Student

package cc.www.hibernateproject.model;

import java.util.jar.Attributes.Name;

public class Student {
  private int id;
  private String Name;
  private StudentInfo studentInfo;

  public int getId() {
    return id;
  }

  public void setId(int id) {
    this.id = id;
  }

  public String getName() {
    return Name;
  }

  public void setName(String name) {
    Name = name;
  }

  public StudentInfo getStudentInfo() {
    return studentInfo;
  }

  public void setStudentInfo(StudentInfo studentInfo) {
    this.studentInfo = studentInfo;
  }

  public Student() {
    // TODO Auto-generated constructor stub
  }

  public Student(String name, StudentInfo studentInfo) {
    Name = name;
    this.studentInfo = studentInfo;
  }

  @Override
  public String toString() {
    return "Student [id=" + id + ", Name=" + Name + ", studentInfo=" + studentInfo + "]";
  }

}

StudentInfo

package cc.www.hibernateproject.model;

import java.util.Date;

public class StudentInfo {
  // 这个类没有ID，只做为Student的一个组件
  private String classes;
  private Date birthday;
  private String address;

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

  public String getClasses() {
    return classes;
  }

  public void setClasses(String classes) {
    this.classes = classes;
  }

  public Date getBirthday() {
    return birthday;
  }


  public String getAddress() {
    return address;
  }

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

  public StudentInfo() {
  }

  @Override
  public String toString() {
    return "StudentInfo [classes=" + classes + ", birthday=" + birthday + ", address=" + address + "]";
  }


}

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 2019-12-31 11:40:42 by Hibernate Tools 3.5.0.Final -->
<hibernate-mapping>
  <class name="cc.www.hibernateproject.model.Student"
    table="s_student">
    <id name="id" type="int">
      <column name="id" />
      <generator class="native" />
    </id>
    <property name="Name" type="java.lang.String">
      <column name="s_name" />
    </property>

    <!-- 配置成为一个组件->属性 -->
    <component name="StudentInfo"
      class="cc.www.hibernateproject.model.StudentInfo">
      <property name="address" type="string">
        <column name="address"></column>
      </property>
      <property name="birthday" type="date">
        <column name="birthday"></column>
      </property>
      <property name="classes" type="string">
        <column name="classes"></column>
      </property>
    </component>
  </class>
</hibernate-mapping>

hibernate.cfg.xml

<?xml version="1.0" encoding="UTF-8"?>
<!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>
  <property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
  <property name="hibernate.connection.url">jdbc:mysql://127.0.0.1:3306/hibernateproject?characterEncoding=utf8&amp;amp;useSSL=false</property>
  <property name="hibernate.connection.username">root</property>
  <property name="hibernate.connection.password">12345</property>
  <property name="hibernate.dialect">org.hibernate.dialect.MySQL5InnoDBDialect</property>
  <property name="hibernate.show_sql">true</property>
  <property name="hibernate.format_sql">true</property>
  <!-- 选择使用C3P0连接池 -->
  <property name="hibernate.connection.provider_class">org.hibernate.c3p0.internal.C3P0ConnectionProvider</property>
  <!-- 最大连接数 -->
  <property name="hibernate.c3p0.max_size">20</property>
  <!-- 最小连接数 -->
  <property name="hibernate.c3p0.min_size">5</property>
  <!-- 获得连接的超时时间,如果超过这个时间,会抛出异常，单位毫秒 -->
  <property name="hibernate.c3p0.timeout">120</property>
  <!-- 最大的PreparedStatement的数量 -->
  <property name="hibernate.c3p0.max_statements">100</property>
  <!-- 每隔120秒检查连接池里的空闲连接 ，单位是秒 -->
  <property name="hibernate.c3p0.idle_test_period">120</property>
  <!-- 当连接池里面的连接用完的时候，C3P0一下获取的新的连接数 -->
  <property name="hibernate.c3p0.acquire_increment">2</property>
  <property name="hibernate.hbm2ddl.auto">update</property>

  <mapping resource="cc/www/hibernateproject/model/Student.hbm.xml"/>

 </session-factory>
</hibernate-configuration>

StudentEntityTest.java

package cc.www.hibernatedemo.model;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.Configuration;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;

import com.mysql.fabric.xmlrpc.base.Array;

import java.util.Arrays;
import java.util.Date;
import java.util.HashSet;
import java.util.Set;

import javax.xml.transform.Source;

@SuppressWarnings("unused")
public class StudentEntityTest {
    private SessionFactory sessionFactory=null;
    private Session session =null;
    private Transaction transaction =null;
    
    @Before
    public void init(){
      //测试同步21
        //System.out.println("开始测试文件");
        //返回的configureation,包含有配置文件里的具体信息
      
        Configuration configure = new Configuration().configure();
        //创建一个SessionFactory工厂类,通过它建立一个数据库连接会话,Session
        sessionFactory= configure.buildSessionFactory();
        
        //通过工厂类开启Session对
        session = sessionFactory.openSession();
        //开始事务
        transaction = session.beginTransaction();
    }
    
    
    @After
    public void destroy(){
        //System.out.println("结束");
        //提交事务
        transaction.commit();
        //关闭
        session.close();
        //关闭工厂
        sessionFactory.close();
    }
    
    
    @Test
    public void test() {
 
      
    }
}