A simple problem, but I can not slove:Why this setter() getter() error?

Question

when I run tomcat , the tomcat page show this error:
Error creating bean with name 'springappController' defined in ServletContext resource [WEB-INF/springapp-servlet.xml]: Error setting property values; nested exception is org.springframework.beans.NotWritablePropertyException: Invalid property 'productManager' of bean class [SpringappController]: Bean property 'productManager' is not writable or has an invalid setter method. Does the parameter type of the setter match the return type of the getter?     org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:1058)...................................
It says that there is wrong property defined inside springapp-servlet. xml due to my setter() and getter() has problem,
the springapp-servlet. xml file where I defined this controller bean is like follows, the error warning place is highlighted :
<bean id="springappController" class="SpringappController">
<!-- add this part after we create ProductManager and modify the controller and hello.jsp-->
<property name="productManager">      <ref bean="prodMan"/>
</property>
</bean>
<bean id="prodMan" class="bus.ProductManager">
     <property name="products">
          <list>
               <ref bean="product1"/>
               <ref bean="product2"/>
               <ref bean="product3"/>
          </list>
          </property>     
</bean>
the place I define my setter() and getter() is appspringController class, which is:
package web;
import org.springframework.web.servlet.mvc.Controller;
import org.springframework.web.servlet.ModelAndView;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import java.io.IOException;
import java.util.*;
import java.util.Map;
import java.util.HashMap;
import bus.Product;
import bus.ProductManager;
public class SpringappController implements Controller {
//logger for this class and subclass
protected Log logger=LogFactory.getLog(getClass());
private ProductManager productManager;
public ModelAndView handleRequest(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {   
String now=(new java.util.Date()).toString();
logger.info("returning hello view with"+now);
Map myModel=new HashMap();
myModel.put("now",now);
myModel.put("Products", productManager.getProducts());
return new ModelAndView("hello","model",myModel);
}//end of HandleRequest
public void setProductManager(ProductManager pm){
     productManager=pm;
public ProductManager getProductManager(){
     return productManager;
}//end of controller
I do not see any error of my setter() and getter() method in the SpringappController, and I do not know where is wrong inside the springapp-servlet. xml file. could any one help me?
Message was edited by:
Mellon
Message was edited by:
Mellon
Message was edited by:
Mellon
Message was edited by:
Mellon

Answer 1

hi vibhaa
Can you please explicitly put what you meant by lost a class,I think he miss typed the path of the class. e.g.
if the class name is Product.java in the package com -> src -> packs ->
he must have typed as
com.src.Product in stead of
com.src.packs.Product
I am having a similar problem and would like to know the solution. Just check you path as I mentioned earlier, if the path is alright, then make sure you have declared your class as "public".
let me what is happening with it.