首页 > 代码库 > 项目记录2:整合SSH2
项目记录2:整合SSH2
本文内容来自:《传智播客-OA项目》
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="http://www.mamicode.com/${jdbcUrl}"></property>
<property name="driverClass" value="http://www.mamicode.com/${driverClass}"></property>
<property name="user" value="http://www.mamicode.com/${username}"></property>
<property name="password" value="http://www.mamicode.com/${password}"></property>
<!-- 其他配置 -->
<property name="initialPoolSize" value="http://www.mamicode.com/3"></property>
<property name="maxPoolSize" value="http://www.mamicode.com/5"></property>
<property name="minPoolSize" value="http://www.mamicode.com/3"></property>
<property name="acquireIncrement" value="http://www.mamicode.com/2"></property>
<property name="maxStatements" value="http://www.mamicode.com/8"></property>
<property name="maxStatementsPerConnection" value="http://www.mamicode.com/5"></property>
<property name="maxIdleTime" value="http://www.mamicode.com/20"></property>
</bean>
</property>
<!-- 指定hibernate的配置文件的位置 -->
<property name="configLocation" value="http://www.mamicode.com/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="http://www.mamicode.com/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);
}