getting error in project......Here is my code - spring-webflow

Question

It is not identifying the initFlow() method in FlowController
Here is my FlowController
FlowController.java :-
-----------------------------------
package com.niit.shoppingcart;
import java.util.List;
import javax.servlet.http.HttpSession;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.stereotype.Component;
import com.niit.shoppingcart.dao.BillingAddressDAO;
import com.niit.shoppingcart.dao.CardDetailDAO;
import com.niit.shoppingcart.dao.CartDAO;
import com.niit.shoppingcart.dao.OrderDetailDAO;
import com.niit.shoppingcart.dao.OrderedItemsDAO;
import com.niit.shoppingcart.dao.ProductDAO;
import com.niit.shoppingcart.dao.ShippingAddressDAO;
import com.niit.shoppingcart.dao.UserDetailsDAO;
import com.niit.shoppingcart.model.BillingAddress;
import com.niit.shoppingcart.model.CardDetail;
import com.niit.shoppingcart.model.Cart;
import com.niit.shoppingcart.model.CheckoutDetails;
import com.niit.shoppingcart.model.OrderDetail;
import com.niit.shoppingcart.model.OrderedItems;
import com.niit.shoppingcart.model.Product;
import com.niit.shoppingcart.model.ShippingAddress;
import com.niit.shoppingcart.model.UserDetails;
#Component(value="flowController")
public class FlowController {
#Autowired
private ProductDAO productDAO;
#Autowired
private ShippingAddress shippingAddress;
#Autowired
private BillingAddress billingAddress;
#Autowired
private OrderDetail orderDetail;
#Autowired
private OrderedItems orderedItems;
#Autowired
private CardDetail cardDetail;
#Autowired
private ShippingAddressDAO shippingAddressDAO;
#Autowired
private BillingAddressDAO billingAddressDAO;
#Autowired
private OrderedItemsDAO orderedItemsDAO;
#Autowired
private OrderDetailDAO orderDetailDAO;
#Autowired
private CardDetailDAO cardDetailDAO;
#Autowired
UserDetails userDetails;
#Autowired
UserDetailsDAO userDetailsDAO ;
#Autowired
CartDAO cartDAO;
#Autowired
List<Cart> cart;
#Autowired
HttpSession httpSession;
#Autowired
Product product;
public ShippingAddress initFlow() {
return new ShippingAddress();
}
public String saveDetails(ShippingAddress shippingAddress){
/*Authentication auth = SecurityContextHolder.getContext().getAuthentication();
String name = auth.getName();
UserDetails userDetails=userDetailsDAO.getCustomerByUserName(name);
String loggedInUser = userDetails.getId();
shippingAddress.setUserId(loggedInUser);*/
shippingAddressDAO.saveOrUpdate(shippingAddress);
return "success";
}
public String saveDetails(BillingAddress billingAddress){
/*Authentication auth = SecurityContextHolder.getContext().getAuthentication();
String name = auth.getName();
UserDetails userDetails=userDetailsDAO.getCustomerByUserName(name);
String loggedInUser = userDetails.getId();
billingAddress.setUserId(loggedInUser);*/
billingAddressDAO.saveOrUpdate(billingAddress);
return "success";
}
public String saveDetails(CardDetail cardDetail){
/*Authentication auth = SecurityContextHolder.getContext().getAuthentication();
String name = auth.getName();
UserDetails userDetails=userDetailsDAO.getCustomerByUserName(name);
String loggedInUser = userDetails.getId();
cardDetail.setUserId(loggedInUser);*/
cardDetailDAO.saveOrUpdate(cardDetail);
return "success";
}
/*public String remove(){
Authentication auth = SecurityContextHolder.getContext().getAuthentication();
String name = auth.getName();
UserDetails userDetails=userDetailsDAO.getCustomerByUserName(name);
String loggedInUser = userDetails.getId();
List<Cart> cartList = cartDAO.getByUser(loggedInUser);
if (cartList != null) {
for (int i = 0; i < cartList.size(); i++) {
cartList.get(i).setQuantity(0);
cartDAO.update(cartList.get(i));
}
}
return "success";
}*/
}
===============================================================================
Here is my checkout-flow.xml
checkout-flow.xml :-
----------------------------
<?xml version="1.0" encoding="UTF-8"?>
<flow xmlns="http://www.springframework.org/schema/webflow"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/webflow http://www.springframework.org/schema/webflow/spring-webflow-2.4.xsd">
<var name="shippingAddress" class="com.niit.shoppingcart.model.ShippingAddress" />
<var name="billingAddress" class="com.niit.shoppingcart.model.BillingAddress" />
<var name="orderedItems" class="com.niit.shoppingcart.model.OrderedItems" />
<var name="orderDetail" class="com.niit.shoppingcart.model.OrderDetail" />
<var name="CardDetail" class="com.niit.shoppingcart.model.CardDetail" />
<var name="cart" class="com.niit.shoppingcart.model.Cart" />
<var name="UserDetails" class="com.niit.shoppingcart.model.UserDetails" />
