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Spring Boot with Thymeleaf tutorial, part 3 – Spring Data JPA

August 9, 2015

In this tutorial I am going to add a possibility of storing added posts in a database. I extend previous project where post form is already implemented. I use H2 in-memory database to simplify project’s complexity. To implement data access layer in the application I use Spring Data JPA.

1. Set up the project as is described in previous post or checkout the source code.

2. Add Maven dependencies to enable Spring Data JPA and H2 database:

<dependency>
	<groupId>org.springframework.boot</groupId>
	<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
	<groupId>com.h2database</groupId>
	<artifactId>h2</artifactId>
</dependency>

<groupId>org.springframework.boot</groupId>

<artifactId>spring-boot-starter-data-jpa</artifactId>

</dependency>

<groupId>com.h2database</groupId>

</dependency>

Spring Boot

Spring Boot with Thymeleaf tutorial, part 2 – Forms with validation

August 2, 2015

In this tutorial I am going to extend previous project and show you how to handle with Forms in Spring Boot and Thymeleaf. I am going to create simple form for post. If post is valid, it will be displayed on the result view.

1. Set up the project as is described in previous post or checkout the source code.

2. pom.xml file is the same like in the previous project. I have only changed name and description.

<?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>

	<groupId>com.jvmhub</groupId>
	<artifactId>spring-boot-thymeleaf-form</artifactId>
	<version>0.0.1</version>
	<packaging>jar</packaging>

	<name>spring-boot-thymeleaf-form</name>
	<description>Spring Boot with Thymeleaf, part 2 - Forms</description>

	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>1.2.5.RELEASE</version>
		<relativePath/> <!-- lookup parent from repository -->
	</parent>

	<properties>
		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
		<java.version>1.8</java.version>
	</properties>

	<dependencies>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-thymeleaf</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>
		</plugins>
	</build>
	

</project>

<?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">

<groupId>com.jvmhub</groupId>

<artifactId>spring-boot-thymeleaf-form</artifactId>

<name>spring-boot-thymeleaf-form</name>

<description>Spring Boot with Thymeleaf, part 2 - Forms</description>

<groupId>org.springframework.boot</groupId>

<artifactId>spring-boot-starter-parent</artifactId>

<version>1.2.5.RELEASE</version>

</parent>

<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>

<java.version>1.8</java.version>

</properties>

<groupId>org.springframework.boot</groupId>

<artifactId>spring-boot-starter-thymeleaf</artifactId>

</dependency>

<groupId>org.springframework.boot</groupId>

<artifactId>spring-boot-starter-test</artifactId>

</dependency>

</dependencies>

<build>

<groupId>org.springframework.boot</groupId>

<artifactId>spring-boot-maven-plugin</artifactId>

</plugin>

</plugins>

</build>

</project>

Spring Boot

Game of Life – web application

July 29, 2015

Hello Everyone!

I would like to present you my implementation of Game of Life -> https://en.wikipedia.org/wiki/Conway%27s_Game_of_Life.

Spring Boot

Spring Boot with Thymeleaf tutorial, part 1

July 19, 2015

In this tutorial I am going to show you how to set up your first project using Spring Boot. I will use Maven and Thymeleaf as a template engine.

1. Create new project using Spring Tool Suite. Click File – New – Spring Starter Project. Fill inputs as in the picture below. Click Next button. If you do not use Spring Tool Suit you can use web version of this generator on http://start.spring.io.

Spring Boot

Hibernate and PostgreSQL configuration using persistence.xml and EntityManager

October 25, 2014

In this tutorial I am going to show you how to use Hibernate with Entity Manager. It is based on my previous tutorial and it is an enhancement of this code. In previous tutorial I was using “hibernate-entitymanager” dependency, so there is no need to do any modifications in pom.xml now.

1. Create persistence.xml file in src/main/resources/META-INF directory. You can also remove hibernate.cfg.xml, but it is not mandatory.

<persistence xmlns="http://java.sun.com/xml/ns/persistence"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd"
	version="2.0">
	<persistence-unit name="entityManager">
		<provider>org.hibernate.ejb.HibernatePersistence</provider>
		<!-- Annotated entity classes -->
        <class>com.jvmhub.tutorial.entity.AppUser</class>
		<properties>

			<property name="hibernate.connection.url" value="jdbc:postgresql://localhost/jvmhubtutorial" />
			<property name="hibernate.connection.driver_class" value="org.postgresql.Driver" />
			<property name="hibernate.connection.username" value="user" />
			<property name="hibernate.connection.password" value="password" />
			
			<property name="hibernate.dialect" value="org.hibernate.dialect.PostgreSQLDialect" />
			<property name="hibernate.hbm2ddl.auto" value="create-drop" />
		</properties>
	</persistence-unit>
</persistence>

<persistence xmlns="http://java.sun.com/xml/ns/persistence"

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd"

version="2.0">

<persistence-unit name="entityManager">

<provider>org.hibernate.ejb.HibernatePersistence</provider>

<class>com.jvmhub.tutorial.entity.AppUser</class>

</properties>

</persistence-unit>

</persistence>

Hibernate

Hibernate and PostgreSQL configuration with Maven

October 22, 2014

In this tutorial I am going to show you how to configure connection between Hibernate and PostgreSQL in Java application using Maven.

I am using:

JDK 1.7.0_72
Apache Maven 3.2.1
PostgreSQL 9.3.5
Hibernate 4.2.15.Final

1. Generate maven project from archetype

mvn archetype:generate -DarchetypeArtifactId=maven-archetype-quickstart 
-DinteractiveMode=false -DgroupId=com.jvmhub.tutorial -DartifactId=01-hibernate-conf

1 2	mvn archetype:generate -DarchetypeArtifactId=maven-archetype-quickstart -DinteractiveMode=false -DgroupId=com.jvmhub.tutorial -DartifactId=01-hibernate-conf

2. Add fallowing dependencies to you pom.xml file

<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/maven-v4_0_0.xsd">
	<modelVersion>4.0.0</modelVersion>
	<groupId>com.jvmhub.tutorial</groupId>
	<artifactId>01-hibernate-conf</artifactId>
	<packaging>jar</packaging>
	<version>1.0-SNAPSHOT</version>
	<name>01-hibernate-conf</name>

	<properties>
		<hibernate.version>4.2.15.Final</hibernate.version>
	</properties>

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

		<!-- The tutorials use the PostgreSQL 9.3.5 database -->
		<dependency>
			<groupId>org.postgresql</groupId>
			<artifactId>postgresql</artifactId>
			<version>9.3-1102-jdbc41</version>
		</dependency>

		<dependency>
			<groupId>junit</groupId>
			<artifactId>junit</artifactId>
			<version>3.8.1</version>
			<scope>test</scope>
		</dependency>
	</dependencies>
</project>

<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/maven-v4_0_0.xsd">

<groupId>com.jvmhub.tutorial</groupId>

<artifactId>01-hibernate-conf</artifactId>

<version>1.0-SNAPSHOT</version>

<name>01-hibernate-conf</name>

<hibernate.version>4.2.15.Final</hibernate.version>

</properties>

<groupId>org.hibernate</groupId>

<artifactId>hibernate-entitymanager</artifactId>

<version>${hibernate.version}</version>

</dependency>

<groupId>org.postgresql</groupId>

<artifactId>postgresql</artifactId>

</dependency>

<groupId>junit</groupId>

<artifactId>junit</artifactId>

</dependency>

</dependencies>

</project>

Hibernate