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;   }     @Resource   public 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 {     @Resource   ActivityDao activityDao;     private DateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");     @Override   public boolean insertActivityForUser(long eventId, long uid) {    return activityDao.insertActivityForUser(eventId, uid);   }     @Override   public 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;   }     @Override   public 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() {       @Override     public 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);   }     @PostConstruct   public 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：

@RemoteProxy  public class TestDwr implements Serializable {     /**    *     */   private static final long serialVersionUID = -2060851629180328131L;     @RemoteMethod   public 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。

 转自：http://blog.csdn.net/yaoyeyzq/article/details/6623571