sshj2整合步骤

一,集成 Spring 与 Hibernate
	1,配置SessionFactory
		1,配置
			---------------------- applicationContext.xml ------------------------
			<!-- 配置SessionFactory(整合Hibernate) -->
			<context:property-placeholder location="classpath:jdbc.properties" />
			<bean id="sessionFactory"
				class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
				<property name="dataSource">
					<bean class="com.mchange.v2.c3p0.ComboPooledDataSource">
						<!-- 数据库连接信息 -->
						<property name="jdbcUrl" value="${jdbcUrl}"></property>
						<property name="driverClass" value="${driverClass}"></property>
						<property name="user" value="${username}"></property>
						<property name="password" value="${password}"></property>
						<!-- 其他配置 -->
						<property name="initialPoolSize" value="3"></property>
						<property name="maxPoolSize" value="5"></property>
						<property name="minPoolSize" value="3"></property>
						<property name="acquireIncrement" value="2"></property>
						<property name="maxStatements" value="8"></property>
						<property name="maxStatementsPerConnection" value="5"></property>
						<property name="maxIdleTime" value="20"></property>
					</bean>
				</property>
				<!-- 指定hibernate的配置文件的位置 -->
				<property name="configLocation" value="classpath:hibernate.cfg.xml"></property>
			</bean>
			---------------------- jdbc.properties配置文件的内容 ------------------------
			jdbcUrl = jdbc:mysql:///itcastoa
			driverClass = com.mysql.jdbc.Driver
			username = root
			password = 1234
		2,测试代码
			@Test// 测试 SessionFactory 的配置
			public void testSessionFactory(){
				SessionFactory sessionFactory = (SessionFactory) ac.getBean("sessionFactory");
				Assert.assertNotNull(sessionFactory.openSession());
			}
	2,配置声明式事务(使用基于注解的方式)
		1,配置
			<!-- 配置事务管理器 -->
			<bean id="transactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager">
				<property name="sessionFactory" ref="sessionFactory"></property>
			</bean>
			<!-- 配置基于注解的事务支持-->
			<tx:annotation-driven transaction-manager="transactionManager"/>
		2,测试代码
			1,Service类
				@Service
				public class InsertUserService {
					@Resource
					private SessionFactory sessionFactory;
					@Transactional
					public void addUsers() {
						sessionFactory.getCurrentSession().save(new User());
						// int a = 1 / 0; // 这行会抛异常
						sessionFactory.getCurrentSession().save(new User());
					}
				}
			2,单元测试
				@Test // 测试声明式事务
				public void testTransaction() {
					InsertUserService service = (InsertUserService) ac.getBean("insertUserService");
					service.addUsers();
				}
	3,在web.xml中配置 spring 的 OpenSessionInView 过滤器(解决抛LazyInitializationException的问题)
		1,配置
			<!-- 配置 spring 的 OpenSessionInView 过滤器 -->
			<filter>
				<filter-name>OpenSessionInView</filter-name>
				<filter-class>org.springframework.orm.hibernate3.support.OpenSessionInViewFilter</filter-class>
			</filter>
			<filter-mapping>
				<filter-name>OpenSessionInView</filter-name>
				<url-pattern>*.action</url-pattern>
			</filter-mapping>
		2,LazyInitializationException异常说明
			1,对于集合属性,默认是lazy="true"的,在第一次使用时才加载。
			2,但在加载时,如果Session已经关掉了就会抛LazyInitializationException异常

二,集成 Spring 与 Struts2.1.8.1
	1,在web.xml配置监听器(Spring Reference 15.2 Common configuration)
		<!-- 集成Spring -->
		<listener>
			<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
		</listener>
		<context-param>
			<param-name>contextConfigLocation</param-name>
			<param-value>/WEB-INF/classes/applicationContext*.xml</param-value>
		</context-param>
	2,拷贝一个用于整合的jar包(与Spring整合用的一个插件)
		struts-2.1.8.1/lib/struts2-spring-plugin-2.1.8.1.jar
	3,测试
		1,写Action类与Service类
			@Controller("testAction")
			@Scope("prototype")
			public class TestAction extends ActionSupport {
				@Resource
				private TestService testService;
				@Override
				public String execute(){
					testService.saveTwoUser();
					return SUCCESS;
				}
			}
			@Service
			public class TestService {
				@Resource
				private SessionFactory sessionFactory;
				@Transactional
				public void saveTwoUser() {
					sessionFactory.getCurrentSession().save(new User());
					// int a = 1 / 0; // 这行会抛异常
					sessionFactory.getCurrentSession().save(new User());
				}
			}
		2,在struts.xml中配置Action
			<!-- 测试 -->
			<action name="test" class="testAction">
				<result>/test.jsp</result>
			</action>
		3,部署到Tomcat中并访问测试。

	4,说明:
		1,在写Action时要指定 @Controller 与 @Scope("prototype")
		2,在struts.xml中配置action时,在class属性中写bean的名称
		
三,整合Spring与Jbpm4(jBPM4.4 Developers Guide, Chapter 17. Spring Integration)	
	1,在jbpm.cfg.xml中
		1,删除配置:
			<import resource="jbpm.tx.hibernate.cfg.xml" />
		2,增加配置:
			<!-- 整合Spring -->
			<import resource="jbpm.tx.spring.cfg.xml" />
	2,在applicationContext.xml中配置
		<!-- 配置ProcessEngine(整合jBPM4) -->
		<bean id="springHelper" class="org.jbpm.pvm.internal.processengine.SpringHelper">
			<!-- jbpmCfg是相对于classpath的相对路径,默认值为jbpm.cfg.xml -->
			<property name="jbpmCfg" value="jbpm.cfg.xml"></property>
		</bean>
		<bean id="processEngine" factory-bean="springHelper" factory-method="createProcessEngine" />
	3,测试
		@Test // 测试ProcessEngine
		public void testProcessEngine() {
			ProcessEngine processEngine = (ProcessEngine) ac.getBean("processEngine");
			Assert.assertNotNull(processEngine);
		}

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