• 吴裕雄--天生自然轻量级JAVA EE企业应用开发Struts2Sping4Hibernate整合开发学习笔记:Hibernate组件属性为集合


    <?xml version="1.0" encoding="GBK"?>
    <project name="hibernate" basedir="." default="">
        <property name="src" value="src"/>
        <property name="dest" value="classes"/>
    
        <path id="classpath">
            <fileset dir="../../lib">
                <include name="**/*.jar"/>
            </fileset>
            <pathelement path="${dest}"/>
        </path>
    
        <target name="compile" description="Compile all source code">
            <delete dir="${dest}"/>
            <mkdir dir="${dest}"/>
            <copy todir="${dest}">
                <fileset dir="${src}">
                    <exclude name="**/*.java"/>
                </fileset>        
            </copy>
            <javac destdir="${dest}" debug="true" includeantruntime="yes"
                deprecation="false" optimize="false" failonerror="true">
                <src path="${src}"/>
                <classpath refid="classpath"/>
                <compilerarg value="-Xlint:deprecation"/>
            </javac>
        </target>
    
        <target name="run" description="Run the main class" depends="compile">
            <java classname="lee.PersonManager" fork="yes" failonerror="true">
                <classpath refid="classpath"/>
            </java>
        </target>
    
    </project>
    <?xml version="1.0" encoding="GBK"?>
    <!-- 指定Hibernate配置文件的DTD信息 -->
    <!DOCTYPE hibernate-configuration PUBLIC
        "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
        "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">
    <!-- hibernate-configuration是配置文件的根元素 -->
    <hibernate-configuration>
        <session-factory>
            <!-- 指定连接数据库所用的驱动 -->
            <property name="connection.driver_class">com.mysql.jdbc.Driver</property>
            <!-- 指定连接数据库的url,其中hibernate是本应用连接的数据库名 -->
            <property name="connection.url">jdbc:mysql://localhost/hibernate</property>
            <!-- 指定连接数据库的用户名 -->
            <property name="connection.username">root</property>
            <!-- 指定连接数据库的密码 -->
            <property name="connection.password">32147</property>
            <!-- 指定连接池里最大连接数 -->
            <property name="hibernate.c3p0.max_size">20</property>
            <!-- 指定连接池里最小连接数 -->
            <property name="hibernate.c3p0.min_size">1</property>
            <!-- 指定连接池里连接的超时时长 -->
            <property name="hibernate.c3p0.timeout">5000</property>
            <!-- 指定连接池里最大缓存多少个Statement对象 -->
            <property name="hibernate.c3p0.max_statements">100</property>
            <property name="hibernate.c3p0.idle_test_period">3000</property>
            <property name="hibernate.c3p0.acquire_increment">2</property>
            <property name="hibernate.c3p0.validate">true</property>
            <!-- 指定数据库方言 -->
            <property name="dialect">org.hibernate.dialect.MySQL5InnoDBDialect</property>
            <!-- 根据需要自动创建数据库 -->
            <property name="hbm2ddl.auto">update</property>
            <!-- 显示Hibernate持久化操作所生成的SQL -->
            <property name="show_sql">true</property>
            <!-- 将SQL脚本进行格式化后再输出 -->
            <property name="hibernate.format_sql">true</property>
            <!-- 罗列所有持久化类的类名 -->
            <mapping class="org.crazyit.app.domain.Person"/>
        </session-factory>
    </hibernate-configuration>
    package lee;
    
    import org.hibernate.*;
    import org.hibernate.cfg.*;
    import org.hibernate.service.*;
    import org.hibernate.boot.registry.*;
    /**
     * Description:
     * <br/>网站: <a href="http://www.crazyit.org">疯狂Java联盟</a>
     * <br/>Copyright (C), 2001-2016, Yeeku.H.Lee
     * <br/>This program is protected by copyright laws.
     * <br/>Program Name:
     * <br/>Date:
     * @author  Yeeku.H.Lee kongyeeku@163.com
     * @version  1.0
     */
    public class HibernateUtil
    {
        public static final SessionFactory sessionFactory;
    
        static
        {
            try
            {
                // 使用默认的hibernate.cfg.xml配置文件创建Configuration实例
                Configuration cfg = new Configuration()
                    .configure();
                // 以Configuration实例来创建SessionFactory实例
                ServiceRegistry serviceRegistry = new StandardServiceRegistryBuilder()
                    .applySettings(cfg.getProperties()).build();
                sessionFactory = cfg.buildSessionFactory(serviceRegistry);
            }
            catch (Throwable ex)
            {
                System.err.println("Initial SessionFactory creation failed." + ex);
                throw new ExceptionInInitializerError(ex);
            }
        }
    
        // ThreadLocal可以隔离多个线程的数据共享,因此不再需要对线程同步
        public static final ThreadLocal<Session> session
            = new ThreadLocal<Session>();
    
        public static Session currentSession()
            throws HibernateException
        {
            Session s = session.get();
            // 如果该线程还没有Session,则创建一个新的Session
            if (s == null)
            {
                s = sessionFactory.openSession();
                // 将获得的Session变量存储在ThreadLocal变量session里
                session.set(s);
            }
            return s;
        }
    
        public static void closeSession()
            throws HibernateException
        {
            Session s = session.get();
            if (s != null)
                s.close();
            session.set(null);
        }
    }
    package lee;
    
    import org.hibernate.Transaction;
    import org.hibernate.Session;
    
    import java.util.*;
    
    import org.crazyit.app.domain.*;
    
