surefire-plugin</artifactId>
                <version>2.22.0</version>
            </plugin>

        </plugins>

    </build>
</project>

2. Configure MySQL

2.1 Update the MySQL setting in spring.datasource.*

application.properties

## MySQL
spring.datasource.url=jdbc:mysql://localhost:3306/wordpress
spring.datasource.username=favtuts
spring.datasource.password=password

#`hibernate_sequence' doesn't exist
spring.jpa.hibernate.use-new-id-generator-mappings=false

# drop n create table, good for testing, comment this in production
spring.jpa.hibernate.ddl-auto=create

Done.

Download Source Code

$ git clone https://github.com/favtuts/java-spring-boot-tutorials.git
$ cd spring-data-jpa-mysql
$ mvn spring-boot:run

References

• HikariCP
• Spring Data JPA docs
• Working with SQL Databases
• Common application properties
• Accessing data with MySQL