关于整合hibernate4和spring3的相关注意事项

这两天在做一个小项目,需要搭建SSH(spring+struts+hibernate),在前一段时间我尝试着用直接向lib目录下添加jar 报的形式,可能由于经验不足,没有配置成功,再后来学会了使用maven进行jar报的管理,所以这次使用 maven+hibernate4+spring3+struts2,毫无疑问,刚开始就需要把相关的jar包通过maven进行导入,不过不得不说这些 相关jar包我也是在网上的一些源码上找的,pom.xml代码如下:

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.cct</groupId>
  <artifactId>webFrame1</artifactId>
  <packaging>war</packaging>
  <version>0.0.1-SNAPSHOT</version>
  <name>webFrame1 Maven Webapp</name>
  <url>http://maven.apache.org</url>
  <!-- 配置了三個遠程倉庫 -->
    <repositories>
        <repository>
            <id>maven</id>
            <name>Maven Repository Switchboard</name>
            <layout>default</layout>
            <url>http://repo1.maven.org/maven2</url>
            <snapshots>
                <enabled>false</enabled>
            </snapshots>
        </repository>

        <repository>
            <id>alibaba-opensource</id>
            <name>alibaba-opensource</name>
            <url>http://code.alibabatech.com/mvn/releases/</url>
            <layout>default</layout>
        </repository>

        <repository>
            <id>alibaba-opensource-snapshot</id>
            <name>alibaba-opensource-snapshot</name>
            <url>http://code.alibabatech.com/mvn/snapshots/</url>
            <layout>default</layout>
        </repository>
    </repositories>

    <!-- 设置编码集,utf-8 -->
    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>

    <!-- 导入相关jar包 -->
    <dependencies>
        <!-- jstl -->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>jstl</artifactId>
            <version>1.2</version>
        </dependency>
        <dependency>
            <groupId>javax.servlet.jsp</groupId>
            <artifactId>jsp-api</artifactId>
            <version>2.2.1-b03</version>
            <scope>provided</scope>
        </dependency>
        <!-- fastJson -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.1.24</version>
        </dependency>
        <!-- mysql数据库驱动 -->
         <dependency>
          <groupId>mysql</groupId> 
          <artifactId>mysql-connector-java</artifactId>
           <version>5.1.21</version> 
           </dependency> 
        <!-- sql server数据库驱动 -->
        <!-- <dependency> <groupId>net.sourceforge.jtds</groupId> <artifactId>jtds</artifactId> <version>1.2.4</version> </dependency> -->
        <!-- oracle数据库驱动 -->
        <!-- <dependency>
            <groupId>com.oracle</groupId>
            <artifactId>ojdbc14</artifactId>
            <version>10.2.0.1.0</version>
        </dependency> -->

        <!-- druid -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>0.2.8</version>
        </dependency>
        <!-- aspectjweaver -->
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjweaver</artifactId>
            <version>1.7.0</version>
        </dependency>
        <!-- servlet -->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>servlet-api</artifactId>
            <version>2.5</version>
            <scope>provided</scope>
        </dependency>
        <!-- log4j -->
        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>1.2.17</version>
        </dependency>
        <!-- junit -->
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.11-beta-1</version>
            <scope>test</scope>
        </dependency>
        <!-- hibernate4 -->
        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-core</artifactId>
            <version>4.1.7.Final</version>
        </dependency>
        <!-- struts2 -->
        <dependency>
            <groupId>org.apache.struts</groupId>
            <artifactId>struts2-core</artifactId>
            <version>2.3.4.1</version>
            <exclusions>
                <exclusion>
                    <groupId>javassist</groupId>
                    <artifactId>javassist</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>org.apache.struts</groupId>
            <artifactId>struts2-spring-plugin</artifactId>
            <version>2.3.4.1</version>
        </dependency>
        <dependency>
            <groupId>org.apache.struts</groupId>
            <artifactId>struts2-convention-plugin</artifactId>
            <version>2.3.4.1</version>
        </dependency>
        <!-- spring3 -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-core</artifactId>
            <version>3.2.8.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>3.1.2.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>3.1.2.RELEASE</version>
        </dependency>
    <dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-beans</artifactId>
    <version>3.2.8.RELEASE</version>
</dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-web</artifactId>
            <version>3.1.2.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-expression</artifactId>
            <version>3.1.2.RELEASE</version>
        </dependency>
        <dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-orm</artifactId>
    <version>4.1.7.RELEASE</version>
</dependency>
        <dependency>
            <groupId>com.mchange</groupId>
            <artifactId>c3p0</artifactId>
            <version>0.9.5.2</version>
        </dependency>
<dependency>
    <groupId>javax.annotation</groupId>
    <artifactId>javax.annotation-api</artifactId>
    <version>1.2</version>
</dependency>
<dependency>
    <groupId>org.hibernate</groupId>
    <artifactId>hibernate-ehcache</artifactId>
    <version>4.3.2.Final</version>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-test</artifactId>
    <version>3.2.11.RELEASE</version>
</dependency>

<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-context</artifactId>
    <version>3.2.8.RELEASE</version>
</dependency>

    </dependencies>
    <build>
        <finalName>webFrame</finalName>
    </build>
</project>

 下面是spring-hibernate.xml代码:

