Spring的WEB模塊用于整合Web框架，例如Struts1、Struts2、JSF等
整合Struts1
繼承方式
Spring框架提供了ActionSupport類支持Struts1的Action。繼承了ActionSupport后就能獲取Spring的BeanFactory，從而獲得各種Spring容器內的各種資源
import org.springframework.web.struts.ActionSupport; public class CatAction extends ActionSupport{ public ICatService getCarService(){ return (ICatService) getWebApplicationContext().getBean("catService"); } public ActionForward execute(ActionMappingmapping,ActionForm form,HttpServletRequest request,HttpServletResponseresponse){ CatForm catForm = (CatForm) form; if("list".equals(catForm.getAction())){ returnthis.list(mapping,form,request,response); } } public ActionForward list(ActionMappingmapping,ActionForm form,HttpServletRequest request,HttpServletResponseresponse){ CatForm catForm = (CatForm) form; ICatService catService =getCatService(); List<Cat> catList =catService.listCats(); request.setAttribute("carList",catList); return mapping.find("list"); } } Spring在web.xml中的配置
<context-param><!-- Spring配置文件的位置--> <param-name>contextConfigLocation</param-name> <param-value>/WEB-INF/classes/applicationContext.xml</param-value> </context-param> <listener><!-- 使用Listener加載Spring配置文件--> <listener-class> org.springframework.web.context.ContextLoaderListener </listener-class> </listener> <filter><!-- 使用Spring自帶的字符過濾器--> <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>
如果與Hibernate結合使用，需要在web.xml中添加OpenSessionInViewFilter過濾器，將session范圍擴大到JSP層，防止拋出延遲加載異常
<filter> <filter-name>hibernateFilter</filter-name> <filter-class>org.springframework.orm.hibernate3.support. OpenSessionInViewFilter</filter-class> </filter> <filter-mapping> <filter-name> hibernateFilter</filter-name> <url-pattern>*.do</url-pattern><!-- 對Struts 1的Action啟用--> </filter-mapping>
代理方式
繼承方式融入Spring非常簡單，但是缺點是代碼與Spring發生了耦合，并且Action并沒有交給Spring管理，因此不能使用Spring的AOP、IoC特性，使用代理方式則可以避免這些缺陷
public class CatAction extends Action{ //此處繼承的Struts 1的Action private ICatService catService； //setter、getter略 public ActionForward execute(ActionMappingmapping,ActionForm form,HttpServletRequest request,HttpServletResponseresponse){ CatForm catForm = (CatForm) form; if("list".equals(catForm.getAction())){ returnthis.list(mapping,form,request,response); } } public ActionForward list(ActionMappingmapping,ActionForm form,HttpServletRequest request,HttpServletResponseresponse){ CatForm catForm = (CatForm) form; ICatService catService =getCatService(); List<Cat> catList =catService.listCats(); request.setAttribute("carList",catList); return mapping.find("list"); } } 這個Action沒有與Spring發生耦合，只是定義了一個ICatService屬性，然后由Spring負責注入
struts-congfig.xml配置
<form-beans> <form-bean name="catForm" type="com.clf.spring.CatForm"> </form-beans> <action-mappings> <action name=" catForm" path="/cat" type="com.clf.spring.CatAction"> <forward name="list" path="/jsp/listCat.jsp"></forward> </action> </action-mappings> <!-- 最核心的配置，該配置把Struts的Action交給Spring代理--> <controller processorClass="org.springframework.web.struts.DelegatingRequestProcessor" /> <!-- controller配置生效后，Action的type屬性就是去作用了，Struts不會用type屬性指定的類來創建CatAction，而是到Spring配置中尋找，因此Spring中必須配置CatAction --> <!-- Spring中配置Action使用的是name屬性而不是id，Spring會截獲"/cat.do"的請求，將catService通過setter方法注入到CatAction中，并調用execute()方法--> <bean name="/cat" class=" com.clf.spring.CatAction"> <property name="catService" ref="catService" /> </bean>
web.xml的配置與上面的繼承方式相同
使用代理方式的Action可以配置攔截器等Spring特性，例如給CatAction配置方法前攔截器和返回后攔截器
<bean id="catBeforeInterceptor" class="org.springframework.aop.support.NameMatchMethodPointcutAdvodor"> <property name="advice"> <bean class="com.clf.spring.MethodBeforeInterceptor" /> </property> <property name="mappedName" value="*"></property> </bean> <bean id="catAfterInterceptor" class="org.springframework.aop.support.NameMatchMethodPointcutAdvodor"> <property name="advice"> <bean class="com.clf.spring.MethodAfterInterceptor" /> </property> <property name="mappedName" value="*"></property> </bean> <bean name="/cat" class="org.springframework.aop.framework.ProxyFactoryBean"> <property name="interceptorNames"> <list> <value> catBeforeInterceptor</value> <value> catAfterInterceptor</value> </list> </property> <property name="target"> <bean class="com.clf.spring.CatAction"> <property name="catService" ref="catService"></property> </bean> </property> </bean>
整合Struts 2
Spring整合Struts 2需要struts2-spring-2.011.jar包
public class CatAction{ private ICatService catService; private Cat cat; //setter、getter略 public String list(){ catService.listCats(); return ＂list＂; } public String add(){ catService.createCat(cat); return list(); } } struts.xml配置
除了正常的配置之外，還需要<contstant/>添加名為struts.objectFactory的常量，把值設為spring，表示該Action由Spring產生。然后把<action/>的class屬性改為catAction，Struts2將會到Spring中尋找名為catAction的bean
<constant name=" struts.objectFactory" value="spring" /> <packagenamepackagename="cat" extends="struts-default"> <action name="*_cat" method="{1}" class="catAction"> <param name="action" >{1}</param> <result>/list.jsp</result> <result name="list">/list.jsp</result> </action> </package> Spring配置
<bean id="catAction" scope="prototype" class="com.clf.spring.CatAction"> <property name="catService" ref="catService"></property> </bean>
web.xml配置
<context-param><!-- Spring配置文件的位置--> <param-name>contextConfigLocation</param-name> <param-value>/WEB-INF/classes/applicationContext.xml</param-value> </context-param> <listener><!-- 使用Listener加載Spring配置文件--> <listener-class> org.springframework.web.context.ContextLoaderListener </listener-class> </listener> <filter> <filter-name>Struts2</filter-name> <filter-class>org.apache.struts2.dispatcher.FilterDispatcher</filter-class> </filter> <filter-mapping> <filter-name> Struts2</filter-name> <url-pattern>/*</url-pattern> </filter-mapping>
總結
以上就是本文關于Spring之WEB模塊配置詳解的全部內容，希望對大家有所幫助。感興趣的朋友可以繼續參閱本站其他相關專題，如有不足之處，歡迎留言指出。
新聞熱點
疑難解答
圖片精選
