Hibernate入門

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okay，瞭解了struts2後開始搭建hibernate環境

eclipse 4.3.2

jdk 1.7.0_45

hibernate 4.3.5

mysql 5.1.67

準備好上面的環境，安裝hibernate（拷貝hibernate所需lib-->requered-->jar包和mysql的java驅動jar包拷到lib裡面）

在資料庫建立一個資料庫hibernate,建立usertable表欄位有name,password

在eclipse中建立一個java project Hiernate

在src目錄下建立一個hibernate.cfg.xml檔案（可以在文檔裡面找到基本的配置，然後根據自己的情況修改一下）

<?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目錄下建立一個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;    }    }

在與bean同目錄下建立一個user.hbm.xml（這裡可以在文檔裡面找到，根據自己的bean和資料庫表進行修改）

 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目錄下建立一個測試類別，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     }

最後運行Test.java，控制台沒有報錯，病輸出對應的sql語句。到資料庫中執行尋找命令，插入成功

這裡只是為了測試hibernate環境，熟悉hibernate的工作流程，比較粗糙