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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框架七大模块简单介绍

Spring中MVC模块代码详解

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

以上就是本文关于Spring之WEB模块配置详解的全部内容,希望对大家有所帮助。感兴趣的朋友可以继续参阅本站其他相关专题,如有不足之处,欢迎留言指出。

参考:

浅谈Springmvc中的页面跳转问题

Spring AOP入门Demo分享

Spring框架web项目实战全代码分享

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