Java application can be compiled down to one executable file (ex: .jar, .war). In our case, we will be creating a jar file that will be saved to a directory called target. This can be done from your IDE (ex: Intellij, Eclipse).
$ mvn clean install
$ ls target
< there should be a bunch of files>
classes
generated-sources
generated-test-sources
maven-archiver
maven-status
postgres-demo-0.0.1-SNAPSHOT.jar
postgres-demo-0.0.1-SNAPSHOT.jar.original
surefire-reports
test-classesto run you application from the command line
$ java -jar target/postgres-demo-0.0.1-SNAPSHOT.jar- java 8
- maven
- database (ex: postgres)
- database table
- databese username
You can check this information in the application.
To find the java version, check the pom.xml
$ cat pom.xml
< lots of stuff will be in here>
...
<name>postgres-demo</name>
<description>Demo project for Spring Boot</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.0.1.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
</properties>
...$ cat src/main/resources/application.properties
## Spring DATASOURCE (DataSourceAutoConfiguration & DataSourceProperties)
spring.datasource.url=jdbc:postgresql://localhost:5432/postgres_demo
spring.datasource.username=
spring.datasource.password=
# The SQL dialect makes Hibernate generate better SQL for the chosen database
spring.jpa.properties.hibernate.dialect = org.hibernate.dialect.PostgreSQLDialect
# Hibernate ddl auto (create, create-drop, validate, update)
spring.jpa.hibernate.ddl-auto = updateIn this example, our application uses a postgres database called postgres_demo. There is no username or password defined.
Check out the complete tutorial on the CalliCoder blog -
Spring Boot, PostgreSQL, JPA, Hibernate RESTful CRUD API Example
1. Clone the repository
git clone https://github.com/callicoder/spring-boot-postgresql-jpa-hibernate-rest-api-demo.git2. Configure PostgreSQL
First, create a database named postgres_demo. Then, open src/main/resources/application.properties file and change the spring datasource username and password as per your PostgreSQL installation.
3. Run the app
Type the following command from the root directory of the project to run it -
mvn spring-boot:runAlternatively, you can package the application in the form of a JAR file and then run it like so -
mvn clean package
java -jar target/postgres-demo-0.0.1-SNAPSHOT.jar