    /**
     * Description:
     * <br/>网站: <a href="http://www.crazyit.org">疯狂Java联盟</a>
     * <br/>Copyright (C), 2001-2016, Yeeku.H.Lee
     * <br/>This program is protected by copyright laws.
     * <br/>Program Name:
     * <br/>Date:
     * @author  Yeeku.H.Lee kongyeeku@163.com
     * @version  1.0
     */
    public class PersonManager
    {
        public static void main(String[] args)
        {
            PersonManager mgr = new PersonManager();
            mgr.createAndStorePerson();
            HibernateUtil.sessionFactory.close();
        }
    
        private void createAndStorePerson()
        {
            Session session = HibernateUtil.currentSession();
            Transaction tx = session.beginTransaction();
            // 创建Person对象
            Person person = new Person();
            person.setAge(29);
            Name n = new Name("crazyit.org" , "疯狂Java联盟");
            n.getPower().put("运气" , 96);
            n.getPower().put("智慧" , 98);
            person.setName(n);
            session.save(person);
            tx.commit();
            HibernateUtil.closeSession();
        }
    }
    package org.crazyit.app.domain;
    
    import java.util.*;
    import javax.persistence.*;
    import org.hibernate.annotations.Parent;
    /**
     * Description:
     * <br/>网站: <a href="http://www.crazyit.org">疯狂Java联盟</a>
     * <br/>Copyright (C), 2001-2016, Yeeku.H.Lee
     * <br/>This program is protected by copyright laws.
     * <br/>Program Name:
     * <br/>Date:
     * @author  Yeeku.H.Lee kongyeeku@163.com
     * @version  1.0
     */
    @Embeddable
    public class Name
    {
        // 定义first成员变量
        @Column(name="person_firstname")
        private String first;
        // 定义last成员变量
        @Column(name="person_lastname")
        private String last;
        // 引用拥有该Name的Person对象
        @Parent
        private Person owner;
        // 集合属性,保留该对象关联的考试成绩
        @ElementCollection(targetClass=Integer.class)
        @CollectionTable(name="power_inf",
            joinColumns=@JoinColumn(name="person_name_id" , nullable=false))
        @MapKeyColumn(name="name_aspect")
        @Column(name="name_power" , nullable=false)
        @MapKeyClass(String.class)
        private Map<String , Integer> power
            = new HashMap<>();
    
        // 无参数的构造器
        public Name()
        {
        }
        // 初始化全部成员变量的构造器
        public Name(String first , String last)
        {
            this.first = first;
            this.last = last;
        }
    
        // first的setter和getter方法
        public void setFirst(String first)
        {
            this.first = first;
        }
        public String getFirst()
        {
            return this.first;
        }
    
        // last的setter和getter方法
        public void setLast(String last)
        {
            this.last = last;
        }
        public String getLast()
        {
            return this.last;
        }
    
        // owner的setter和getter方法
        public void setOwner(Person owner)
        {
            this.owner = owner;
        }
        public Person getOwner()
        {
            return this.owner;
        }
    
        // power的setter和getter方法
        public void setPower(Map<String ,Integer> power)
        {
            this.power = power;
        }
        public Map<String ,Integer> getPower()
        {
            return this.power;
        }
    }
    package org.crazyit.app.domain;
    
    import javax.persistence.*;
    /**
     * Description:
     * <br/>网站: <a href="http://www.crazyit.org">疯狂Java联盟</a>
     * <br/>Copyright (C), 2001-2016, Yeeku.H.Lee
     * <br/>This program is protected by copyright laws.
     * <br/>Program Name:
     * <br/>Date:
     * @author  Yeeku.H.Lee kongyeeku@163.com
     * @version  1.0
     */
    @Entity
    @Table(name="person_inf")
    public class Person
    {
        @Id @Column(name="person_id")
        @GeneratedValue(strategy=GenerationType.IDENTITY)
        private Integer id;
        private int age;
        private Name name;
    
        // id的setter和getter方法
        public void setId(Integer id)
        {
            this.id = id;
        }
        public Integer getId()
        {
            return this.id;
        }
    
        // age的setter和getter方法
        public void setAge(int age)
        {
            this.age = age;
        }
        public int getAge()
        {
            return this.age;
        }
    
        // name的setter和getter方法
        public void setName(Name name)
        {
            this.name = name;
        }
        public Name getName()
        {
            return this.name;
        }
    
    }
  • 相关阅读:
    c++中vector的用法详解[转]
    C++ String
    va_list用法
    如何高效的分析AWR报告
    Oracle存储过程跟踪错误的方法
    Oracle找出锁,并KILL掉
    OracleAWR报告概念和生成
    Linux系统的内存管理
    AIX系统下配置FTP服务
    通过修改注册表配置IE选项
  • 原文地址:https://www.cnblogs.com/tszr/p/12369464.html
Copyright © 2020-2023  润新知