<var name="checkoutDetails" class="com.niit.shoppingcart.model.CheckoutDetails"></var>
<on-start>
<evaluate expression="flowController.initFlow()" result="flowScope.shippingAddress" />
</on-start>
<view-state id="start" view="shippingAddress" model="flowScope.shippingAddress">
<transition on="submitShippingAddress" to="saveShipping" />
<transition on="back" to="toHome" />
</view-state>
<action-state id="saveShipping">
<evaluate expression="flowController.saveDetails(shippingAddress)"></evaluate>
<transition on="success" to="viewBillingDetails" />
</action-state>
<!-- <action-state id="shippingDetails">
<evaluate
expression="flowController.addShippingAddress(flowScope.checkoutDetails,flowScope.shippingAddress)"></evaluate>
<transition on="success" to="viewBillingDetails" />
<transition on="failure" to="start" />
</action-state> -->
<view-state id="viewBillingDetails" view="billingAddress" model="flowScope.billingAddress">
<transition on="submitBillingAddress" to="saveBilling" />
<transition on="cancel" to="start" />
</view-state>
<action-state id="saveBilling">
<evaluate expression="flowController.saveDetails(billingAddress)"></evaluate>
<transition on="success" to="viewCardDetail" />
</action-state>
<!-- <action-state id="billingDetails">
<evaluate
expression="flowController.addBillingAddress(flowScope.checkoutDetails,billingAddress)"></evaluate>
<transition on="success" to="viewCardDetail" />``
</action-state> -->
<view-state id="viewCardDetail" view="cardDetail"
model="cardDetail">
<transition on="confirmCheckout" to="save" />
<transition on="cancel" to="viewBillingDetails" />
</view-state>
<!-- <action-state id="cardDetail">
<evaluate
expression="flowController.addCardDetails(flowScope.checkoutDetails,cardDetail)"></evaluate>
<transition on="success" to="orderConfirm" />
</action-state> -->
<action-state id="save">
<evaluate expression="flowController.saveDetails(cardDetail)"></evaluate>
<transition on="success" to="orderConfirm" />
</action-state>
<view-state id="orderConfirm" view="orderConfirmed">
<!-- <transition on="finalHome" to="remove" /> -->
<transition on="finalHome" to="toHome" />
</view-state>
<!-- <action-state id="remove">
<evaluate expression="FlowController.remove()"></evaluate>
<transition on="success" to="toHome" />
</action-state> -->
<!-- <end-state id="orderConfirmed" view="orderConfirmed"/>
<end-state id="toCartView" view="externalRedirect:contextRelative:/user/cart/" /> -->
<end-state id="toHome" view="Home" />
<global-transitions>
<transition on="back" to="Home" />
</global-transitions>
</flow>
Here is my dispatcher-servlet.xml, i have given the entries of checkoutDetails....
dispatcher-servlet.xml:-
------------------------------------------------------
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:flow="http://www.springframework.org/schema/webflow-config"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-4.0.xsd
http://www.springframework.org/schema/webflow-config
http://www.springframework.org/schema/webflow-config/spring-webflow-config-2.4.xsd">
<context:component-scan base-package="com.niit.shoppingcart" />
<bean id="multipartResolver"
class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
<property name="maxUploadSize" value="200000" />
</bean>
<bean
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix">
<value>/view/</value>
</property>
<property name="suffix">
<value>.jsp</value>
</property>
</bean>
<mvc:resources mapping="/resources/**" location="/resources/" />
<mvc:annotation-driven/>
<!-- Using FlowController instead of FlowHandlers; see SWF Reference Guide, section 9.5. -->
<context:component-scan base-package="com.niit.shoppingcart.*" />
<bean id="flowController" class="org.springframework.webflow.mvc.servlet.FlowController">
<property name="flowExecutor" ref="flowExecutor"/>
</bean>
<flow:flow-executor id="flowExecutor" flow-registry="flowRegistry"/>
<!-- This creates an XmlFlowRegistryFactory bean -->
<flow:flow-registry id="flowRegistry" flow-builder-services="flowBuilderServices" base-path="/WEB-INF">
<flow:flow-location id="memberShip" path="/memberShipFlow.xml"/>
<flow:flow-location id="checkoutDetails" path="/checkout-flow.xml"/>
</flow:flow-registry>
<flow:flow-builder-services id="flowBuilderServices" 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.UrlBasedViewResolver">
<property name="viewClass"
value="org.springframework.web.servlet.view.JstlView" />
<property name="prefix">
<value>/view/</value>
</property>
<property name="suffix">
<value>.jsp</value>
</property>
</bean>
<bean class="org.springframework.webflow.mvc.servlet.FlowHandlerAdapter">
