Hibernate 系列教程15-一级缓存

Product

public class Product {
  private Long id;
  private String name;

Product.hbm.xml

<class name="Product">
    <id name="id">
        <generator class="native" />
    </id>
    <property name="name" />
</class>

MainTest

public class MainTest {
 @Before
 public void save() throws Exception {
   Product product = new Product();
   product.setName("jege");

   Session session = HibernateUtils.INSTANCE.getSession();
   session.beginTransaction();
   session.save(product);
   session.getTransaction().commit();
   session.close();
 }

 // 模拟同一个session获取同一个OID对象
 // 只发出一条sql：一级缓存命中
 @Test
 public void get() throws Exception {
   Session session = HibernateUtils.getSession();
   Product product1 = (Product) session.get(Product.class, 1L);
   Product product2 = (Product) session.get(Product.class, 1L);
   session.close();
 }
}

源码地址

https://github.com/je-ge/hibernate

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