Spring（三）：Spring整合Hibernate

• 背景：

　　本文主要介绍使用spring-framework-4.3.8.RELEASE与hibernate-release-5.2.9.Final项目整合搭建的过程。

　　开发环境简介：

　　　　1）、jdk 1.8

　　　　2）、spring-framework-4.3.8.RELEASE、hibernate-release-5.2.9.Final

• 引入Spring到新建项目My-SSH中

1）导入Spring的required包到My-SSH项目

　　新建java的dynamic web 项目，之后把spring-framework-4.3.8.RELEASE\libs下的发布包（*-4.3.8.RELEASE.jar，只拷贝这一种即可）拷贝到WebContent\WEB-INF\lib下。

　　除了spring的开发包外，在运行spring时，必须依赖commons-logging包，因此从http://commons.apache.org/proper/commons-logging/download_logging.cgi下载最新的commons-logging包，解压后把包commons-logging-1.2-bin\commons-logging-1.2\commons-logging-1.2.jar拷贝到WebContent\WEB-INF\lib下。

2）配置WebContent\WEB-INF\web.xml

 <?xml version="1.0" encoding="UTF-8"?>
 <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID"
     version="3.0">
     <display-name>My-SSH</display-name>

     <welcome-file-list>
         <welcome-file>index.html</welcome-file>
         <welcome-file>index</welcome-file>
     </welcome-file-list>

       <!-- 配置启动IOC容器的Listener -->
     <!-- needed for ContextLoaderListener -->
     <context-param>
         <param-name>contextConfigLocation</param-name>
         <param-value>classpath:applicationContext.xml</param-value>
     </context-param>

     <!-- Bootstraps the root web application context before servlet initialization -->
     <listener>
         <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
     </listener>
 </web-app>

3）在My-SSH项目根路径下创建conf（Source Folder）文件夹，并添加spring配置文件applicationContext.xml 

注意：

在新建该文件时，需要设定namespace包括：aop,beans,context,tx。

• 整合Hibernate到My-SSH项目，并与Spring整合

1）导入Hibernate的required包到My-SSH项目

把Hibernate开发包解压路径hibernate-release-5.2.9.Final\lib\required\下的所有包拷贝到WebContent\WEB-INF\lib下;

把mysql-connector-java-5.1.2-beta-bin.jar开发包拷贝到WebContent\WEB-INF\lib下;

引入C3P0开发包，把hibernate-release-5.2.9.Final\lib\optional\c3p0\下的所有包拷贝到WebContent\WEB-INF\lib下。

2）在My-SSH项目根目录下的conf文件中，新建hibernate配置文件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>
         <!--
         把一下配置信息转移到jdbc.properties中。
         <property name="hibernate.connection.username">root</property>
         <property name="hibernate.connection.password">123456</property>
         <property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
         <property name="hibernate.connection.url">jdbc:mysql://localhost/my_ssh</property>
         -->

         <property name="hibernate.dialect">org.hibernate.dialect.MySQL5InnoDBDialect</property>
         <property name="hibernate.show_sql">true</property>
         <property name="hibernate.format_sql">true</property>
         <property name="hibernate.hbm2ddl.auto">update</property>
         <property name="hibernate.current_session_context_class">thread</property>
     </session-factory>
 </hibernate-configuration>

3）在My-SSH项目根目录下的conf文件中，新建jdbc.properties文件

#-----------------------------------------------------
# \u6570\u636E\u5E93\u914D\u7F6E
#-----------------------------------------------------
#\u670D\u52A1\u5668\u5730\u5740
host=127.0.0.1
dbName=my_ssh
jdbc.driverClassName=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://${host}:3306/${dbName}
jdbc.username=root
jdbc.password=123456

#-----------------------------------------------------
# \u9002\u7528\u4E8Ec3p0\u7684\u914D\u7F6E
#-----------------------------------------------------
#-----------------------------------------------------
# c3p0\u53CD\u7A7A\u95F2\u8BBE\u7F6E\uFF0C\u9632\u6B628\u5C0F\u65F6\u5931\u6548\u95EE\u989828800
#-----------------------------------------------------
#idleConnectionTestPeriod\u8981\u5C0F\u4E8EMySQL\u7684wait_timeout
jdbc.c3p0.testConnectionOnCheckout=false
jdbc.c3p0.testConnectionOnCheckin=true
jdbc.c3p0.idleConnectionTestPeriod=3600
#-----------------------------------------------------
# c3p0\u8FDE\u63A5\u6C60\u914D\u7F6E
#-----------------------------------------------------
#initialPoolSize, minPoolSize, maxPoolSize define the number of Connections that will be pooled.
#Please ensure that minPoolSize <= maxPoolSize.
#Unreasonable values of initialPoolSize will be ignored, and minPoolSize will be used instead.
jdbc.c3p0.initialPoolSize=10
jdbc.c3p0.minPoolSize=10
jdbc.c3p0.maxPoolSize=100
#maxIdleTime defines how many seconds a Connection should be permitted to go unused before being culled from the pool.
jdbc.c3p0.maxIdleTime=3600
#-----------------------------------------------------
# hibernate\u8FDE\u63A5\u6C60\u914D\u7F6E
#-----------------------------------------------------
hibernate.connection.driverClass=com.mysql.jdbc.Driver
hibernate.connection.url=jdbc:mysql://${host}:3306/${dbName}
hibernate.dialect=org.hibernate.dialect.MySQL5InnoDBDialect
hibernate.show_sql=true
hibernate.format_sql=true
hibernate.hbm2ddl.auto=update

