hibernate基本的配置与验证

导入jar包与mysql驱动包

javaBean

src/com/crazyit/app/domain/News.java

package com.crazyit.app.domain;

import javax.persistence.*;

@Entity
@Table(name="news_info")
public class News {
    private Integer id;
    private String title;
    private String content;

    @Id
    @GeneratedValue(strategy=GenerationType.IDENTITY)
    public Integer getId() {
        return id;
    }
    public void setId(Integer id) {
        this.id = id;
    }
    public String getTitle() {
        return title;
    }
    public void setTitle(String title) {
        this.title = title;
    }
    public String getContent() {
        return content;
    }
    public void setContent(String content) {
        this.content = content;
    }

}

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>
        <!-- 指定连接数据库所用的驱动 -->
        <property name="connection.driver_class">com.mysql.jdbc.Driver</property>
        <!-- 指定连接数据库的URL，其中hibernatedemo是本应用连接的数据库名 -->
        <property name="connection.url">jdbc:mysql://localhost:3306/hibernatedemo</property>
        <!-- 指定连接数据库的用户名 -->
        <property name="connection.username">lidian</property>
        <!-- 指定连接数据库的密码 -->
        <property name="connection.password">lidian1234</property>
        <!-- 指定连接池里最大连接数 -->
        <property name="hibernate.c3p0.max_size">20</property>
        <!-- 指定连接池里最小连接数 -->
        <property name="hibernate.c3p0.min_size">1</property>
        <!-- 指定连接池里连接的超时时长 -->
        <property name="hibernate.c3p0.timeout">5000</property>
        <!-- 指定连接池里最大缓存多少个Statement对象 -->
        <property name="hibernate.c3p0.max_statements">100</property>
        <property name="hibernate.c3p0.idle_test_period">3000</property>
        <property name="hibernate.c3p0.acquire_ increment">2</property>
        <property name="hibernate.c3p0.validate">true</property>

        <!-- 指定数据库方言 -->
        <property name="dialect">org.hibernate.dialect.MySQL5InnoDBDialect</property>
        <!-- 根据需要自动创建数据库表 -->
        <property name="hbm2ddl.auto">update</property>
        <!-- 显示hibernate持久化所生成的sql -->
        <property name="show_sql">true</property>
        <!-- 将SQL脚本进行格式化再输出 -->
        <property name="hibernate.format_sql">true</property>

        <!-- 罗列所有持久化的类名 -->
        <mapping class="com.crazyit.app.domain.News"/>
    </session-factory>
</hibernate-configuration>

验证结果

src/lee/NewsManager.java

package lee;

import org.hibernate.cfg.Configuration;
import org.hibernate.service.ServiceRegistry;

import com.crazyit.app.domain.News;

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.boot.registry.StandardServiceRegistryBuilder;;

public class NewsManager {
    public static void main(String[] args) throws Exception{
        //实例化Configuration
        //不带参数的configure()默认加载hibernate.cfg.xml
        //如果传入abc.xml作为参数，则不再加载hibernate.cfg.xml，改为加载abc.xml
        Configuration conf = new Configuration().configure();
        ServiceRegistry  serviceRegistry = new StandardServiceRegistryBuilder()
                .applySettings(conf.getProperties()).build();
        //以Configuration的实例创建SessionFactory
        SessionFactory sf = conf.buildSessionFactory(serviceRegistry);
        //创建Session
        Session se = sf.openSession();
        //开始事物
        Transaction tx = se.beginTransaction();
        //创建消息对象
        News news = new News();
        news.setTitle("疯狂java");
        news.setContent("疯狂java,"+"网址https://www.baidu.com/");

        //保存消息
        se.save(news);
        //提交事务
        tx.commit();
        //关闭session
        se.close();
        sf.close();
    }
}