Hibernate 筑项初探

Hibernate 建项初探
首先建一个web project

导入Hibernate所需要的jar包，

.
+lib
  antlr.jar
  cglib.jar
  asm.jar
  asm-attrs.jars
  commons-collections.jar
  commons-logging.jar
  ehcache.jar
  hibernate3.jar
  jta.jar
  dom4j.jar
  log4j.jar



这里我用的数据库是MySQL
然后创建所需要的Model，代码如下：

package com.xll.bean;


public class UserModel implements java.io.Serializable{
	
	private static final long serialVersionUID = 1L;
	
	private int uuid;     
	private String userId;
	private String userName;
	private int age;
	private String pwd;
	private String registerTime;
	
         public UserModel(){}//无参构造

//setter and getter .....

在model的同级目录下建立UserModel.hbm.xml映射文件

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping SYSTEM "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd" >

<hibernate-mapping>
	<class name="com.xll.bean.UserModel" table="tbl_user" >
		<id name="uuid" column="uuid" >
			<generator class="assigned"/>
		</id>
		<property name="userId" column="userId" />		
		<property name="userName" column="userName" />		
		<property name="age" column="age" />	
		<property name="registerTime" column="registerTime" />
		<property name="pwd" column="pwd" />
		
		
		
	</class>
</hibernate-mapping>

然后在src下配置hibernate.cfg.xml文件

<?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:3306/mydb</property>
        <property name="connection.username">root</property>
        <property name="connection.password">123</property>


        <!-- SQL dialect -->
        <property name="dialect">org.hibernate.dialect.MySQLDialect</property>

        <!-- Echo all executed SQL to stdout -->
        <property name="show_sql">true</property>

        <mapping resource="com/xll/bean/UserModel.hbm.xml"/>

    </session-factory>

</hibernate-configuration>

编写测试类 Client.java

package com.xll.test;

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.Configuration;

import com.xll.bean.UserModel;

public class Client {

	public static void main(String[] args) {
		UserModel um = new UserModel();
		um.setAge(11);
		um.setPwd("123123");
		um.setRegisterTime("2011-10-10");
		um.setUserId("432123");
		um.setUserName("xiaoliang");
		um.setUuid(6666);

		SessionFactory sf = new Configuration().configure().buildSessionFactory();
		Session s = null;
		Transaction t = null;

		try {
			s = sf.openSession();
			t = s.beginTransaction();
			s.save(um);
			t.commit();
		} catch (Exception e) {
			e.printStackTrace();
			t.rollback();
		} finally {
			s.close();
		}

	}

}

运行结果：

Hibernate: insert into tbl_user (userId, userName, age, registerTime, pwd, uuid) values (?, ?, ?, ?, ?, ?)//配置中的show_sql