struts2.2.1+spring 3.0.3+hibernate3.6+dwr3.0全注解整合详解

今天搭建了一个ssh+dwr框架，其实ssh框架配置和以前差不多,主要是使用了注解实现C和M层,下面就是web.xml配置

<?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" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"id="WebApp_ID" version="2.5"><display-name>nwr-web</display-name><context-param><param-name>contextConfigLocation</param-name><param-value>classpath*:applicationContext*.xml</param-value></context-param><context-param><param-name>log4jConfigLocation</param-name><param-value>/WEB-INF/classes/log4j.properties</param-value></context-param><context-param><param-name>log4jRefreshInterval</param-name><param-value>60000</param-value></context-param><listener><listener-class>org.springframework.web.context.ContextLoaderListener</listener-class></listener><listener><listener-class>org.springframework.web.util.Log4jConfigListener</listener-class></listener><filter><filter-name>struts-prepare</filter-name><filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareFilter</filter-class><init-param><param-name>actionPackages</param-name><param-value>com.essential.action</param-value></init-param></filter><filter><filter-name>struts-execute</filter-name><filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsExecuteFilter</filter-class></filter><servlet><servlet-name>dwr</servlet-name><servlet-class>org.directwebremoting.spring.DwrSpringServlet</servlet-class><init-param><param-name>debug</param-name><param-value>true</param-value></init-param></servlet><filter-mapping><filter-name>struts-prepare</filter-name><url-pattern>/*</url-pattern></filter-mapping><filter-mapping><filter-name>struts-execute</filter-name><url-pattern>/*</url-pattern></filter-mapping><filter><filter-name>characterEncodingFilter</filter-name><filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class><init-param><param-name>encoding</param-name><param-value>UTF-8</param-value></init-param><init-param><param-name>forceEncoding</param-name><param-value>true</param-value></init-param></filter><filter-mapping><filter-name>characterEncodingFilter</filter-name><url-pattern>/*</url-pattern></filter-mapping><servlet-mapping><servlet-name>dwr</servlet-name><url-pattern>/dwr/*</url-pattern></servlet-mapping><welcome-file-list><welcome-file>News.jsp</welcome-file></welcome-file-list><error-page><error-code>500</error-code><location>/error.jsp</location></error-page><error-page><error-code>402</error-code><location>/error.jsp</location></error-page></web-app>

唯一需要说明一下的就是如果要使用struts2的注解就必须在配置filter的时候带上actionPackages的参数，这个参数就是设置struts2容器搜索action的包路径。

下面是struts.xml的配置文件：

<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE struts PUBLIC    "-//Apache Software Foundation//DTD Struts Configuration 2.1.7//EN"    "http://struts.apache.org/dtds/struts-2.1.7.dtd"><struts><package name="default" extends="struts-default"><global-results><result name="error">error.jsp</result><result name="input">error.jsp</result></global-results></package><constant name="struts.convention.default.parent.package"value="default" /></struts>

我是用的struts.convention插件把所有action的父包都定义为我自定义的一个default包，大家也可以自定义其它父包，这样定义的父包是所有action的默认父包，当然你也可以使用@package标签为action类定义不同的包。

