Spring and Hibernate Application with Zero XML

The Spring framework came up with annotation support since 2.5 version which eases development.

Whether the annotation based approach, or XML approach is better, is depends on the project and your personal preference. Let us see how we can write a Simple Application using Spring and Hibernate using annotations, no xml at all.

The configuration for JDBC datasource and Hibernate properties:

application.properties

################### JDBC Configuration ##########################

jdbc.driverClassName=org.hsqldb.jdbcDriver

jdbc.url=jdbc:hsqldb:file:db/SivaLabsDB;shutdown=true

jdbc.username=sa

jdbc.password=

################### Hibernate Configuration ##########################

hibernate.dialect=org.hibernate.dialect.HSQLDialect

hibernate.show_sql=true

hibernate.hbm2ddl.auto=update

hibernate.generate_statistics=true

We can instantiate ApplicationContext from a Java file using the @Configuration annotation.

AppConfig.java

package com.sivalabs.springmvc.config;

import org.springframework.beans.factory.config.PropertyPlaceholderConfigurer;

import org.springframework.context.annotation.Bean;

import org.springframework.context.annotation.Configuration;

import org.springframework.context.annotation.Import;

import org.springframework.core.io.ClassPathResource;

/**

 * @author SivaLabs

 *

 */

@Import({RepositoryConfig.class})

@Configuration

public class AppConfig

{

    //<context:property-placeholder location="classpath:application.properties"></context:property-placeholder>

    @Bean

    public PropertyPlaceholderConfigurer getPropertyPlaceholderConfigurer()

    {

        PropertyPlaceholderConfigurer ppc = new PropertyPlaceholderConfigurer();

        ppc.setLocation(new ClassPathResource("application.properties"));

        ppc.setIgnoreUnresolvablePlaceholders(true);

        return ppc;

    }

}

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