<?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:tx="http://www.springframework.org/schema/tx"
	xmlns:aop="http://www.springframework.org/schema/aop"
	xsi:schemaLocation="
	http://www.springframework.org/schema/beans 
	http://www.springframework.org/schema/beans/spring-beans-3.0.xsd 
	http://www.springframework.org/schema/tx 
	http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
	http://www.springframework.org/schema/aop 
	http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
	">
	<!-- druid数据源 -->
	<bean name="dataSource" class="com.alibaba.druid.pool.DruidDataSource"
		init-method="init" destroy-method="close">
		<property name="url" value="${jdbc_url}" />
		<property name="username" value="${jdbc_username}" />
		<property name="password" value="${jdbc_password}" />

		<!-- 初始化连接大小 -->
		<property name="initialSize" value="0" />
		<!-- 连接池最大使用连接数量 -->
		<property name="maxActive" value="20" />
		<!-- 连接池最大空闲 -->
		<property name="maxIdle" value="20" />
		<!-- 连接池最小空闲 -->
		<property name="minIdle" value="0" />
		<!-- 获取连接最大等待时间 -->
		<property name="maxWait" value="60000" />

		<!-- <property name="poolPreparedStatements" value="true" /> <property 
			name="maxPoolPreparedStatementPerConnectionSize" value="33" /> -->

		<property name="validationQuery" value="${validationQuery}" />
		<property name="testOnBorrow" value="false" />
		<property name="testOnReturn" value="false" />
		<property name="testWhileIdle" value="true" />

		<!-- 配置间隔多久才进行一次检测,检测需要关闭的空闲连接,单位是毫秒 -->
		<property name="timeBetweenEvictionRunsMillis" value="60000" />
		<!-- 配置一个连接在池中最小生存的时间,单位是毫秒 -->
		<property name="minEvictableIdleTimeMillis" value="25200000" />

		<!-- 打开removeAbandoned功能 -->
		<property name="removeAbandoned" value="true" />
		<!-- 1800秒,也就是30分钟 -->
		<property name="removeAbandonedTimeout" value="1800" />
		<!-- 关闭abanded连接时输出错误日志 -->
		<property name="logAbandoned" value="true" />

		<!-- 监控数据库 -->
		<!-- <property name="filters" value="stat" /> -->
		<property name="filters" value="mergeStat" />
	</bean>
	<!-- session工厂 -->
	<bean id="sessionFactory"
		class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
		<property name="dataSource" ref="dataSource" />
		<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>			
			</props>
		</property>	
		<!-- hbm方式配置,下面两种方式效果一样,在此之前都省去了hibernate.cfg,xml配置 -->
		<!-- <property name="mappingDirectoryLocations"> 
			<list> 
				<value>classpath*:com/cct/entity/User</value> 
			</list>
		</property> -->
		<property name="mappingResources">
            <list>
                <value>com/cct/entity/Department.hbm.xml</value>
                 <value>com/cct/entity/User.hbm.xml</value>
                  <value>com/cct/entity/Post.hbm.xml</value>
            </list>
        </property>
	</bean>
	
	

	<!-- 配置事务 -->
	<bean name="transactionManager"
		class="org.springframework.orm.hibernate4.HibernateTransactionManager">
		<property name="sessionFactory">
		<ref local="sessionFactory"/></property>
	</bean>
	

</beans>

 关于数据库连接部分是读取的一个资源文件,在spring.xml通过 

<!-- 引入属性文件 -->

  <context:property-placeholder location="classpath:config.properties"></context:property-placeholder>

<!--添加另外一份spring文件,分开写让逻辑更清晰-->

<import resource="spring-hibernate.xml"></import>

 在spring-hibernate.xml中定义的sessionfactory可以通过在dao层中的@Resource实现注解注入sessionfactory

@Resource
    private SessionFactory sessionFactory ;

这样的话在到dao层中可以直接得到这个sessionfactory,而在此之前呢,是走过不少弯路的,或者说是钻牛角尖,在以前写的一些程序当中,习惯用的是hibernate3,这样的话在dao层中就可以直接继承HibernateDaoSupport,通过继承它,那么在dao的方法中可以通过super.gethibernateTemplate()中的方法轻松实现增删改查操作,但是而这次选择用hibernate4(简称h4)就像看看其中到底区别在哪,在spring的包中里面有hibernate3的支持和hibernate4的支持,而hibernate4中不再有HibernateDaoSupport和hibernateTemplate(),所以在h4项目的dao层中依旧可以继承HibernateDaoSupport(在spring-hibernate.xml中事务和sessionfactory是用的h4的class),但是在运行的时候就会报错:

java.lang.NoSuchMethodError:org.hibernate.SessionFactory.openSession()Lorg/hibernate/classic/Session
而这个显示的是h3里面的错,所以刚开始还以为是h3没能够拿到sessionfactory,于是想将sessionfactory传到hibernateTemplate()里面去,而通过源码发现hibernateTemplate()中的set方法是final修饰的,只能想着自己写个方法通过super.set*()并加上@resource(之前在spring-hibernate.xml中用h4定义的bean)的方式将其传进去,但是发现依旧是这个问题,除此之外,我还想着通过在spring-hibernate.xml中定义一个hibernatetemplate的bean(使用的h3的类),问题还是这个,当时钻着牛角尖,感觉整个人就不好了,不调出来睡觉都觉得不爽,调了一天,后面......也就想明白了,在h3和h4中,h4最大的不同就是对session的处理方式不一样,根本就不需要去继承HibernateDaoSupport,自己就能够独立并且很好的实现对session的处理,所以在项目开发的时候需要注意不能h3和h4混着用,至少我是有些顾虑了,由此写下这篇文章,希望能够让一些人少走一些弯路,如果有人实现了h3和h4的混合使用,还望赐教。
posted @ 2016-04-23 09:40  Asher鑫与  阅读(270)  评论(0编辑  收藏  举报