SSH整合的几种最常见方式 .

Spring实例Action的两种方式:

1、DelegatingActionProxy类整个Action由Spring实例2、DelegatingRequestProcessor类extends RequestProcessor重写processActionCreate方法,由Spring创建

web.xml

<context-param>

<param-name>contextConfigLocation</param-name>

<param-value>classpath*:applicationContext.xml</param-value>

</context-param>

<listener>

<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>

</listener>

SSH整合第一式:缺点:麻烦一个方法对应一个<bean>如何实现整合的:

重写了Action类的execute方法,使用Spring容器来实例bean,查找bean的名字是<actionpath="">的值

①struts-config.xml

<action……

path="/doSave"

type="org.springframework.web.struts.DelegatingActionProxy">

</action>

②applicationContext.xml

<beanname="/doSave"class="com.yourcompany.struts.action.UserinfoAction">

<propertyname="manager"ref="userInfoManager"></property>

</bean>

注解:name="/doSave" 取得时<action path="/doSave" />

SSH整合第二式:第一式的延伸,使用MyDelegatingActionProxy类继承DelegatingActionProxy和DispatchAction类

缺点:实现起来太繁琐;优点:一个Action类对应一个<bean>

①struts-config.xml

<action……

type="com.yourcompany.struts.action.UserinfoAction">

</action>

②applicationContext.xml

<beanname="com.yourcompany.struts.action.UserinfoAction"class="com.yourcompany.struts.action.UserinfoAction">

<propertyname="manager"ref="userInfoManager"></property>

</bean>

③ActionextendsMyDelegatingActionProxy

注解:

1、如果不继承DispatchAction类的话就会产生死循环调用execute方法的问题。

DelegatingActionProxy类的作用:改变Action类的创建方式,改成由Spring容器创建的

DispatchAction类的作用:把execute方法分解成多个普通方法执行

2、屏蔽死循环问题必须在MyDelegatingActionProxy类重写execute方法一下是此类的关键代码:

publicActionForwardexecute(ActionMappingmapping,ActionFormform,

HttpServletRequestrequest,HttpServletResponseresponse)

throwsException{

ActiondelegateAction=getDelegateAction(mapping);

Stringparameter=getParameter(mapping,form,request,response);

Stringname=getMethodName(mapping,form,request,response,parameter);

returndispatchMethod(mapping,form,request,response,name,

delegateAction);

 }

SSH整合第三式:使用DelegatingRequestProcessor类

缺点:一个方法一个<bean>

①struts-config.xml

<action……

type="com.yourcompany.struts.action.UserinfoAction">

</action>

<controller>

<set-propertyproperty="processorClass"value="org.springframework.web.struts.DelegatingRequestProcessor"/>

</controller>

②applicationContext.xml

<beanname="/doSave"class="com.yourcompany.struts.action.UserinfoAction">

<propertyname="manager"ref="userInfoManager"></property>

</bean>

注解:name="/doSave" 取得时<action path="/doSave" />

SSH整合第四式:自定义MyDelegatingRequestProcessor类extendsDelegatingRequestProcessor,重写determineActionBeanName方法,returnmapping.getType();

优点:一个Action对应一个<bean>,[推荐,常用]

①struts-config.xml

<action……

type="com.yourcompany.struts.action.UserinfoAction">

</action>

<controller>

<set-propertyproperty="processorClass"value="MyDelegatingRequestProcessor类路径"/>

</controller>

②applicationContext.xml

<beanname="com.yourcompany.struts.action.UserinfoAction"class="com.yourcompany.struts.action.UserinfoAction">

<propertyname="manager"ref="userInfoManager"></property>

</bean>

SSH整合第五式:继承ActionSupport、DispatchActionSupport、MappingDispatchActionSupport

①struts-config.xml

<action……

type="com.yourcompany.struts.action.UserinfoAction">

</action>

②applicationContext.xml

<beanname="com.yourcompany.struts.action.UserinfoAction"class="com.yourcompany.struts.action.UserinfoAction"/>

<beanid="userinfoManager"class="com.yourcompany.struts.action.UserinfoAction"/>

注解:UserInfoActionextendsMappingDispatchActionSupport实现onInit方法

manager=(IUserInfoManager)getWebApplicationContext().getBean("userInfoManager");

不需要set方法

问1:这段代码在什么时候执行,起什么作用?

<controller>

<set-propertyproperty="processorClass"value="org.springframework.web.struts.DelegatingActionProxy"/>

</controller>

答:在ActionServlet类的process方法中

RequestProcessor processor = getProcessorForModule(config);读取返回一个RequestProcessor对象,如果没有配置的话就会采取默认的,也就是Struts的核心类RequestProcessor

问2:ContextLoaderPlugIn类的作用,如何使用?

答:在struts-config.xml中配置

<plug-inclassname="org.springframework.web.struts.ContextLoaderPlugIn">

<set-propertyproperty="contextConfigLication"value="/WEB-INF/classes/applicationContext.xml"/>

</plug-in>

相当于再web.xml中配置

<context-param>

<param-name>contextConfigLocation</param-name>

<param-value>classpath*:applicationContext.xml</param-value>

</context-param>

道理是相同的。

一般是配置在web.xml中。

ssh

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