1 <bean id= "saveUserAction"   class = "com.test.action.user.SaveUserAction"  scope= "prototype" >
2     <property name="service"  ref= "userService" ></property>
3 </bean>  

1 Java代码  收藏代码
2
3     /**
4      * The set of Action instances that have been created and
5      * initialized, keyed by the fully qualified Java class name of the
6      * Action class.
7      */
8     protected HashMap actions = new HashMap();      

 1 Java代码  收藏代码
 2
 3     protected Action processActionCreate(HttpServletRequest request,
 4                                              HttpServletResponse response,
 5                                              ActionMapping mapping)
 6             throws IOException {
 7
 8             // Acquire the Action instance we will be using (if there is one)
 9             String className = mapping.getType();//１、先获取类名
10             ...
11             Action instance = null;
12             synchronized (actions) {
13
14                 // Return any existing Action instance of this class
15                 instance = (Action) actions.get(className);//２、根据类名去map里查寻实例是否已经存在
16                 if (instance != null) {
17                     return (instance); //３、如果存在，则直接返回
18                 }
19
20                 // Create and return a new Action instance
21                 //４、如果不存在，则创建一个新实例
22                 instance = (Action) RequestUtils.applicationInstance(className)
23
24                 instance.setServlet(this.servlet);
25                 actions.put(className, instance);//５、把创建好的action放到map里
26             }
27             ...
28             return (instance);
29
30         }