Tue, 28 Nov 2006 14:49:00 GMT

WebWork发展到现在已�l�到�?.X版本�Q�因为接触的晚，所以一开始就用上了WebWork2的版本，据说WebWork2.x+XWork1.x 的架构分��M��与Servlet API的紧偶合�Q��ɾpȝ��l�构更加清晰�Q�因为工作的关系�Q�我开始用上了WebWork2�Q�现在就用的�q�程做一个�ȝ��Q�再把WebWork2�q�上一遍，以便我更深入的学习WebWork2�?本文参考了夏昕�?lt;>�Q�以及CSDN上阿明的专栏�Q��ƈ非原创，只是自己写出来参考学习！)

在新的架构中WebWork2.x的作用是负责��用��L��HTTP��h��分离出来,使的��h��完全的脱��Servlet API,然后��这些请求用Map的方式传入XWork1.x,且XWork1.x通过Interceptor ��Map中的数据传到我们的VO�?然后由对应的自定义Action来调�?

首先打开DispatcherUtils.java,它在com.opensymphony.webwork.dispatcher包下面�?/p>

       扑ֈ�serviceAction�q�个�Ҏ��Q�它实例化了Map��h��Q�从��h��的服务中解析出对应的Action名称�?br />       HashMap extraContext = createContextMap(requestMap, params, session, application, request, response, context);
       OgnlValueStack stack = (OgnlValueStack) request.getAttribute(ServletActionContext.WEBWORK_VALUESTACK_KEY);
        if (stack != null) {
            extraContext.put(ActionContext.VALUE_STACK, new OgnlValueStack(stack));
        }
       try {
            String namespace = mapping.getNamespace();
            String name = mapping.getName();
            String method = mapping.getMethod();

            String id = request.getParameter("continue");
            if (id != null) {
                extraContext.put("__continue", id);
            }
       // if the ActionMapping says to go straight to a result, do it!
            if (mapping.getResult() != null) {
                Result result = mapping.getResult();
                result.execute(proxy.getInvocation());
            } else {
                proxy.execute();
            }

            // If there was a previous value stack then set it back onto the request
            if (stack != null) {
                request.setAttribute(ServletActionContext.WEBWORK_VALUESTACK_KEY, stack);
            }
        } catch 。。。。。。�?br />       扑ֈ�createContextMap�q�个�Ҏ��Q�它遍历了HttpServletRequest,HttpSession,ServletContext中的数据�Q�将他们复制到Map中从而内部结构与Servlet API相分��R�?br />         public HashMap createContextMap(Map requestMap,
                                    Map parameterMap,
                                    Map sessionMap,
                                    Map applicationMap,
                                    HttpServletRequest request,
                                    HttpServletResponse response,
                                    ServletContext servletContext) {
        HashMap extraContext = new HashMap();
//存放HTTP中上传文件的request session��h��
        extraContext.put(ActionContext.PARAMETERS, new HashMap(parameterMap));
        extraContext.put(ActionContext.SESSION, sessionMap);
        extraContext.put(ActionContext.APPLICATION, applicationMap);
        extraContext.put(ActionContext.LOCALE, (locale == null) ? request.getLocale() : locale);
        extraContext.put(ActionContext.DEV_MODE, Boolean.valueOf(devMode));

        extraContext.put(WebWorkStatics.HTTP_REQUEST, request);
        extraContext.put(WebWorkStatics.HTTP_RESPONSE, response);
        extraContext.put(WebWorkStatics.SERVLET_CONTEXT, servletContext);
        extraContext.put(ComponentInterceptor.COMPONENT_MANAGER, request.getAttribute(ComponentManager.COMPONENT_MANAGER_KEY));

        // �q�里用于存放HTTP中的request session��h��
        extraContext.put("request", requestMap);
        extraContext.put("session", sessionMap);
        extraContext.put("application", applicationMap);
        extraContext.put("parameters", parameterMap);

AttributeMap attrMap = new AttributeMap(extraContext);
extraContext.put("attr", attrMap);

        return extraContext;
    }
       创徏Action�Q�由ActionProxy来完成�?br />            ActionProxy proxy = ActionProxyFactory.getFactory().createActionProxy(namespace, name, extraContext);
            proxy.setMethod(method);
            request.setAttribute(ServletActionContext.WEBWORK_VALUESTACK_KEY, proxy.getInvocation().getStack());

哀伤血�?/a> 2006-11-28 22:49 发表评论

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