Hibernate demo之使用xml
1.新建maven项目 testHibernate,pom.xml
<?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>testHiberate</groupId> <artifactId>testHiberate</artifactId> <version>1.0-SNAPSHOT</version> <dependencies> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>3.8.1</version> <scope>test</scope> </dependency> <!-- 添加Hibernate依赖 --> <dependency> <groupId>org.hibernate</groupId> <artifactId>hibernate-core</artifactId> <version>3.6.10.Final</version> </dependency> <!-- 添加Log4J依赖 --> <dependency> <groupId>log4j</groupId> <artifactId>log4j</artifactId> <version>1.2.16</version> </dependency> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-nop</artifactId> <version>1.6.4</version> </dependency> <!-- 添加javassist --> <dependency> <groupId>javassist</groupId> <artifactId>javassist</artifactId> <version>3.12.0.GA</version> </dependency> <!-- mysql数据库的驱动包 --> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.6</version> </dependency> </dependencies> </project>
2.新建类Event
package com.demo; import java.util.Date; public class Event { private Long id;//id private String title;//标题 private Date date;//日期 public Long getId() { return id; } public void setId(Long id) { this.id = id; } public String getTitle() { return title; } public void setTitle(String title) { this.title = title; } public Date getDate() { return date; } public void setDate(Date date) { this.date = date; } }
3.在resource/mapper文件夹下新建Event.hbm.xml
<?xml version="1.0"?> <!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd"> <hibernate-mapping package="com.demo"> <class name="com.demo.Event" table="EVENTS"> <id name="id" column="EVENT_ID"> <generator class="assigned"/> </id> <property name="date" type="timestamp" column="EVENT_DATE"/> <property name="title"/> </class> </hibernate-mapping >
4.在resource文件夹下新建hibernate.cfg.xml
<?xml version='1.0' encoding='utf-8'?> <!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD 3.0//EN" "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd"> <hibernate-configuration> <session-factory> <!-- Database connection settings --> <property name="connection.driver_class">org.gjt.mm.mysql.Driver</property> <property name="connection.url">jdbc:mysql://192.168.32.95:3306/db2</property> <property name="connection.username">DB_WX_APP</property> <property name="connection.password">LH_longfor</property> <!-- JDBC connection pool (use the built-in) --> <property name="connection.pool_size">1</property> <!-- SQL dialect --> <property name="dialect">org.hibernate.dialect.MySQLDialect</property> <!-- Enable Hibernate's automatic session context management --> <property name="current_session_context_class">thread</property> <!-- Disable the second-level cache --> <property name="cache.provider_class">org.hibernate.cache.NoCacheProvider</property> <!-- Echo all executed SQL to stdout --> <property name="show_sql">true</property> <property name="format_sql">true</property> <!-- Drop and re-create the database schema on startup --> <property name="hbm2ddl.auto">update</property> <mapping resource="mapper/Event.hbm.xml"/> </session-factory> </hibernate-configuration>
5.新建辅助类 HibernateUtil
package com.demo; import org.hibernate.SessionFactory; import org.hibernate.cfg.Configuration; public class HibernateUtil { //定义静态的SessionFactory，产生单例，只生成一个SessionFactory private static final SessionFactory sessionFactory = buildSessionFactory(); //用来初始化SessionFactory private static SessionFactory buildSessionFactory() { try { // Create the SessionFactory from hibernate.cfg.xml return new Configuration().configure().buildSessionFactory(); } catch (Throwable ex) { // Make sure you log the exception, as it might be swallowed System.err.println("Initial SessionFactory creation failed." + ex); throw new ExceptionInInitializerError(ex); } } //得到SessionFactory public static SessionFactory getSessionFactory() { return sessionFactory;//返回SessionFactory的对象 } }
6.新建Test类
package com.demo; import java.util.Date; import java.util.List; import org.hibernate.Session; public class Test { /** * @param args */ public static void main(String[] args) { // TODO Auto-generated method stub Test mgr = new Test(); //if (args[0].equals("store")) { //mgr.createAndStoreEvent("My Event1", new Date());//调用函数插入数据 //} mgr.getList(); // mgr.Get();//单个查询 HibernateUtil.getSessionFactory().close(); } private void createAndStoreEvent(String title, Date theDate) { //得到目前运行的session Session session = HibernateUtil.getSessionFactory().getCurrentSession(); session.beginTransaction();//开始事务 Event theEvent = new Event();//创建bean对象 theEvent.setTitle(title);//设置标题 theEvent.setId(100002L); theEvent.setDate(theDate);//设置日期 session.save(theEvent);//保存对象 session.getTransaction().commit();//提交事务 } private void Get() { //得到目前运行的session Session session = HibernateUtil.getSessionFactory().getCurrentSession(); session.beginTransaction(); Event theEvent = new Event();//创建bean对象 theEvent.setId(100001L); Event e=(Event) session.get(Event.class,100001L); System.out.println(e.getTitle()); session.getTransaction().commit(); } void getList(){ Session session=HibernateUtil.getSessionFactory().getCurrentSession(); session.beginTransaction(); List<Event> list= session.createSQLQuery("select * from EVENTS").addEntity(Event.class).list(); for(Event e:list){ System.out.println(e.getTitle()); } session.getTransaction().commit(); } }
运行Test类即可
https://pan.baidu.com/s/1fhnr4SWTkqd0RAdGniAMtA
