hibernate入门简单案例

使用eclipse ee安装hibernate-tools插件，方便配置hibernate

首先导入hibernate和mysql所需的jar包

现在数据库中创建好对应的database、

在src里创建hibernate的配置文件hibernate.cfg.xml

<?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>    <property name="connection.username">steve</property>    <property name="connection.password">845109060</property>    <property name="connection.driver_class">com.mysql.jdbc.Driver</property>    <property name="connection.url">jdbc:mysql://localhost/hibernate</property>    <property name="dialect">org.hibernate.dialect.MySQLDialect</property>        <property name="show_sql">true</property>    <property name="format_sql">true</property>    <property name="hbm2ddl.auto">create</property>        <mapping resource="hibernate/hibernate.hbm.xml"/>    </session-factory></hibernate-configuration>

然后创建实体类Student（按照标准javabean方式创建）

package hibernate;public class Student {private int id;private String name;private String sex;private String address;public int getId() {return id;}public void setId(int id) {this.id = id;}public String getName() {return name;}public void setName(String name) {this.name = name;}public String getSex() {return sex;}public void setSex(String sex) {this.sex = sex;}public String getAddress() {return address;}public void setAddress(String address) {this.address = address;}public Student() {}public Student(int id, String name, String sex, String address) {super();this.id = id;this.name = name;this.sex = sex;this.address = address;}@Overridepublic String toString() {return "Student [id=" + id + ", name=" + name + ", sex=" + sex+ ", address=" + address + "]";}}

配置实体类的映射文件Student.hbm.xml

<?xml version="1.0"?><!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN""http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd"><!-- Generated 2015-12-29 20:14:53 by Hibernate Tools 3.4.0.CR1 --><hibernate-mapping>    <class name="hibernate.Student" table="STUDENT">        <id name="id" type="int">            <column name="ID" />            <generator class="assigned" />        </id>        <property name="name" type="java.lang.String">            <column name="NAME" />        </property>        <property name="sex" type="java.lang.String">            <column name="SEX" />        </property>        <property name="address" type="java.lang.String">            <column name="ADDRESS" />        </property>    </class></hibernate-mapping>

注意配置完后再hibernat.cfg.xml中注册一下

写测试类

package hibernate;import org.hibernate.Session;import org.hibernate.SessionFactory;import org.hibernate.Transaction;import org.hibernate.cfg.Configuration;import org.hibernate.service.ServiceRegistry;import org.hibernate.service.ServiceRegistryBuilder;import org.junit.After;import org.junit.Before;import org.junit.Test;import antlr.debug.TraceAdapter;public class Testabc {private SessionFactory sessionfactory;private Session session;private Transaction transcation;@Beforepublic void before(){//创建配置对象Configuration config=new Configuration().configure();//创建服务注册对象ServiceRegistry  serviceRegistry=new ServiceRegistryBuilder().applySettings(config.getProperties()).buildServiceRegistry();//创建会话工厂对象sessionfactory=config.buildSessionFactory(serviceRegistry);//创建会话对象session=sessionfactory.openSession();//创建事物transcation=session.beginTransaction();}@Testpublic void test(){Student s=new Student(1,"steve","man","america");//保存对象进数据库session.save(s);}@Afterpublic void after(){//提交会话transcation.commit();session.close();sessionfactory.close();}}

运行后数据库中就创建好了Student表，并把Student的对象存入数据库的记录中。