hibernate课程初探单表映射3-4 组件属性

本节内容：

1　　　　简介组件属性

2　　　　demo

1　　　　简介组件属性：

<component　　name = "address" class = "Address">

</component>

hibernate 组件component标签其实就是Student实体类中有Address对象。

2　　　　demo:

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.driver_class">com.mysql.jdbc.Driver</property>
    <property name="connection.url">jdbc:mysql://localhost:3306/bendi</property>
    <property name="connection.username">root</property>
    <property name="connection.password"></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 = "Student.hbm.xml"/>
    </session-factory>
</hibernate-configuration>

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">

<hibernate-mapping>
    <class name="com.ddwei.student.Student" table="STUDENT">
        <id name="pid" type="int">
            <column name="PID" />
            <generator class="increment" />
        </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="birthday" type="date">


            <column name="BIRTHDAY" />
        </property>



        <property name="picture" type="java.sql.Blob">
            <column name="Picture" />
        </property>
        <component name="address" class="com.ddwei.student.Address">
        <property name="postcode" column="POSTCODE"/>
        <property name="phone" column="PHONE"/>
        <property name="address" column="ADDRESS"/>
        </component>

    </class>
</hibernate-mapping>

StudentTest.java

package hibernate_001;

import java.io.File; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.sql.Blob; import java.sql.SQLException; import java.util.Date;

import org.hibernate.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 com.ddwei.student.Address; import com.ddwei.student.Student;

public class StudentTest { private SessionFactory sessionFactory; private Session session; private Transaction trasaction; @Test public void testSaveStudent(){ // Student student =new Student(1,"周恩来","男",new Date(),"绍兴");//创建学生对象 Student student = new Student(); student.setName("秦始皇"); student.setSex("男"); student.setBirthday(new Date()); // student.setAddress("阿房宫"); Address address = new Address("105789","18912345678","河北敦煌教区"); student.setAddress(address); session.save(student);//会话保存学生对象进入数据库 } @Before public void init(){ //1 创建配置对象 Configuration config = new Configuration().configure(); //2 创建服务对象 ServiceRegistry serviceRe = new ServiceRegistryBuilder().applySettings(config.getProperties()).buildServiceRegistry(); //3 创建会话工厂 sessionFactory = config.buildSessionFactory(serviceRe); //4 打开会话 session = sessionFactory.openSession(); //5 创建事务 trasaction = session.beginTransaction(); } @After public void destroy(){ trasaction.commit(); session.close(); sessionFactory.close(); }

}

Student.java

package com.ddwei.student;

import java.sql.Blob; import java.util.Date;

public class Student {

// java beans 的设计原则 /** * 1 公有的类 2 共有不带参数构造方法 3 私有属性 4 属性setter/getter方法 */

private int pid;// 学号 private String name;// 姓名 private String sex;// 性别 private Date birthday;// 出生日期 private Address address;// 家庭地址 private Blob picture;//相片

public Student() {

}

public Student(int pid, String name, String sex, Date birthday) { // super(); this.pid = pid; this.name = name; this.sex = sex; this.birthday = birthday; // this.address = address; }

@Override public String toString() { return "Student [pid=" + pid + ", name=" + name + ", sex=" + sex + ", birthday=" + birthday + ", address=" + address + "]"; }

public int getPid() { return pid; }

public void setPid(int pid) { this.pid = pid; }

public Date getBirthday() { return birthday; }

public void setBirthday(Date birthday) { this.birthday = birthday; }

public Address getAddress() { return address; }

public void setAddress(Address address) { this.address = address; }

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 Blob getPicture() { return picture; }

public void setPicture(Blob picture) { this.picture = picture; }

}

Address.java

package com.ddwei.student;

//地址类 public class Address { private String postcode;//邮编 private String phone;//电话 private String address;//地址 public String getPostcode() { return postcode; } public void setPostcode(String postcode) { this.postcode = postcode; } public String getPhone() { return phone; } public void setPhone(String phone) { this.phone = phone; } public String getAddress() { return address; } public void setAddress(String address) { this.address = address; } //无参构造方法 public Address(){ } //有参构造方法 public Address(String postcode, String phone, String address) { super(); this.postcode = postcode; this.phone = phone; this.address = address; } }

相关阅读:
jquery autocomplete
hibernate 数据缓存
Python变量类型
Python基础语法
Python环境搭建
Python简介
python下载地址
第十、十一章，软件测试和软件演化
第九章，软件实现
第八章，面向对象设计

原文地址：https://www.cnblogs.com/1446358788-qq/p/8262016.html

hibernate课程 初探单表映射3-4 组件属性

hibernate课程初探单表映射3-4 组件属性