溫習java:Struts與Spring整合

有一年多沒寫java了!快忘光了！現在手上有個項目，正好溫習一下！與把過去的東東晒晒！第一篇當數struts與spring的整合了！開源架構發展的很快，現在struts 2也普遍了。這篇整合講的是struts 1.29與spring 2.0。這種版本層次在現今的公司專屬應用程式還是蠻多的。都是被證實為很穩定的。

 

struts整合spring的方式一：

step 1:載入AppliationContext:
方式一:
web.xml
  <!-- Spring ApplicationContext設定檔的路徑 -->
  <context-param> 
         <param-name>contextConfigLocation</param-name> 
         <param-value>classpath*:spring/*.xml</param-value> 
  </context-param>
  <!-- Spring ApplicationContext 載入 -->
  <listener> 
         <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> 
  </listener>
 
  方式二:
  struts-config.xml
  <plug-in className="org.springframework.web.struts.ContextLoaderPlugIn">
        <set-property property="contextConfigLocation" value="/WEB-INF/spring-config/applicationContext.xml" />
  </plug-in>
 
  step 2:讓Action繼承ActionSupport
  public class LoginAction extends ActionSupport{
  ...
  }
 
  step 3:調用ActionSupport的方法getWebApplicationContext獲得WebApplicationContext 通過WebApplicatioContext獲得被spring容器管理的Service
 
  public class LoginAction extends ActionSupport{
        public ActionForward execute(ActionMapping mapping,
                                                        ActionForm form,
                                                        HttpServletRequest request,
                                                        HttpServletResponse response) throws Exception{
                      //取得Spring上下文
                      ApplicationContext context = getWebApplicationContext();
                      //取得被Spring管理的bean
                      StudentService ss = (StudentService)context.getBean("studentService");
                      ...
        }
  ...
  }

struts整合spring的方式二：
step 1:載入AppliationContext:
step 2:使用Action代理類(DelegatingActionProxy):DelegatingActionProxy的作用是依據path去spring容器中尋找被管理的Action
 public class LoginAction extends Action{
                    private StudentService ss;
                    //通用Ioc注入
                    public void setStudentService(StudentService ss){
                             this.ss=ss;
                    }
                    ...
 }
struts-config.xml
<action path="/listStudents" type="org.springframework.web.struts.DelegatingActionProxy" />
step 3:在spring設定檔中，配置Action
applicationContext.xml
<bean name="ss"  ...>
</bean>
<bean name="/listStudents" class="...">
     <property name="ss">
           <ref bean="ss" />
     </property>
</bean>

struts整合spring的方式三：
step 1:載入AppliationContext:
step 2:配置新的控制器DelegatingRequestProcessor
struts-config.xml
<action path="/listStudents" />

<controller processorClass="org.springframework.web.struts.DelegatingRequestProcessor" />

當收到一個/listStudents請求時,DelegatingRequestProcessor會自動從Spring應用上下文中尋找一個名為/listStudents的bean