下面介绍spring的配置文件：

<?xml version="1.0" encoding="UTF-8"?><beans xmlns="http://www.springframework.org/schema/beans"xmlns:context="http://www.springframework.org/schema/context"xmlns:dwr = "http://www.directwebremoting.org/schema/spring-dwr"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop"xmlns:tx="http://www.springframework.org/schema/tx"xsi:schemaLocation="       http://www.springframework.org/schema/beans        http://www.springframework.org/schema/beans/spring-beans-3.0.xsd       http://www.springframework.org/schema/context        http://www.springframework.org/schema/context/spring-context-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        http://www.directwebremoting.org/schema/spring-dwr        http://www.directwebremoting.org/schema/spring-dwr-3.0.xsd"       >    <dwr:annotation-scan scanRemoteProxy="true" base-package="com.essential.dwr"/>    <dwr:annotation-scan scanDataTransferObject="true" base-package="com.essential.entity"/><context:component-scan base-package="com.essential" />    <bean id="configurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">        <property name="locations">           <value>classpath*:init.properties</value>        </property>    </bean><bean id="mainDataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close">   <property name="driverClass" value="${jdbc.driverClass}"></property>       <property name="jdbcUrl" value="${jdbc.jdbcUrl}"></property>       <property name="user" value="${jdbc.user}"></property>       <property name="password" value="${jdbc.password}"></property>         <property name="maxPoolSize" value="${jdbc.maxPoolSize}"></property>       <property name="minPoolSize" value="${jdbc.minPoolSize}"></property>       <property name="initialPoolSize" value="${jdbc.initialPoolSize}"></property>       <property name="idleConnectionTestPeriod" value="${jdbc.idleConnectionTestPeriod}"></property>       <property name="maxIdleTime" value="${jdbc.maxIdleTime}"></property>       <property name="acquireIncrement" value="${jdbc.acquireIncrement}"/>    </bean><bean id="dataSource"class="org.springframework.jdbc.datasource.LazyConnectionDataSourceProxy"><property name="targetDataSource"><ref local="mainDataSource" /></property></bean><bean id="sessionFactory"class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean"><property name="dataSource"><ref bean="dataSource" /></property><property name="hibernateProperties"><props><prop key="hibernate.dialect">${hibernate.dialect}</prop><prop key="hibernate.show_sql">${hibernate.show_sql}</prop><prop key="hibernate.format_sql">${hibernate.format_sql}</prop><prop key="hibernate.use_sql_comments">${hibernate.use_sql_comments}</prop><prop key="hibernate.jdbc.batch_size">${hibernate.jdbc.batch_size}</prop></props></property><property name="packagesToScan" value="${hibernate.packagesToScan}" /></bean><bean id="transactionManager"class="org.springframework.orm.hibernate3.HibernateTransactionManager"><property name="sessionFactory"><ref local="sessionFactory" /></property></bean><tx:advice id="txAdvice" transaction-manager="transactionManager"><tx:attributes><tx:method name="upd*" propagation="REQUIRED" read-only="false" /><tx:method name="del*" propagation="REQUIRED" read-only="false" /><tx:method name="add*" propagation="REQUIRED" read-only="false" /><tx:method name="insert*" propagation="REQUIRED" read-only="false" /><tx:method name="find*" propagation="SUPPORTS" read-only="true" /><tx:method name="query*" propagation="SUPPORTS" read-only="true" /><tx:method name="*" propagation="SUPPORTS" read-only="true" /></tx:attributes></tx:advice><aop:config><aop:pointcut id="productServiceMethods"expression="${spring.execution}" /><aop:advisor advice-ref="txAdvice" pointcut-ref="productServiceMethods" /></aop:config></beans>

首先前两行配置是dwr和spring整合的配置第一个是配置dwr的远程代理对象的所在的包名,第二个则是dwr里的传输对象所在的包名。

下面一行是spring搜索bean的包名。下面其他的配置和以前没什么变化。

现在来讲讲struts2的action用注解怎么实现：

1.其实注解和xml配置步骤差不多首先肯定是配置包,但是我们前面用struts.convention配置了默认包，所以也不用再配置，然后肯定是配置访问的虚拟路劲咯，也就是配置namespace,使用@Namespace(value = "/mail")标签配置，value属性是配置namespace的路径。

2.配置好了namespace然后就是action咯,配置这个是使用@Action(value = "sendMail", results = { @Result(name = SUCCESS, type = "redirect", location = "../News.jsp") })标签，其中value是配置action的路径，results是配置action的处理结果跳转页面，也可以配置多个页面。

这样就配置好了一个完整的action咯，我们现在要和spring整合就必须调用spring的bean，要调用bean很简单定义一个私有变量，然后在变量上使用@resource标签就行了，但是需要注意的是这里的变量名必须和后面要讲到的@service标签中的名字要一致才行，不然注入不进来。

下面附上一个例子:

public class ActivityAction extends BaseAction {/** *  */private static final long serialVersionUID = 5488332603981342055L;private long uid;private long eventId;private ActivityService activityService;/** * 查询活动列表 *  * @return * @throws Exception */@Action(value = "findActivityList")public String findActivityList() throws Exception {List<ActivityVo> activityVos = activityService.findActivityList();String result = ListToJsonString(activityVos);toWrite(result);return null;}/** * 参加活动 *  * @return * @throws Exception */@Action(value = "joinActivity")public String joinActivity() throws Exception {boolean isSucc = activityService.insertActivityForUser(eventId, uid);toWrite(isSucc + "");return null;}/** * 根据用户标识查找活动列表 *  * @return 我的活动列表 * @throws Exception */@Action(value = "findMyActivityList")public String findMyActivityList() throws Exception {List<ActivityVo> activityVos = activityService.findMyActivityList(uid);String result = ListToJsonString(activityVos);toWrite(result);return null;}@Resourcepublic void setActivityService(ActivityService activityService) {this.activityService = activityService;}public void setUid(long uid) {this.uid = uid;}public void setEventId(long eventId) {this.eventId = eventId;}}

然后来讲讲service的配置，配置方法是使用@service(value="serviceName")标签设置service,很简单不用多讲,而且调用dao的时候和action调用service一样使用@resource标签引入属性就行了，下面是例子源码：

