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Hibernate入门
okay,了解了struts2后开始搭建hibernate环境
eclipse 4.3.2
jdk 1.7.0_45
hibernate 4.3.5
mysql 5.1.67
准备好上面的环境,安装hibernate(拷贝hibernate所需lib-->requered-->jar包和mysql的java驱动jar包拷到lib里面)
在数据库新建一个数据库hibernate,创建usertable表字段有name,password
在eclipse中新建一个java project Hiernate
在src目录下新建一个hibernate.cfg.xml文件(可以在文档里面找到基本的配置,然后根据自己的情况修改一下)
<?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">com.mysql.jdbc.Driver</property> <property name="connection.url">jdbc:mysql://localhost:3306/hibernate</property> <property name="connection.username">root</property> <property name="connection.password"></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.internal.NoCacheProvider</property> <!-- Echo all executed SQL to stdout --> <property name="show_sql">true</property> <!-- Drop and re-create the database schema on startup --> <property name="hbm2ddl.auto">update</property> <mapping resource="com/gxf/beans/user.hbm.xml"/> </session-factory> </hibernate-configuration>
在src目录下新建一个bean,User.java
package com.gxf.beans; public class User { private String name; private String password; public User(String name, String password) { super(); this.name = name; this.password = password; } public String getName() { return name; } public void setName(String name) { this.name = name; } public String getPassword() { return password; } public void setPassword(String password) { this.password = password; } }
在与bean同目录下新建一个user.hbm.xml(这里可以在文档里面找到,根据自己的bean和数据库表进行修改)
1 <?xml version="1.0"?> 2 <!DOCTYPE hibernate-mapping PUBLIC 3 "-//Hibernate/Hibernate Mapping DTD//EN" 4 "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd" > 5 6 <hibernate-mapping package="com.gxf.beans"> 7 8 <class name="User" table="usertable"> 9 <id name="name"> 10 </id> 11 <property name="password"/> 12 </class> 13 14 </hibernate-mapping>
在src目录下新建一个测试类,Test.java
1 package com.gxf.test; 2 3 import org.hibernate.HibernateException; 4 import org.hibernate.Session; 5 import org.hibernate.SessionFactory; 6 import org.hibernate.Transaction; 7 import org.hibernate.boot.registry.StandardServiceRegistryBuilder; 8 import org.hibernate.cfg.Configuration; 9 import org.hibernate.service.ServiceRegistry; 10 11 import com.gxf.beans.User; 12 13 public class Test { 14 15 public static void main(String[] args) { 16 try { 17 Configuration configuration = new Configuration().configure(); 18 ServiceRegistry serviceRegistry = new StandardServiceRegistryBuilder().applySettings(configuration.getProperties()).build(); 19 SessionFactory sessionFactory = configuration.buildSessionFactory(serviceRegistry); 20 Session session = sessionFactory.openSession(); 21 22 23 Transaction tx = session.beginTransaction(); 24 User userToSave = new User("lisi","luckyzhangsan"); 25 session.save(userToSave); 26 tx.commit(); 27 session.close(); 28 } catch (HibernateException e) { 29 e.printStackTrace(); 30 } 31 } 32 33 }
最后运行Test.java,控制台没有报错,病输出对应的sql语句。到数据库中执行查找命令,插入成功
这里只是为了测试hibernate环境,熟悉hibernate的工作流程,比较粗糙
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