Hibernate学习-2-环境搭建

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案例分析

1.引入jar包

hibernate3.jar + required + jpa目录 + 数据库驱动包

2.写对象以及对象的映射

对象.java

package com.cx.hello;import java.util.Date;/** * Created by cxspace on 16-7-16. */public class Employee {    private int empId;    private String empName;    private Date workDate;    public int getEmpId() {        return empId;    }    public void setEmpId(int empId) {        this.empId = empId;    }    public String getEmpName() {        return empName;    }    public void setEmpName(String empName) {        this.empName = empName;    }    public Date getWorkDate() {        return workDate;    }    public void setWorkDate(Date workDate) {        this.workDate = workDate;    }}

对象.hbm.xml

<?xml version="1.0"?><!DOCTYPE hibernate-mapping PUBLIC        "-//Hibernate/Hibernate Mapping DTD 3.0//EN"        "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd"><hibernate-mapping package="com.cx.hello">    <class name="Employee" table="employee">        <!--对象与表,字段与属性-->        <!--主键,映射-->        <id name="empId" column="id">            <generator class="native"/>        </id>        <!--非主键,映射-->        <property name="empName" column="empName" ></property>        <property name="workDate" column="workDate"></property>    </class></hibernate-mapping>

3.src/hibernate.cfg.xml

数据库连接配置

加载所用的映射

<!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>         <!--数据库连接配置-->        <property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>        <property name="hibernate.connection.url">jdbc:mysql:///learnstruts</property>        <property name="hibernate.connection.username">root</property>        <property name="hibernate.connection.password">33269456.cx</property>        <property name="hibernate.dialect">org.hibernate.dialect.MySQL5Dialect</property>        <!--加载所有映射-->        <mapping resource="com/cx/hello/Employee.hbm.xml"></mapping>    </session-factory></hibernate-configuration>

测试类

package com.cx.hello;import org.hibernate.Session;import org.hibernate.SessionFactory;import org.hibernate.Transaction;import org.hibernate.cfg.Configuration;import org.junit.Test;import java.util.Date;/** * Created by cxspace on 16-7-16. */public class App {    @Test    public void testHello() {        //对象        Employee emp = new Employee();        emp.setEmpName("小华");        emp.setWorkDate(new Date());        //获取加载配置文件的管理类对象        Configuration config = new Configuration();        config.configure(); //加载主配置文件        // 创建session的工厂对象        SessionFactory sf =  config.buildSessionFactory();        //创建session,代表与数据库连接的会话        Session session = sf.openSession();        //开启事务        Transaction tx = session.beginTransaction();        //保存-数据库        session.save(emp);        //提交事物        tx.commit();        //关闭        session.close();        sf.close();    }}

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