4）通过配置My-SSH项目根目录下的conf下的applicationContext.xml文件，将hibernate集成到spring中

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:context="http://www.springframework.org/schema/context"
    xmlns:tx="http://www.springframework.org/schema/tx"
    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.3.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd
        http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.3.xsd">

    <!-- 加载配置文件 -->
    <context:property-placeholder location="classpath:jdbc.properties" file-encoding="utf-8" ignore-unresolvable="true" />

    <!-- 配置数据源 -->
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <property name="driverClass" value="${jdbc.driverClassName}"></property>
        <property name="jdbcUrl" value="${jdbc.url}"></property>
        <property name="user" value="${jdbc.username}"></property>
        <property name="password" value="${jdbc.password}"></property>
        <property name="testConnectionOnCheckout" value="${jdbc.c3p0.testConnectionOnCheckout}"></property>
        <property name="testConnectionOnCheckin" value="${jdbc.c3p0.testConnectionOnCheckin}"></property>
        <property name="idleConnectionTestPeriod" value="${jdbc.c3p0.idleConnectionTestPeriod}"></property>
        <property name="initialPoolSize" value="${jdbc.c3p0.initialPoolSize}"></property>
        <property name="minPoolSize" value="${jdbc.c3p0.minPoolSize}"></property>
        <property name="maxPoolSize" value="${jdbc.c3p0.maxPoolSize}"></property>
        <property name="maxIdleTime" value="${jdbc.c3p0.maxIdleTime}"></property>
    </bean>

    <bean id="sessionFactory" class="org.springframework.orm.hibernate5.LocalSessionFactoryBean">
        <!-- 数据源dataSource -->
        <property name="dataSource" ref="dataSource" />

        <!-- hibernate的配置方案一  -->
        <property name="configLocation" value="classpath:hibernate.cfg.xml"></property>
        <!-- hibernate的配置方案二  -->
        <!--
        <property name="hibernateProperties">
            <props>
                <prop key="hibernate.hbm2ddl.auto">${hibernate.hbm2ddl.auto}</prop>
                <prop key="hibernate.dialect">${hibernate.dialect}</prop>
                <prop key="hibernate.show_sql">${hibernate.show_sql}</prop>
                <prop key="hibernate.format_sql">${hibernate.format_sql}</prop>
                <prop key="hibernate.temp.use_jdbc_metadata_defaults">false</prop>
            </props>
        </property>
         -->

        <!-- 持久化类的位置方案一，通过包进行扫描 -->
        <property name="mappingLocations" value="classpath:com/dx/ssh/entities/*.hbm.xml"></property>
        <!-- spring的spring.jar的jar包内，在org.springframework.orm.hibernate3.annotation下，
            有一个AnnotationSessionFactoryBean类，其中有一个属性叫做"packagesToScan"， 有个方法叫setpackagesToScan()，
        也就是说我可以再spring里面将这个属性给设定上。
            packagesToScan是"包扫描"的意思，哪些包spring可以给我们扫描一下，看看有哪些实体类，
        这一项在我们在配置文件中配置hibernate的实体类的时候可以这么配，只要给出具体的扫描范围就可以了，
        不需要将实体类一个一个的写出来
        -->
        <!-- 持久化类的位置方案二，通过包进行扫描 -->
        <!--
        <property name="packagesToScan">
            <list>
                <value>com.dx.ssh.entities</value>
            </list>
        </property>
        -->
        <!-- 持久化类的位置方案三，通过类进行扫描 -->
        <!--
        <property name="annotatedClasses">
            <list>
                <value>com.dx.ssh.entities.Member</value>
                <value>com.dx.ssh.entities.Log</value>
            </list>
        </property>
        -->
    </bean>
    <!-- 配置Hibernate事务管理器 -->
    <bean id="transactionManager" class="org.springframework.orm.hibernate5.HibernateTransactionManager">
        <property name="sessionFactory" ref="sessionFactory" />
    </bean>

    <!-- 配置事务异常封装 -->
    <bean id="persistenceExceptionTranslationPostProcessor" class="org.springframework.dao.annotation.PersistenceExceptionTranslationPostProcessor" />

    <!-- 基于数据源的事务管理器 -->
    <!--
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"></property>
    </bean>
     -->        

    <!-- 第一种方式: 注解方式配置事物 -->
    <tx:annotation-driven transaction-manager="transactionManager" />
</beans>

• 测试是否集成成功

在My-SSH项目的src下新建包com.dx.ssh.entities，在包内添加Member及Member.hbm.xml

Member.java

 package com.dx.ssh.entities;

 public class Member {
     private Integer id;
     private String name;

     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;
     }
 }

Member.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 2017-5-5 23:51:42 by Hibernate Tools 3.5.0.Final -->
 <hibernate-mapping>
     <class name="com.dx.ssh.entities.Member" table="MEMBER">
         <id name="id" type="java.lang.Integer">
             <column name="ID" />
             <generator class="native" />
         </id>
         <property name="name" type="java.lang.String">
             <column name="NAME" />
         </property>
     </class>
 </hibernate-mapping>

运行项目，如果项目启动没有错误，并且在mysql新建的数据my_ssh库中包含表MEMBE，就说明集成成功。