spring备忘录

◆◆spring中映射*.hbm.xml文件
通常在spring中会这么写代码：

<bean id="sessionFactory"
    class="org.springframework.orm.hibernate.LocalSessionFactoryBean">
    <property name="mappingResources">
        <list>
            <value>Student.hbm.xml</value>
            <value>Course.hbm.xml</value>
            …
        </list>
    </property>
    …
</bean>

如果.hbm.xml文件很多时，则写起来会很不方便，可以像下面这种写法就简单多了：
(其中假设所有的.hbm.xml文件都存于
com/model/system/hibernate-config和com/model/base/hibernate-config目录)

<bean id="sessionFactory" 
    class="org.springframework.orm.hibernate.LocalSessionFactoryBean">
    <property name="mappingDirectoryLocations">
        <list>
            <value>classpath*:/com/model/**/hibernate-config</value>
        </list>
    </property>
    …
</bean>

◆◆spring-2.5中@Component和@Autowired注解的使用
bean的定义：

package com.xznsoft;

@Component
public class Dao {
	...
}

bean的注入

package com.xznsoft;

public class Service {
	@Autowired
	private Dao dao;

	...
}

使用@Component和@Autowired注解需要在applicationContext.xml中配置：

<!-- Bean定义和自动注入  -->
<context:component-scan base-package="com.xznsoft" />

◆◆struts2中通过spring手动注入bean

public class SimpleAction extends ActionSupport {

	private Service service;

	@Override
	public String execute() throws Exception {
		ApplicationContext ac = WebApplicationContextUtils.getWebApplicationContext(ServletActionContext.getServletContext());
		service = (Service) ac.getBean("service");
		...
	}

}

◆◆spring-2.5.6 applicationContext.xml

<?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:p="http://www.springframework.org/schema/p"
	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-2.5.xsd
	http://www.springframework.org/schema/context
	http://www.springframework.org/schema/context/spring-context-2.5.xsd
	http://www.springframework.org/schema/tx
	http://www.springframework.org/schema/tx/spring-tx-2.5.xsd">

	<!-- 属性文件读入  -->
	<context:property-placeholder location="classpath:jdbc.properties" />
	
	<!-- 数据源配置,主要用于开发测试环境  -->
	<bean id="dataSource"
		class="org.springframework.jdbc.datasource.DriverManagerDataSource"
		p:driverClassName="${jdbc.driverClassName}" p:url="${jdbc.url}"
		p:username="${jdbc.username}" p:password="${jdbc.password}" />
	
	<!-- Hibernate配置  -->
	<bean id="sessionFactory"
		class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">
		<property name="dataSource" ref="dataSource" />
		<property name="hibernateProperties">
			<props>
				<prop key="hibernate.dialect">${hibernate.dialect}</prop>
				<prop key="hibernate.show_sql">${hibernate.show_sql}</prop>
				<prop key="hibernate.cache.use_query_cache">${hibernate.cache.use_query_cache}</prop>
				<prop key="hibernate.cache.provider_class">${hibernate.cache.provider_class}</prop>
			</props>
		</property>
		<property name="packagesToScan" value="com.xznsoft.*.entity" />
	</bean>
	
	<!-- 事务配置  -->
	<bean id="transactionManager"
		class="org.springframework.orm.hibernate3.HibernateTransactionManager">
		<property name="sessionFactory" ref="sessionFactory" />
	</bean>
	
	<!-- 使用annotation定义事务  -->
	<tx:annotation-driven transaction-manager="transactionManager" />
	
	<!-- Bean定义和自动注入  -->
	<context:component-scan base-package="com.xznsoft">
		<context:exclude-filter type="regex"
			expression="com\.xznsoft\..*\.(entity|helper)" />
	</context:component-scan>
</beans>