Simple Spring Hibernate App


Open Spring Tool Suite

File -> New -> Spring Template Project

Persistence -> Simple Spring Hibernate Utility Project

Project Name: hibernateExample

Top Level Package: com.skills421.examples.hibernate01

Finish

Modifying the Code to Extend our Simple JDBC App

File -> New -> Class

Package: com.skills421.examples

Name: Person

Now Create a simple POJO called Person as follows:

package com.skills421.examples;

import java.io.Serializable;

public class Person implements Serializable
{
private static final long serialVersionUID = 1L;

private Integer personId;
private String name;
private Integer age;
private Float height;

public Person()
{
}

public Person(String name, Integer age, Float height)
{
this.name = name;
this.age = age;
this.height = height;
}

// getters and setters
}

We want to use ToStringBuilder so let’s add the Apache Commons Lang dependency to the Pom.xml

Whilst we’re at it, let’s also add the Postgres Dependency

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<modelVersion>4.0.0</modelVersion>
<groupId>org.springframework.samples.spring</groupId>
<artifactId>spring-hibernate-utility</artifactId>
<version>1.0.0.CI-SNAPSHOT</version>
<packaging>jar</packaging>
<name>Spring Hibernate Utility</name>
<url>http://www.springframework.org</url>
<description>
<![CDATA[This project is a minimal jar utility with Spring configuration for Hibernate.]]>
</description>
<properties>
<maven.test.failure.ignore>true</maven.test.failure.ignore>
<spring.framework.version>3.0.6.RELEASE</spring.framework.version>
</properties>

<dependencies>

<!-- *** Commons-Lang *** -->
<dependency>
<groupId>commons-lang</groupId>
<artifactId>commons-lang</artifactId>
<version>20030203.000129</version>
</dependency>

<!-- *** Postgres *** -->
<dependency>
<groupId>postgresql</groupId>
<artifactId>postgresql</artifactId>
<version>9.2-1002.jdbc4</version>
</dependency>

<!-- *** Hibernate *** -->
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-entitymanager</artifactId>
<version>3.6.0.Final</version>
</dependency>

<!-- *** JUnit -->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.7</version>
<scope>test</scope>
</dependency>

<!-- *** Spring *** -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>${spring.framework.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context-support</artifactId>
<version>${spring.framework.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aop</artifactId>
<version>${spring.framework.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-orm</artifactId>
<version>${spring.framework.version}</version>
</dependency>

<!-- *** Log4j -->
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.16</version>
</dependency>
</dependencies>

<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>2.3.2</version>
<configuration>
<source>1.5</source>
<target>1.5</target>
</configuration>
</plugin>
</plugins>
</build>

<repositories>
<repository>
<id>org.jboss.repository.releases</id>
<name>JBoss Maven Release Repository</name>
<url>https://repository.jboss.org/nexus/content/repositories/releases</url>
<snapshots>
<enabled>false</enabled>
</snapshots>
</repository>

<!-- *** Postgres Repository *** -->
<repository>
<id>java.net</id>
<url>http://jdbc.postgresql.org/download/postgresql-9.2-1002.jdbc4.jar</url>
</repository>

</repositories>

</project>

Now let’s go back to our POJO and add the Hibernate Annotations and toString method to give us:

package com.skills421.examples;

import java.io.Serializable;

import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;

import org.apache.commons.lang.builder.ToStringBuilder;

@Entity
public class Person implements Serializable
{
private static final long serialVersionUID = 1L;

@Id @GeneratedValue(strategy = GenerationType.SEQUENCE)
private Integer personId;
private String name;
private Integer age;
private Float height;

public Person()
{

}

public Person(String name, Integer age, Float height)
{
this.name = name;
this.age = age;
this.height = height;
}

// getters and setters

public String toString()
{
return new ToStringBuilder(this)
.append(personId)
.append(name)
.append(age)
.append(height)
.toString();
}
}

Now let’s modify the HibernateConfiguration to connect to Postgres, as follows

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