How to configure Spring without persistence.xml?

Question

I'm trying to set up spring xml configuration without having to create a futher persistence.xml. But I'm constantly getting the following exception, even though I included the database properties in the spring.xml

    Exception in thread "main" org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in file [C:\Users\me\workspace\app\src\main\webapp\WEB-INF\applicationContext.xml]: Invocation of init method failed; nested exception is java.lang.IllegalStateException: No persistence units parsed from {classpath*:META-INF/persistence.xml} 

spring.xml:

  <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">     <property name="driverClassName" value="${jdbc.driverClassName}" />     <property name="url" value="${jdbc.url}" />     <property name="username" value="${jdbc.username}" />     <property name="password" value="${jdbc.password}" />   </bean>      <bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">         <property name="dataSource" ref="dataSource" />      <property name="jpaProperties">          <props>             <prop key="hibernate.dialect">${hibernate.dialect}</prop>             <prop key="hibernate.hbm2ddl.auto">${hibernate.hbm2ddl.auto}</prop>             <prop key="hibernate.show_sql">${hibernate.show_sql}</prop>             <prop key="hibernate.format_sql">${hibernate.format_sql}</prop>          </props>       </property>     </bean> 

What am I missing here?

Answer 1

From Spring Guide Accessing Data with JPA

@Configuration @EnableJpaRepositories public class Application {      @Bean     public DataSource dataSource() {         return new EmbeddedDatabaseBuilder().setType(H2).build();     }      @Bean     public LocalContainerEntityManagerFactoryBean entityManagerFactory(DataSource dataSource, JpaVendorAdapter jpaVendorAdapter) {         LocalContainerEntityManagerFactoryBean lef = new LocalContainerEntityManagerFactoryBean();         lef.setDataSource(dataSource);         lef.setJpaVendorAdapter(jpaVendorAdapter);         lef.setPackagesToScan("hello");         return lef;     }      @Bean     public JpaVendorAdapter jpaVendorAdapter() {         HibernateJpaVendorAdapter hibernateJpaVendorAdapter = new HibernateJpaVendorAdapter();         hibernateJpaVendorAdapter.setShowSql(false);         hibernateJpaVendorAdapter.setGenerateDdl(true);         hibernateJpaVendorAdapter.setDatabase(Database.H2);         return hibernateJpaVendorAdapter;     } 

Spring Boot

With Spring Boot enabled application this is even easier:

Sample application.yaml

spring:     datasource:         url: jdbc:h2:mem:test         username: sa         password: sa         driver-class-name: org.h2.Driver     jpa:         database: H2         show-sql: false         hibernate:             format_sql: true             ddl-auto: auto