Spring webflow + Portal - 如何获取流定义中的 url 参数？

Question

我对门户网站和 spring webflow 有点陌生，并尝试将它们组合起来以便为各种用户任务设置流程。我的问题是，我需要生成第一个状态的直接 URL，并将子流的名称作为参数传递，以便从那里开始执行正确的子流 - 我不知道如何获取该参数。

这是我的上下文配置

<!-- Maps portlet modes to handlers -->
<bean id="portletModeHandlerMapping" class="org.springframework.web.portlet.handler.PortletModeHandlerMapping">
    <property name="portletModeMap">
        <map>
            <entry key="view">
                <bean class="com.mycompany.login.portlet.ViewFlowHandler" />
            </entry>
        </map>
    </property>
</bean>

<!-- Enables FlowHandlers -->
<bean class="org.springframework.webflow.mvc.portlet.FlowHandlerAdapter">
    <property name="flowExecutor" ref="flowExecutor"/>
</bean>

<!-- Executes flows: the central entry point into the Spring Web Flow system -->
<webflow:flow-executor id="flowExecutor">
</webflow:flow-executor>

<!-- The registry of executable flow definitions -->
<webflow:flow-registry id="flowRegistry" flow-builder-services="flowBuilderService">
    <webflow:flow-location path="classpath:flows/login-flow.xml" />
    <webflow:flow-location path="classpath:flows/main-flow.xml" />
    <webflow:flow-location path="classpath:flows/pwd-recovery-flow.xml" />
</webflow:flow-registry>

<webflow:flow-builder-services id="flowBuilderService" view-factory-creator="viewFactoryCreator"/>

<bean id="viewFactoryCreator" class="org.springframework.webflow.mvc.builder.MvcViewFactoryCreator">  
    <property name="viewResolvers">  
        <list>  
            <ref bean="viewResolver"/>  
        </list>  
    </property> 
</bean>  

<bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
    <property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/>
    <property name="prefix" value="/WEB-INF/flow-views/"/>
    <property name="suffix" value=".jsp"/>
</bean>


<!-- beans for business logic -->
<bean id="authService" 
      class="com.mycompany.login.portlet.service.AuthService" 
      scope="prototype" />

<!-- constants -->
<bean id="flowNames" class="com.mycompany.login.portlet.Flows" scope="singleton">
    <property name="loginMain"><value></value></property>
    <property name="passwordRecover"><value>pwd-recovery</value></property>
    <property name="finish"><value>finish</value></property>
    <property name="nflow"><value></value></property>
</bean>

我的流处理程序：

package com.mycompany.login.portlet;

import javax.servlet.http.HttpServletRequest;

import org.springframework.webflow.core.collection.LocalAttributeMap;
import org.springframework.webflow.core.collection.MutableAttributeMap;
import org.springframework.webflow.mvc.portlet.AbstractFlowHandler;


public class ViewFlowHandler extends AbstractFlowHandler{
    public String getFlowId() {
        return "main-flow";
    }

}

入口点是主流，它基于名为“flo”的 url 中的 get 参数将重定向到子流。目前，当我尝试直接访问它时，我的 requestParameter 映射是空白的。我不知道在这种情况下网址是什么。当前 URL 的示例是“http://localhost:8080/portal/portal/default/Login/Mycompany+LoginWindow?flo=pwd-recovery”。另外，稍后我想在 URL 中传递其他参数，例如 userid 等，但我现在得到 requestParameters 的空白映射。这是我的入口点流定义

main-flow.xml

http://www.springframework.org/schema/webflow/spring-webflow-2.0.xsd">

<action-state id="branch">
    <on-entry>
        <!-- <evaluate expression="flowNames.setNflow(requestParameters.flo)"/> -->
        <evaluate expression="flowNames.checking(requestParameters)"/>
    </on-entry>

    <evaluate expression="flowNames.enableTransition()" />
    <transition on="yes" to="proceed" />

</action-state>


<action-state id="proceed">

    <!--<if test="flowNames.nflow==''" then="login"/>
    <if test="flowNames.nflow=='pwd-recovery'" then="pwd-recovery"/>
    <if test="flowNames.nflow=='finish'" then="finish-main"/>-->

    <on-entry>
        <!-- <evaluate expression="flowNames.setNflow(requestParameters.flo)"/> -->
        <evaluate expression="flowNames.checking(requestParameters)"/>
    </on-entry>

    <evaluate expression="flowNames.nflow"/>
    <transition on="pwd-recovery" to="pwd-recovery"/>
    <transition on="finish" to="finish-main"/>
    <transition to="login"/>

</action-state>

<subflow-state id="login" subflow="login-flow">
    <transition on="finish-login" to="proceed"/>
</subflow-state>

<subflow-state id="pwd-recovery" subflow="pwd-recovery-flow">
    <transition on="finish-pwd" to="proceed"/>
</subflow-state>

<end-state id="finish-main"/>

Answer 1

我认为您的问题与 Spring Webflow 无关，而与 portlet 有关。查看：

http://wpcertification。 blogspot.com/2010/05/getting-query-string-of-portal-url-from.html

其中显示了从 portlet 获取请求参数的一种方法。然而我不知道如何从 Spring webflow 中做到这一点 - 尽管我正在努力找出答案！