hibernate 入门案例
1,创建工程,导入jar
ojdbc14.jar 数据库驱动包,我用的是oracle数据库,根据实际的数据库选择驱动包
创建java类,并利用bibernate插件完成orm映射,创建hbm.xml cfg.xml
调整下表名称和主键生成方式
创建测试代码
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1 package com.lxl.it.vo; 2 3 public class Student { 4 private String name; 5 private int age; 6 private int id; 7 public String getName() { 8 return name; 9 } 10 public void setName(String name) { 11 this.name = name; 12 } 13 public int getAge() { 14 return age; 15 } 16 public void setAge(int age) { 17 this.age = age; 18 } 19 public int getId() { 20 return id; 21 } 22 public void setId(int id) { 23 this.id = id; 24 } 25 @Override 26 public String toString() { 27 return "Student [name=" + name + ", age=" + age + ", id=" + id + "]"; 28 } 29 30 }
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1 <?xml version="1.0"?> 2 <!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" 3 "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd"> 4 <!-- Generated 2016-9-5 14:36:05 by Hibernate Tools 3.4.0.CR1 --> 5 <hibernate-mapping> 6 <class name="com.lxl.it.vo.Student" table="STUDENT"> 7 <id name="id" type="int"> 8 <column name="ID"/> 9 <generator class="sequence"> 10 <param name="sequence">SEQ_LXL_TEST</param> 11 </generator> 12 </id> 13 <property generated="never" lazy="false" name="name" type="java.lang.String"> 14 <column name="NAME"/> 15 </property> 16 <property generated="never" lazy="false" name="age" type="int"> 17 <column name="AGE"/> 18 </property> 19 </class> 20 </hibernate-mapping>
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1 <?xml version="1.0" encoding="UTF-8"?> 2 <!DOCTYPE hibernate-configuration PUBLIC 3 "-//Hibernate/Hibernate Configuration DTD 3.0//EN" 4 "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd"> 5 <hibernate-configuration> 6 <session-factory> 7 <property name="hibernate.connection.driver_class">oracle.jdbc.driver.OracleDriver</property> 8 <property name="hibernate.connection.password">bspdev</property> 9 <property name="hibernate.connection.url">jdbc:oracle:thin:@10.202.6.37:1521:bspdev1</property> 10 <property name="hibernate.connection.username">bsp</property> 11 <property name="hibernate.dialect">org.hibernate.dialect.Oracle10gDialect</property> 12 <!-- 执行操作时是否在控制台打印 SQL --> 13 <property name="show_sql">true</property> 14 <!-- 是否对 SQL 进行格式化 --> 15 <property name="format_sql">true</property> 16 <!-- 生成数据表的策略 --> 17 <property name="hbm2ddl.auto">update</property> 18 <!-- 指定自动生成数据表的策略 --> 19 <property name="cache.provider_class">org.hibernate.cache.NoCacheProvider</property> 20 <!-- 指定关联的 .hbm.xml 文件 --> 21 <mapping resource="com/atguigu/hibernate/helloworld/News.hbm.xml"/> 22 <mapping resource="com/lxl/it/vo/Student.hbm.xml"/> 23 </session-factory> 24 </hibernate-configuration>
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1 package com.lxl.it.vo; 2 3 import org.hibernate.Session; 4 import org.hibernate.SessionFactory; 5 import org.hibernate.Transaction; 6 import org.hibernate.cfg.Configuration; 7 import org.hibernate.service.ServiceRegistry; 8 import org.hibernate.service.ServiceRegistryBuilder; 9 import org.junit.After; 10 import org.junit.Before; 11 import org.junit.Test; 12 13 public class StudentTest { 14 private SessionFactory sessionFactory; 15 private Session session; 16 private Transaction transaction; 17 18 @Before 19 public void init() { 20 Configuration configuration = new Configuration().configure(); 21 ServiceRegistry serivceRegistry = new ServiceRegistryBuilder() 22 .applySettings(configuration.getProperties()) 23 .buildServiceRegistry(); 24 sessionFactory=configuration.buildSessionFactory(serivceRegistry); 25 session =sessionFactory.openSession(); 26 transaction=session.beginTransaction(); 27 } 28 @After 29 public void destory(){ 30 transaction.commit(); 31 session.close(); 32 sessionFactory.close(); 33 } 34 @Test 35 public void testSessionCache(){ 36 Student s=(Student)session.get(Student.class, 1); 37 System.out.println(s); 38 Student s2=(Student)session.get(Student.class, 1); 39 System.out.println(s); 40 } 41 42 @Test 43 public void test() { 44 Configuration configuration = new Configuration().configure(); 45 ServiceRegistry serviceRegistry = new ServiceRegistryBuilder() 46 .applySettings(configuration.getProperties()) 47 .buildServiceRegistry(); 48 SessionFactory sessionFactory = configuration 49 .buildSessionFactory(serviceRegistry); 50 Session session = sessionFactory.openSession(); 51 Transaction transcation = session.beginTransaction(); 52 Student s = new Student(); 53 s.setAge(10); 54 s.setName("lxl"); 55 session.save(s); 56 transcation.commit(); 57 session.close(); 58 sessionFactory.close(); 59 } 60 }