@Service
@Transactional
public class ProductService {
@PersistenceContext
private EntityManager entityManager;
public void saveProduct(Product product) {
entityManager.persist(product);
}
public void updateProduct(Product product) {
entityManager.merge(product);
}
public void deleteProduct(Long productId) {
Product product = entityManager.find(Product.class, productId);
entityManager.remove(product);
}
public Product getProduct(Long productId) {
return entityManager.find(Product.class, productId);
}
}
<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="url" value="jdbc:mysql://localhost:3306/mydb" />
<property name="username" value="root" />
<property name="password" value="password" />
</bean>
<bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
<property name="entityManagerFactory" ref="entityManagerFactory" />
</bean>
<bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="packagesToScan" value="com.example.model" />
<property name="jpaVendorAdapter">
<bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter" />
</property>
<property name="jpaProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.MySQL8Dialect</prop>
<prop key="hibernate.hbm2ddl.auto">update</prop>
</props>
</property>
</bean>
