Spring Boot auto configuration for datasource

Question

You’re missing several classes (mostly pool related) on your classpath. The easiest solution is to use the Spring boot starter for JPA, which is:

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>

If you do this, you can remove the following dependencies since they’re all part of the starter:

<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-context</artifactId>
    <version>${spring.version}</version>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-tx</artifactId>
    <version>${spring.version}</version>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-orm</artifactId>
    <version>${spring.version}</version>
</dependency>
<dependency>
    <groupId>org.springframework.data</groupId>
    <artifactId>spring-data-jpa</artifactId>
    <version>${spring.data.version}</version>
</dependency>

<dependency>
    <groupId>org.hibernate</groupId>
    <artifactId>hibernate-core</artifactId>
    <version>${hibernate.version}</version>
</dependency>

The alternative solution is to manually add a pool provider to your classpath, the default of spring-boot-starter-data-jpa is tomcat-jdbc (Hikari for Spring boot 2.x) but you can use any connection pool provider you want that is listed in the documentation.

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