I have followed a guide for creating simple spring boot app with JPA and when application was completed it should have created database connection based on configuration from application.properties file, however it didn't happen (I get Not an managed type exceptions). I know this is issuse with application.properties file because app runs correctly when I configure it manually like here.
Project structure: 
POM.xml:
<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> <groupId>demo.tomek</groupId> <artifactId>SpringMVC</artifactId> <version>0.0.1-SNAPSHOT</version> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>1.3.5.RELEASE</version> </parent> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-thymeleaf</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-jpa</artifactId> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> </dependency> <dependency> <groupId>org.hibernate</groupId> <artifactId>hibernate-core</artifactId> </dependency> <dependency> <groupId>org.hibernate</groupId> <artifactId>hibernate-entitymanager</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> </dependency> </dependencies> <properties> <java.version>1.8</java.version> <maven.compiler.source>1.8</maven.compiler.source> <maven.compiler.target>1.8</maven.compiler.target> </properties> <repositories> <repository> <id>spring-releases</id> <name>Spring Releases</name> <url>https://repo.spring.io/libs-release</url> </repository> </repositories> <pluginRepositories> <pluginRepository> <id>spring-releases</id> <url>https://repo.spring.io/libs-release</url> </pluginRepository> </pluginRepositories> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <version>2.1</version> <configuration> <source>1.8</source> <target>1.8</target> </configuration> </plugin> </plugins> </build> application.properties file:
spring.datasource.url = jdbc:mysql://localhost:3306/TEST?createIfNotExists=true spring.datasource.driverClassName = com.mysql.jdbc.Driver spring.datasource.username=root spring.datasource.password=but spring.jpa.show-sql=true # Enable spring data repos spring.data.jpa.repositories.enabled=true spring.jpa.database-platform=org.hibernate.dialect.MySQL5Dialect spring.jpa.hibernate.ddl-auto=update spring.thymeleaf.cache=false spring.template.cache=false static void main()
@SpringBootApplication @ComponentScan("demo") @EnableJpaRepositories("demo") public class SpringBootTEST { public static void main(String[] args) { ApplicationContext ctx = SpringApplication.run(SpringBootTEST.class, args); ProductService pRepo = ctx.getBean("productService", ProductService.class); pRepo.addSomeProducts(); CustomerService cRepo = ctx.getBean("customerService", CustomerService.class); cRepo.addSomeCustomers(); } } Let me stress it again: everything works fine when I configure it manually like here: http://www.baeldung.com/2011/12/13/the-persistence-layer-with-spring-3-1-and-jpa/
I run out of ideas...
SpringBootTESTclass to thedemopackage remove all annotation but the@SpringBootApplicationand restart.