@Service(value = "activityService")public class ActivityServiceImpl implements ActivityService {@ResourceActivityDao activityDao;private DateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");@Overridepublic boolean insertActivityForUser(long eventId, long uid) {return activityDao.insertActivityForUser(eventId, uid);}@Overridepublic List<ActivityVo> findActivityList() {List<Activity> list = activityDao.findActivityList();List<ActivityVo> activityVos = new ArrayList<ActivityVo>();for (Activity activity : list) {ActivityVo activityVo = new ActivityVo();activityVo.setId(activity.getId());activityVo.setTitle(activity.getTitle());activityVo.setPublishTime(df.format(activity.getPublishTime()));activityVo.setImagurl(activity.getImagurl());activityVo.setContent(activity.getContent());activityVos.add(activityVo);}return activityVos;}@Overridepublic List<ActivityVo> findMyActivityList(long uid) {List<Activity> list = activityDao.findMyActivityList(uid);List<ActivityVo> activityVos = new ArrayList<ActivityVo>();for (Activity activity : list) {ActivityVo activityVo = new ActivityVo();activityVo.setId(activity.getId());activityVo.setTitle(activity.getTitle());activityVo.setPublishTime(df.format(activity.getPublishTime()));activityVo.setImagurl(activity.getImagurl());activityVo.setDatetime(activity.getDatetime());activityVo.setDescription(activity.getDescription());activityVo.setContent(activity.getContent());activityVos.add(activityVo);}return activityVos;}}

然后就是dao的配置和前面的差不多就是定义dao的时候是用@repository标签，直接贴代码就行了：

@Repository(value = "activityDao")public class ActivityDao extends BaseDao<Activity> {/** * 参加活动 *  * @param eventId *            活动ID * @param uid *            用户ID * @return 成功返回true,失败返回false */@SuppressWarnings("unchecked")public boolean insertActivityForUser(long eventId, long uid) {Session session = getSession();Query query = session.createSQLQuery("select au.aid from activity_users au where au.aid=:aid and au.uid=:uid");List list = query.setParameter("uid", uid).setParameter("aid", eventId).list();if (list.size() > 0) {return false;} else {session.createSQLQuery("insert into activity_users(aid,uid) values(:aid,:uid)").setParameter("uid", uid).setParameter("aid", eventId).executeUpdate();return true;}}/** * 查询活动列表 *  * @return 活动列表 */@SuppressWarnings("unchecked")public List<Activity> findActivityList() {Session session = getSession();List<Activity> list = session.createQuery("from Activity where status = 2 order by publishTime desc").setMaxResults(10).list();return list;}/** * 根据用户标识查询用户参加的所有活动 *  * @param uid *            用户标识 * @return 活动列表 */@SuppressWarnings("unchecked")public List<Activity> findMyActivityList(final long uid) {return getHibernateTemplate().execute(new HibernateCallback() {@Overridepublic Object doInHibernate(Session session)throws HibernateException, SQLException {List<Activity> list = session.createQuery("select a from Activity a left join a.users u where u.id=:uid order by a.publishTime desc").setParameter("uid", uid).list();return list;}});}}

下面是BaseDao的代码：

public class BaseDao<E> extends HibernateDaoSupport {@Resource(name = "sessionFactory")public void setInjectionSessionFacotry(SessionFactory sessionFacotry) {super.setSessionFactory(sessionFacotry);}@PostConstructpublic void injectSessionFactory() {logger.info(super.getSessionFactory());}public Serializable save(E entity) {return getHibernateTemplate().save(entity);}public void update(E entity) {getHibernateTemplate().update(entity);}public void delete(E entity) {getHibernateTemplate().delete(entity);}public User query(long id) {return getHibernateTemplate().get(User.class, id);}}

在这个类里面注入sessionFactory对象。

下面来讲讲dwr的配置，要配置dwr的远程代理对象在类上使用@RemoteProxy类中的方法@RemoteMethod这样在javascript中直接用类名+方法名直接调用就行了。如果要调用spring的bean和上面一样,就不不多说。如果dwr和jsp页面传输的时候需要用到java实体那么就在需要传输的实体类上用@DataTransferObject标签，才能正确转换类型，不然会报异常。下面是例子：

@RemoteProxypublic class TestDwr implements Serializable {/** *  */private static final long serialVersionUID = -2060851629180328131L;@RemoteMethodpublic String testDwr() {return "测试.";}}

实体的例子大家可以随便定义一个类就行了加上标签就OK，这里就不列出来了。

下面是jsp使用dwr必须引入3个jsp：

<script type="text/javascript" src="<%=path %>/dwr/engine.js"></script><script type="text/javascript" src="<%=path %>/dwr/util.js"></script>

<script type="text/javascript" src="<%=path %>/dwr/interface/TestDwr .js"></script>

前面2个是dwr必须要使用的2个js包，后面一个就是你在java中定义的类.这样就可以调用里面的方法了。

 

到这里全部讲完了，有什么不足的地方还请各位多补充。

所有jar包已经上传，需要的可以去下载http://download.csdn.net/detail/yaoyeyzq/4516689