菜鸟学Struts2——Interceptors

 1 package yaolin.core.interceptor;
 2 import com.opensymphony.xwork2.ActionInvocation;
 3 import com.opensymphony.xwork2.interceptor.AbstractInterceptor;
 4 import yaolin.core.action.OutAction;
 5 
 6 public class ValueInterceptor extends AbstractInterceptor {
 7     private static final long serialVersiOnUID= -8801972415271737380L;
 8 
 9     //resultCode = interceptor.getInterceptor().intercept(DefaultActionInvocation.this);
10     @Override
11     public String intercept(ActionInvocation invocation) throws Exception {
12         OutAction action = null;
13         if (invocation.getAction() instanceof OutAction) {
14             action = (OutAction) invocation.getAction();
15             action.setBefore("before");
16         }
17         invocation.invoke();
18             // invoke all interceptor
19             // resultCode = invokeActionOnly();
20             // executeResult(); 这里已经执行了executeResult(),所以下面的return不会对result产生影响。
21         // continue valueInterceptor
22         if (action != null) {
23             // 上面已经执行了invokeActionOnly()，所以这里的设值不会影响值栈
24             action.setAfter("after");
25         }
26         return invocation.getResultCode();
27     }
28 
29 }

 1 DOCTYPE struts PUBLIC
 2     "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
 3     "http://struts.apache.org/dtds/struts-2.3.dtd">
 4 <struts>
 5     <constant name="struts.enable.DynamicMethodInvocation" value="true" />
 6     <package name="v">
 7         <interceptors>
 8             <interceptor name="valueInterceptor" class="yaolin.core.interceptor.ValueInterceptor">interceptor>
 9         interceptors>
10     package>
11 struts>

 1 package yaolin.core.action;
 2 
 3 import org.apache.struts2.convention.annotation.InterceptorRef;
 4 import org.apache.struts2.convention.annotation.ParentPackage;
 5 
 6 /**
 7  * /out.action
 8  * @author yaolin
 9  */
10 @ParentPackage("v")
11 @InterceptorRef("valueInterceptor")
12 public class OutAction {
13 
14     private String before;
15     private String after;
16     
17     public String execute() {
18         return "success";
19     }
20     
21     public String getBefore() {
22         return before;
23     }
24     public void setBefore(String before) {
25         this.before = before;
26     }
27     public String getAfter() {
28         return after;
29     }
30     public void setAfter(String after) {
31         this.after = after;
32     }
33 }

 1 <package name="default" extends="struts-default">
 2    <interceptors>
 3         <interceptor name="timer" class=".."/>
 4         <interceptor name="logger" class=".."/>
 5         <interceptor-stack name="myStack">
 6            <interceptor-ref name="timer"/>
 7            <interceptor-ref name="logger"/>
 8         interceptor-stack>
 9     interceptors>
10  
11 <action name="login"
12      class="tutuorial.Login">
13          <interceptor-ref name="myStack"/>
14          <result name="input">login.jspresult>
15          <result name="success"
16              type="redirectAction">/secure/homeresult>
17 action>
18 package>