Hibernate4

Hibernate4.3.10环境搭建1、新建一个java项目并且新建一个lib的包2、把hibernate’所需要的jar包放到lib下面还有数据库驱动包（mysql-connector-java-5.1.13-bin.jar）3、编写hibernate配置文件（hibernate.cfg.xml）<!DOCTYPE hibernate-configuration PUBLIC"-//Hibernate/Hibernate Configuration DTD 3.0//EN" "/dtd/hibernate-configuration-3.0.dtd"> <hibernate-configuration><session-factory><!--配置数据库驱动--><property name="connection.driver_class">com.mysql.jdbc.Driver</property><!--配置数据源localhost指当前主机3306是数据库服务器的端口号ch10是数据库名称--><property name="connection.url">jdbc:mysql://localhost:3306/ch10</property><!--数据库用户名--><property name="ername">root</property><!--用户密码--><property name="connection.password">root</property><!--数据库方言--><property name="dialect">org.hibernate.dialect.MySQLDialect</property><!--自动创建表，第一次创建以后更新--><property name="hbm2ddl.auto">update</property><property name="javax.persistence.validation.mode">none</property><!--持久化类的映射文件--><mapping resource="com/boy/hibernate/domain/User.hbm.xml" /></session-factory></hibernate-configuration>4、编写持久化类数据库结构是这样的（user.sql）持久化类（User.java）packagecom.boy.hibernate.domain; importjava.io.Serializable;public class User implements Serializable { privateint id;private String username;private String password;private String realname;privateint age;private String sex;private String address;publicintgetId() {return id;}public void setId(int id) {this.id = id;}public String getUsername() {return username;}public void setUsername(String username) { ername = username;}public String getPassword() {return password;}public void setPassword(String password) { this.password = password;}public String getRealname() {returnrealname;}public void setRealname(String realname) { this.realname = realname;}publicintgetAge() {return age;}public void setAge(int age) {this.age = age;}public String getSex() {return sex;}public void setSex(String sex) {this.sex = sex;}public String getAddress() {return address;}public void setAddress(String address) {this.address = address;}}5、编写持久化类映射文件（User.hbm.xml）<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE hibernate-mapping PUBLIC"-//Hibernate/Hibernate Mapping DTD 3.0//EN""/dtd/hibernate-mapping-3.0.dtd"> <hibernate-mapping><!-- name为持久化类的全名table是表名catlog指定数据库--><class name="er" table="user" catalog="ch10"> <!--对应User的id 将id设为主键generator是主键生成器--><id name="id"><generator class="native"></generator></id><!--对应User的username 长度为20 --><property name="username" length="20"></property><!--对应User的password 长度为20 --><property name="password" length="20"></property><!--对应User的realname长度为20 --><property name="realname" length="20"></property><property name="age" ></property><property name="sex" length="2"></property><property name="address" length="100"></property></class></hibernate-mapping>6、编写hibernate工具类（HibernateSessionFactory.java）mon;importorg.hibernate.Session;importorg.hibernate.SessionFactory;importorg.hibernate.cfg.Configuration;importorg.hibernate.service.ServiceRegistry;importorg.hibernate.service.ServiceRegistryBuilder;importcom.boy.hibernate.exception.HibernateInitException;public class HibernateSessionFactory {//指定要读取的配置文件private static final String CONFIG_FILE_LOCATION = "/Hibernate.cfg.xml";//实例化ThreadLocalprivate static final ThreadLocal<Session> THREAD_LOCAL = newThreadLocal<Session>();//初始化configurationprivate static Configuration configuration = new Configuration();//定义一个sessionFactory；private static SessionFactorysessionFactory;//定义config并赋值private static String config = CONFIG_FILE_LOCATION;static {try{configuration.configure(config);//初始化sessionFactoryServiceRegistryserviceRegistry = new ServiceRegistryBuilder().applySettings(configuration.getProperties()).buildServiceRegistry();sessionFactory = configuration.buildSessionFactory(serviceRegistry);}catch(Exception e){throw new HibernateInitException("hibernate initializtion error");}}//无参构造函数privateHibernateSessionFactory(){};//public static Session getSession(){Session session = THREAD_LOCAL.get();//是否已经存在session对象if(session == null || !session.isOpen()){if(sessionFactory== null){rebuildSessionFactory();}session = (sessionFactory != null) ? sessionFactory.openSession() : null;THREAD_LOCAL.set(session);}return session;}//创建sessionFactoryprivate static void rebuildSessionFactory() {try{configuration.configure(config);//初始化sessionFactoryServiceRegistryserviceRegistry = new ServiceRegistryBuilder().applySettings(configuration.getProperties()).buildServiceRegistry();sessionFactory = configuration.buildSessionFactory(serviceRegistry);}catch(Exception e){throw new HibernateInitException("hibernate initializtion error");}}//关闭sessionpublic static void closeSession(){Session session = THREAD_LOCAL.get();THREAD_LOCAL.set(null);if(session!=null)session.close();}//获取sessionFactorypublic static SessionFactorygetSessionFactory(){ returnsessionFactory;}//获取configurationpublic static Configuration getConfiguration(){ return configuration;}public static void setConfiguration(String cfg){ HibernateSessionFactory.config=cfg;sessionFactory = null;}}7、编写dao（UserDao.java）packagecom.boy.hibernate.dao;importjava.util.ArrayList;importjava.util.List;importorg.hibernate.Session;importorg.hibernate.Transaction;mon.HibernateSessionFactory; er;importcom.boy.hibernate.exception.DaoException;public class UserDao {//添加用户的方法publicint save( User user){int state = 0;Session session = null;Transaction transaction = null;try{session = HibernateSessionFactory.getSession();transaction = session.beginTransaction();state = Integer.parseInt(session.save(user).toString());mit();}catch(Exception e){state = 0;e.printStackTrace();throw new DaoException("fail to save");}finally{HibernateSessionFactory.closeSession();}return state;}//获取所有用户public List<User>getUserList(){List<User> users = new ArrayList<User>();Session session = null;try{session = HibernateSessionFactory.getSession();users = session.createQuery("from User order by id").list();}catch(Exception e){throw new DaoException("fail to query");}finally{HibernateSessionFactory.closeSession();}return users;}}8、导入Junit测试类用到的包右击项目>>Build Path>>Add Libraries.. 然后选择Junit4即可9、编写测试类（HibernateTest.java）packagecom.boy.web.test;importorg.hibernate.Session;importorg.junit.Test;mon.HibernateSessionFactory; er;public class HibernateTest {@Testpublic void createTable(){Session session = HibernateSessionFactory.getSession();User user = new User();session.beginTransaction();session.getTransaction().commit();HibernateSessionFactory.closeSession();}@Testpublic void save(){Session session = HibernateSessionFactory.getSession();User user = new User();session.beginTransaction();user.setUsername("麦女孩的小货车");user.setPassword("12345");user.setAge(23);user.setRealname("麦女孩");user.setSex("女");user.setAddress("很遥远");session.save(user);session.getTransaction().commit();HibernateSessionFactory.closeSession();}}测试1、首先查看数据库是否存在ch10的数据库这下还没有，先新建一个ch10 的数据库确定里面没有任何表单空空如也如果测试成功会看到一条绿色的长条这下再次查看数据库就会自动创建好了一个表再向数据库插入一条数据，如果插入了就说明Hibernate环境配置成功按照上面的方法对save测试数据库的数据插入是否成功测试通过再查看数据库数据插入成功。