Hibernate映射类型demo

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Hibernate映射类型demo

此demo用于演示如何使用Hibernate的映射类型，如何映射实体类和表字段：

hbm.xml在描述字段和属性映射时，采用type属性指定映射类型。

映射类型作用：主要负责实现属性和字段值之间的转化。

db.sql

drop table if exists t_foo;create table t_foo(  t_idint primary key auto_increment,  t_name varchar(30)  not null,  t_salary double,  t_hire_date date,  t_marry char(1),  t_last_login_time timestamp)default character set utf8;

Foo.java

package entity;import java.sql.Date;import java.sql.Timestamp;public class Foo {private Integer id; //t_idint primary key auto_increment,  private String name; //t_name varchar(30)  not null,  private double salary; //t_salary double,  private Date hireDate; //t_hire_date date,  private boolean marry; //t_marry char(1),  private Timestamp lastLoginTime; //t_last_login_time timestamp  public Integer getId() {return id;}public void setId(Integer id) {this.id = id;}public String getName() {return name;}public void setName(String name) {this.name = name;}public double getSalary() {return salary;}public void setSalary(double salary) {this.salary = salary;}public Date getHireDate() {return hireDate;}public void setHireDate(Date hireDate) {this.hireDate = hireDate;}public boolean isMarry() {return marry;}public void setMarry(boolean marry) {this.marry = marry;}public Timestamp getLastLoginTime() {return lastLoginTime;}public void setLastLoginTime(Timestamp lastLoginTime) {this.lastLoginTime = lastLoginTime;}@Overridepublic String toString() {return "Foo [hireDate=" + hireDate + ", id=" + id + ", lastLoginTime="+ lastLoginTime + ", marry=" + marry + ", name=" + name+ ", salary=" + salary + "]";}  }

foo.hbm.xml

<?xml version="1.0" encoding="utf-8"?><!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN""http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd"><hibernate-mapping>    <class name="entity.Foo" table="t_foo">   <!-- 主键映射 -->        <id name="id" type="integer">            <column name="t_id" />            <!-- 指定主键生成方式  MySQL的自增长-->            <generator class="identity" />        </id>        <!-- 非主键映射 -->        <property name="name" type="string">            <column name="t_name" length="30" />        </property>        <property name="salary" type="double" column="t_salary">        </property>        <property name="hireDate" type="date">        <column name="t_hire_date"></column>        </property>        <property name="marry" type="yes_no">        <column name="t_marry"></column>        </property>        <property name="lastLoginTime" type="timestamp">            <column name="t_last_login_time" />        </property>    </class></hibernate-mapping>

TestFoo.java

package test;import java.sql.Date;import java.sql.Timestamp;import org.hibernate.Session;import org.hibernate.Transaction;import org.junit.Test;import util.HibernateUtil;import entity.Foo;public class TestFoo {//@Testpublic void testInsert(){Foo foo = new Foo();foo.setName("ROSE");foo.setSalary(6000.5);foo.setMarry(false);foo.setHireDate(new Date(System.currentTimeMillis()));foo.setLastLoginTime(new Timestamp(System.currentTimeMillis()));Session session = HibernateUtil.openSession();Transaction tx = session.beginTransaction();session.save(foo);tx.commit();session.close();}@Testpublic void testFindAll(){Session session = HibernateUtil.openSession();Foo foo = (Foo) session.load(Foo.class,2);System.out.println(foo);}}

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