<?xml version="1.0" encoding="GBK"?> <project name="hibernate" basedir="." default=""> <property name="src" value="src"/> <property name="dest" value="classes"/> <path id="classpath"> <fileset dir="../../lib"> <include name="**/*.jar"/> </fileset> <pathelement path="${dest}"/> </path> <target name="compile" description="Compile all source code"> <delete dir="${dest}"/> <mkdir dir="${dest}"/> <copy todir="${dest}"> <fileset dir="${src}"> <exclude name="**/*.java"/> </fileset> </copy> <javac destdir="${dest}" debug="true" includeantruntime="yes" deprecation="false" optimize="false" failonerror="true"> <src path="${src}"/> <classpath refid="classpath"/> <compilerarg value="-Xlint:deprecation"/> </javac> </target> <target name="run" description="Run the main class" depends="compile"> <java classname="lee.NewsManager" fork="yes" failonerror="true"> <classpath refid="classpath"/> </java> </target> </project>
drop database hibernate; create database hibernate; use hibernate; create table news_inf ( id int auto_increment primary key, title varchar(255) not null, content varchar(255), full_content varchar(255) ); DELIMITER | create trigger t_full_content_gen BEFORE INSERT ON news_inf FOR EACH ROW BEGIN set new.full_content=concat(new.title,new.content); END; | DELIMITER ;
<?xml version="1.0" encoding="GBK"?> <!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hibernate是本应用连接的数据库名 --> <property name="connection.url">jdbc:mysql://localhost/hibernate</property> <!-- 指定连接数据库的用户名 --> <property name="connection.username">root</property> <!-- 指定连接数据库的密码 --> <property name="connection.password">32147</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表 --> <property name="hbm2ddl.auto">update</property><!--①--> <!-- 显示Hibernate持久化操作所生成的SQL --> <property name="show_sql">true</property> <!-- 将SQL脚本进行格式化后再输出 --> <property name="hibernate.format_sql">true</property> <!-- 罗列所有持久化类的类名 --> <mapping class="org.crazyit.app.domain.News"/> </session-factory> </hibernate-configuration>
package org.crazyit.app.domain; import javax.persistence.*; import org.hibernate.annotations.Generated; import org.hibernate.annotations.GenerationTime; /** * Description: * <br/>网站: <a href="http://www.crazyit.org">疯狂Java联盟</a> * <br/>Copyright (C), 2001-2016, Yeeku.H.Lee * <br/>This program is protected by copyright laws. * <br/>Program Name: * <br/>Date: * @author Yeeku.H.Lee kongyeeku@163.com * @version 1.0 */ @Entity @Table(name="news_inf") public class News { // 消息类的标识属性 @Id @GeneratedValue(strategy=GenerationType.IDENTITY) private Integer id; // 消息标题 private String title; // 消息内容 private String content; // 指定@Generated的value为ALWAYS，表明该属性的值由数据库生成， // Hibernate会在每次执行insert、update时执行select语句来查询获取该属性的值 @Generated(GenerationTime.ALWAYS) private String fullContent; // id的setter和getter方法 public void setId(Integer id) { this.id = id; } public Integer getId() { return this.id; } // title的setter和getter方法 public void setTitle(String title) { this.title = title; } public String getTitle() { return this.title; } // content的setter和getter方法 public void setContent(String content) { this.content = content; } public String getContent() { return this.content; } // fullContent的setter和getter方法 public void setFullContent(String fullContent) { this.fullContent = fullContent; } public String getFullContent() { return this.fullContent; } }
package lee; import org.hibernate.*; import org.hibernate.cfg.*; import org.hibernate.service.*; import org.hibernate.boot.registry.*; import org.crazyit.app.domain.*; /** * Description: * <br/>网站: <a href="http://www.crazyit.org">疯狂Java联盟</a> * <br/>Copyright (C), 2001-2016, Yeeku.H.Lee * <br/>This program is protected by copyright laws. * <br/>Program Name: * <br/>Date: * @author Yeeku.H.Lee kongyeeku@163.com * @version 1.0 */ public class NewsManager { public static void main(String[] args) throws Exception { // 实例化Configuration， Configuration conf = new Configuration() // 不带参数的configure()方法默认加载hibernate.cfg.xml文件， // 如果传入abc.xml作为参数，则不再加载hibernate.cfg.xml，改为加载abc.xml .configure(); ServiceRegistry serviceRegistry = new StandardServiceRegistryBuilder() .applySettings(conf.getProperties()).build(); // 以Configuration实例创建SessionFactory实例 SessionFactory sf = conf.buildSessionFactory(serviceRegistry); // 创建Session Session sess = sf.openSession(); // 开始事务 Transaction tx = sess.beginTransaction(); // 创建消息对象 News n = new News(); // 设置消息标题和消息内容 n.setTitle("疯狂Java联盟成立了"); n.setContent("疯狂Java联盟成立了，" + "网站地址http://www.crazyit.org"); // 保存消息 sess.save(n); // News n = (News)sess.get(News.class , 1); // // 输出fullContent值 // System.out.println(n.getFullContent()); // 提交事务 tx.commit(); // 关闭Session sess.close(); sf.close(); } }