<property name="flowExecutor" ref="flowExecutor" />
</bean>
<bean class="org.springframework.webflow.mvc.servlet.FlowHandlerMapping">
<property name="flowRegistry" ref="flowRegistry" />
<property name="order" value="0" />
</bean>
</beans>
===============================================================================
Here is my error report:-
Error Report :-
--------------------------------------------------
SEVERE: Servlet.service() for servlet [dispatcher] in context with path [/ShoppingCartFrontEnd] threw exception [Request processing failed; nested exception is org.springframework.webflow.execution.ActionExecutionException: Exception thrown executing [AnnotatedAction#2e7a1b64 targetAction = [EvaluateAction#3bb088b8 expression = flowController.initFlow(), resultExpression = flowScope.shippingAddress], attributes = map[[empty]]] in state 'null' of flow 'checkoutDetails' -- action execution attributes were 'map[[empty]]'] with root cause
org.springframework.expression.spel.SpelEvaluationException: EL1004E:(pos 15): Method call: Method initFlow() cannot be found on org.springframework.webflow.mvc.servlet.FlowController type
at org.springframework.expression.spel.ast.MethodReference.findAccessorForMethod(MethodReference.java:211)
at org.springframework.expression.spel.ast.MethodReference.getValueInternal(MethodReference.java:125)
at org.springframework.expression.spel.ast.MethodReference.access$000(MethodReference.java:49)
at org.springframework.expression.spel.ast.MethodReference$MethodValueRef.getValue(MethodReference.java:347)
at org.springframework.expression.spel.ast.CompoundExpression.getValueInternal(CompoundExpression.java:88)
at org.springframework.expression.spel.ast.SpelNodeImpl.getTypedValue(SpelNodeImpl.java:131)
at org.springframework.expression.spel.standard.SpelExpression.getValue(SpelExpression.java:299)
at org.springframework.binding.expression.spel.SpringELExpression.getValue(SpringELExpression.java:84)
at org.springframework.webflow.action.EvaluateAction.doExecute(EvaluateAction.java:75)
at org.springframework.webflow.action.AbstractAction.execute(AbstractAction.java:188)
at org.springframework.webflow.execution.AnnotatedAction.execute(AnnotatedAction.java:145)
at org.springframework.webflow.execution.ActionExecutor.execute(ActionExecutor.java:51)
at org.springframework.webflow.engine.ActionList.execute(ActionList.java:154)
at org.springframework.webflow.engine.Flow.start(Flow.java:526)
at org.springframework.webflow.engine.impl.FlowExecutionImpl.start(FlowExecutionImpl.java:368)
at org.springframework.webflow.engine.impl.FlowExecutionImpl.start(FlowExecutionImpl.java:223)
at org.springframework.webflow.executor.FlowExecutorImpl.launchExecution(FlowExecutorImpl.java:140)
at org.springframework.webflow.mvc.servlet.FlowHandlerAdapter.handle(FlowHandlerAdapter.java:263)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:963)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:897)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970)
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:861)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:622)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:230)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:108)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:522)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:620)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:349)
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:1110)
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:785)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1425)
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Unknown Source)

Answer 1

The problem may be in your dispatcher-servlet.xml:
<bean id="flowController" class="org.springframework.webflow.mvc.servlet.FlowController">
<property name="flowExecutor" ref="flowExecutor"/>
</bean>
Your FlowController.java file has:
package com.niit.shoppingcart;
At the head, so that would mean that the full name of your bean should be:
<bean id="flowController" class="com.niit.shoppingcart.FlowController">
<property name="flowExecutor" ref="flowExecutor"/>
</bean>
Does that help you?

Answer 2

You have 2 beans named flowController. One of them is a spring bean for your configuration, the other is the bean you use in this order flow.
I suggest you change:
#Component(value="flowController")
to something like:
#Component(value="checkoutFlowController")
and then all references to it in your checkout-flow as well:
<evaluate expression="checkoutFlowController.initFlow()" result="flowScope.shippingAddress" />
etc.