Spring之WEB模块 Spring之WEB模块配置详解
冰河winner 人气:0想了解Spring之WEB模块配置详解的相关内容吗，冰河winner在本文为您仔细讲解Spring之WEB模块的相关知识和一些Code实例，欢迎阅读和指正，我们先划重点：spring,web模块,web.xml,spring,配置,web.xml配置springmvc,springmvc,多模块配置，下面大家一起来学习吧。
Spring的WEB模块用于整合Web框架，例如Struts1、Struts2、JSF等
整合Struts1
继承方式
Spring框架提供了ActionSupport类支持Struts1的Action。继承了ActionSupport后就能获取Spring的BeanFactory，从而获得各种Spring容器内的各种资源
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加载Spring配置文件-->
<listener-class>
org.springframework.web.context.ContextLoaderListener
</listener-class>
</listener>
<filter><!-- 使用Spring自带的字符过滤器-->
<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>
如果与Hibernate结合使用，需要在web.xml中添加OpenSessionInViewFilter过滤器，将session范围扩大到JSP层，防止抛出延迟加载异常
<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><!-- 对Struts 1的Action启用--> </filter-mapping>
代理方式
继承方式融入Spring非常简单，但是缺点是代码与Spring发生了耦合，并且Action并没有交给Spring管理，因此不能使用Spring的AOP、IoC特性，使用代理方式则可以避免这些缺陷
public class CatAction extends Action{ //此处继承的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");
}
}
这个Action没有与Spring发生耦合，只是定义了一个ICatService属性，然后由Spring负责注入
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，该配置把Struts的Action交给Spring代理-->
<controller processorClass="org.springframework.web.struts.DelegatingRequestProcessor" />
<!-- controller配置生效后，Action的type属性就是去作用了，Struts不会用type属性指定的类来创建CatAction，而是到Spring配置中寻找，因此Spring中必须配置CatAction -->
<!-- Spring中配置Action使用的是name属性而不是id，Spring会截获"/cat.do"的请求，将catService通过setter方法注入到CatAction中，并调用execute()方法-->
<bean name="/cat" class=" com.clf.spring.CatAction">
<property name="catService" ref="catService" />
</bean>
web.xml的配置与上面的继承方式相同
使用代理方式的Action可以配置拦截器等Spring特性，例如给CatAction配置方法前拦截器和返回后拦截器
<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，还需要<contstant/>添加名为struts.objectFactory的常量，把值设为spring，表示该Action由Spring产生。然后把<action/>的class属性改为catAction，Struts2将会到Spring中寻找名为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加载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>
总结
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