基础配置hibernate 项目

时间:2021-05-14 08:53:39
 

Event.java

如下:

package com.zixue.bean;

import java.util.Date;

public class Event {

 private int id;
 private String title;
 private Date date;

 public int getId() {
  return id;
 }

 public void setId(int 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;
 }

}

相应的配置如下:

event.hbm.xml

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
        "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
        "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">

<hibernate-mapping>
<class name="com.zixue.bean.Event" table="EVENTS">
        <id name="id" column="EVENT_ID">
            <generator class="native"/>
        </id>
        <!-- type="timestamp"是指要映射到,数据库中的字段类型,如果不指定,映射文件会自动将java类型,转换到数据库中的类型(有些不匹配) -->
      <property name="date" type="timestamp" column="EVENT_DATE"/>
      <property name="title"/>

    </class>

</hibernate-mapping>

然后是hibernate.cfg.xml的配置

<?xml version='1.0' encoding='utf-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
        "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
        "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">

<hibernate-configuration>

    <session-factory>

        <!-- Database connection settings -->
        <property name="connection.driver_class">com.mysql.jdbc.Driver</property>
        <property name="connection.url">jdbc:mysql://localhost/hibernate</property>
        <property name="connection.username">root</property>
        <property name="connection.password">123456</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>
        
           <!-- 根据需要自动创建数据库 -->
        <!-- Drop and re-create the database schema on startup -->
        <property name="hbm2ddl.auto">update</property>

        <mapping resource="com/zixue/bean/event.hb.xml"/>
  <!--  <mapping class="com.bjsxt.hibernate.Teacher"/>-->
    </session-factory>

</hibernate-configuration>

配置结束,然后就是测试

package com.zixue.bean;

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.AnnotationConfiguration;
import org.hibernate.cfg.Configuration;
import org.hibernate.tool.hbm2ddl.SchemaExport;

public class Test {

 public static void main(String args[]){
  Event e=new Event();
  
  SessionFactory sessionFactory = new AnnotationConfiguration().configure().buildSessionFactory();
  Session session = sessionFactory.getCurrentSession();
  session.beginTransaction();
  session.save(e);
  session.getTransaction().commit();
 }
}