configuration files in spring boot

[eugene malcolumn]

package com.jverstry.Configuration;

import java.util.Properties;
import org.springframework.beans.factory.DisposableBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.dao.annotation.PersistenceExceptionTranslationPostProcessor;
import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
import org.springframework.jdbc.datasource.embedded.EmbeddedDatabase;
import org.springframework.jdbc.datasource.embedded.EmbeddedDatabaseBuilder;
import org.springframework.jdbc.datasource.embedded.EmbeddedDatabaseType;
import org.springframework.orm.jpa.JpaTransactionManager;
import org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean;
import org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter;
import org.springframework.transaction.PlatformTransactionManager;
import org.springframework.transaction.annotation.EnableTransactionManagement;

@Configuration
@EnableJpaRepositories(basePackages={"com.jverstry"})
@EnableTransactionManagement
public class JpaConfig implements DisposableBean {
   
    private EmbeddedDatabase ed;
    
    @Bean(name="hsqlInMemory")
	public EmbeddedDatabase hsqlInMemory() {
        
        if ( this.ed == null ) {
            EmbeddedDatabaseBuilder builder = new EmbeddedDatabaseBuilder();
            this.ed = builder.setType(EmbeddedDatabaseType.HSQL).build();
        }
        
        return this.ed;
        
	}
    
    @Bean
    public LocalContainerEntityManagerFactoryBean entityManagerFactory(){
      
	    LocalContainerEntityManagerFactoryBean lcemfb
            = new LocalContainerEntityManagerFactoryBean();
	   
        lcemfb.setDataSource(this.hsqlInMemory());
        lcemfb.setPackagesToScan(new String[] {"com.jverstry"});
		lcemfb.setPersistenceUnitName("MyPU");
      
        HibernateJpaVendorAdapter va = new HibernateJpaVendorAdapter();
		lcemfb.setJpaVendorAdapter(va);
		
		Properties ps = new Properties();
		ps.put("hibernate.dialect", "org.hibernate.dialect.HSQLDialect");
		ps.put("hibernate.hbm2ddl.auto", "create");
		lcemfb.setJpaProperties(ps);
		
		lcemfb.afterPropertiesSet();

        return lcemfb;
		
    }
   
    @Bean
    public PlatformTransactionManager transactionManager(){
	   
        JpaTransactionManager tm = new JpaTransactionManager();
      
	    tm.setEntityManagerFactory(
            this.entityManagerFactory().getObject() );
      
        return tm;
		
    }
   
    @Bean
    public PersistenceExceptionTranslationPostProcessor exceptionTranslation(){
        return new PersistenceExceptionTranslationPostProcessor();
    }
    
    @Override
    public void destroy() {

        if ( this.ed != null ) {
            this.ed.shutdown();
        }

    }
    
}

package com.jverstry.Configuration;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.ViewResolver;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
import org.springframework.web.servlet.view.InternalResourceViewResolver;

@EnableWebMvc
@Configuration
@ComponentScan(basePackages = "com.jverstry")
public class WebConfig extends WebMvcConfigurerAdapter {

	@Bean
	public ViewResolver getViewResolver() {
		
		InternalResourceViewResolver resolver = new InternalResourceViewResolver();
		resolver.setPrefix("WEB-INF/pages/");
		resolver.setSuffix(".jsp");

		return resolver;
		
	}
    
	@Override
	public void addResourceHandlers(ResourceHandlerRegistry registry) {
		
		registry
			.addResourceHandler("/resources/**")
			.addResourceLocations("/resources/");		
		
	}
    
}

.
These are the types of files we require when we dont use spring-boot.
do we require them when we use spring -boot..
if these files are alraedy arranged by boot then where is the location?

[Jesper de Jong]

Spring Boot already automatically configures many things.

You can use normal Spring @Configuration classes with Spring Boot, but it's often easier to specify the necessary configuration properties in the file application.properties; you then don't need these @Configuration classes at all.

Appendix A of the Spring Boot reference manual lists many of the properties that you can set in application.properties.