【SSI开发总结.1】struts2整合spring

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在Struts2中整合Spring的IoC支持是一件十分简单的事情。让我们一步一步来实现：
1）复制class="tags" href="/tags/STRUTS.html" title=struts>struts2-class="tags" href="/tags/SPRING.html" title=spring>spring-plugin-x-x-x.jar和相应的class="tags" href="/tags/SPRING.html" title=spring>spring.jar到/WEB-INF/lib目录下。
2）在class="tags" href="/tags/STRUTS.html" title=struts>struts.properties中设置class="tags" href="/tags/STRUTS.html" title=struts>struts.objectFactory属性值

class="tags" href="/tags/STRUTS.html" title=struts>struts.properties

class="tags" href="/tags/STRUTS.html" title=struts>struts.objectFactory = class="tags" href="/tags/SPRING.html" title=spring>spring

或者是在XML文件中进行常量配置

class="tags" href="/tags/STRUTS.html" title=struts>struts.xml

<class="tags" href="/tags/STRUTS.html" title=struts>struts>

           <constant name="class="tags" href="/tags/STRUTS.html" title=struts>struts.objectFactory" value="class="tags" href="/tags/SPRING.html" title=spring>spring" />

</class="tags" href="/tags/STRUTS.html" title=struts>struts>

3）配置Spring监听器

web.xml

<listener>

           <listener-class>org.class="tags" href="/tags/SPRING.html" title=spring>springframework.web.context.ContextLoaderListenerclass="code-tag"></listener-class>

</listener>

通过Spring配置来注册对象

applicationContext.xml

<?xml version=class="code-quote">"1.0"
 class="tags" href="/tags/ENCODING.html" title=encoding>encoding="UTF-8"?>

<!DOCTYPE class="tags" href="/tags/BEAN.html" title=bean>beans PUBLIC 

           "-//SPRING//DTD BEAN//EN"

           "http://www.class="tags" href="/tags/SPRING.html" title=spring>springframework.org/dtd/class="tags" href="/tags/SPRING.html" title=spring>spring-class="tags" href="/tags/BEAN.html" title=bean>beans.dtd">

<class="tags" href="/tags/BEAN.html" title=bean>beans default-autowire="byName">

           <class="tags" href="/tags/BEAN.html" title=bean>bean id="personManager" class="com.acme.PersonManager"/>

</class="tags" href="/tags/BEAN.html" title=bean>beans>

当然你也可以拥有更多的Spring配置文件。在web.xml中进行下列设置，从而使Spring的ApplicationContext通过匹配所给定模式的文件来初始化对象

<!-- 用来定位Spring XML文件的上下文配置 -->

<context-param>

           <param-name>contextConfigLocationclass="code-tag"></param-name>

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

</context-param>

4）修改你的Struts配置文件

class="tags" href="/tags/STRUTS.html" title=struts>struts.xml

<!DOCTYPE class="tags" href="/tags/STRUTS.html" title=struts>struts PUBLIC

           "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"

           "http://class="tags" href="/tags/STRUTS.html" title=struts>struts.apache.org/dtds/class="tags" href="/tags/STRUTS.html" title=struts>struts-2.0.dtd">

<class="tags" href="/tags/STRUTS.html" title=struts>struts>

           <include file="class="tags" href="/tags/STRUTS.html" title=struts>struts-default.xml"/>

           <package name="default" extends="class="tags" href="/tags/STRUTS.html" title=struts>struts-default">

               <class="tags" href="/tags/ACTION.html" title=action>action name="foo" class="com.acme.Foo">

                   <result>foo.ftl</result>

               </class="tags" href="/tags/ACTION.html" title=action>action>

           </package>

           <package name="secure" namespace="/secure" extends="default">

               <class="tags" href="/tags/ACTION.html" title=action>action name="bar" class="bar">

                   <result>bar.ftl</result>

               </class="tags" href="/tags/ACTION.html" title=action>action>

           </package>

</class="tags" href="/tags/STRUTS.html" title=struts>struts>

默认情况下，Spring从下面的文件中寻找为bar所做的配置

applicationConext.xml

<?xml version="1.0" class="tags" href="/tags/ENCODING.html" title=encoding>encoding="UTF-8"?>

<!DOCTYPE class="tags" href="/tags/BEAN.html" title=bean>beans PUBLIC 

           "-//SPRING//DTD BEAN//EN"

           "http://www.class="tags" href="/tags/SPRING.html" title=spring>springframework.org/dtd/class="tags" href="/tags/SPRING.html" title=spring>spring-class="tags" href="/tags/BEAN.html" title=bean>beans.dtd">

<class="tags" href="/tags/BEAN.html" title=bean>beans default-autowire="byName">

           <class="tags" href="/tags/BEAN.html" title=bean>bean id="bar" class="com.my.BarClass" singleton="false"/>

           ...

</class="tags" href="/tags/BEAN.html" title=bean>beans>

5）好了，现在你的Struts2和Spring就能正常的一起工作了。有几个配置技术点需要详细说明下：装配模式。你可以通过设置修改class="tags" href="/tags/STRUTS.html" title=struts>struts.properties中下列属性的值来改变装配模式。

class="language-java">class="tags" href="/tags/STRUTS.html" title=struts>struts.objectFactory.class="tags" href="/tags/SPRING.html" title=spring>spring.autoWire = type

该参数可供选择的设置值有

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name	按照你的class="tags" href="/tags/ACTION.html" title=action>action的属性的名字和Spring里的class="tags" href="/tags/BEAN.html" title=bean>bean的名字匹配，如果匹配就自动装配。这是缺省的
type	按照你的class="tags" href="/tags/ACTION.html" title=action>action的属性的类型，在Spring注册的class="tags" href="/tags/BEAN.html" title=bean>bean中查找，如果相同就自动装配。这需要你在Spring中仅注册了一个此类型的class="tags" href="/tags/BEAN.html" title=bean>bean
auto	Spring会试图自动监测来找到最好的方法自动装配你的class="tags" href="/tags/ACTION.html" title=action>action
constructor	Spring会自动装配class="tags" href="/tags/BEAN.html" title=bean>bean的构造函数的参数

是否使用类缓存。你可以通过设置修改class="tags" href="/tags/STRUTS.html" title=struts>struts.properties中下列属性的值来改变是否使用Spring自身的类缓存机制。可以设定的值为true或false，默认为true。

class="tags" href="/tags/STRUTS.html" title=struts>struts.objectFactory.class="tags" href="/tags/SPRING.html" title=spring>spring.useClassCache = false