Spring Boot连接到Heroku上的Postgres数据库

Question

I've been playing around with a Spring Boot app deployed on Heroku but I've stumbled upon an error that I can't seem to find a solution.

I'm trying to connect to a Postgres database following the Heroku tutorial ( link ) but I get this error over and over again:

Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: 
Failed to instantiate [javax.sql.DataSource]:
Factory method 'dataSource' threw exception; nested exception is java.lang.IllegalStateException: No supported DataSource type found

Here's the config file I'm using:

spring.datasource.url=${JDBC_DATABASE_URL}
spring.datasource.driverClassName=org.postgresql.Driver
spring.datasource.username=username
spring.datasource.password=password
spring.datasource.removeAbandoned=true

And the DatabaseConfig class:

@Configuration
public class DatabaseConfig {
    @Bean @Primary
    @ConfigurationProperties(prefix = "spring.datasource")
    public DataSource dataSource() {
        return DataSourceBuilder.create()
                .build();
    }
}

Can anyone point me in the right direction. What am I doing wrong?

Answer 1

I encountered this same exact issue and managed to solve it. The issue is not specific to Heroku, because it can be reproduced by running the app locally as well using the same configuration.

According to the stacktrace it is clear that a DataSource has not been found in the class path. According to Spring Boot documentation, found here , you can either use spring-boot-starter-jdbc or spring-boot-starter-data-jpa to automatically get tomcat-jdbc , which appears to be the preferred one in Spring Boot.

I added the following dependency to pom.xml, which solved the problem:

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