Cannot create inner bean 'org.szymon.email.classes.MyMapperClass

Question

I have exception type: org.springframework.beans.factory.BeanCreationException full stack:

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.web.servlet.view.ContentNegotiatingViewResolver#0' defined in ServletContext resource [/WEB-INF/dispatcher-servlet.xml]: Cannot create inner bean 'org.szymon.email.classes.MyMapperClass#1e222db' of type [org.szymon.email.classes.MyMapperClass] while setting bean property 'defaultViews' with key [1]; nested exception is org.springframework.beans.factory.CannotLoadBeanClassException: Cannot find class [org.szymon.email.classes.MyMapperClass] for bean with name 'org.szymon.email.classes.MyMapperClass#1e222db' defined in ServletContext resource [/WEB-INF/dispatcher-servlet.xml]; nested exception is java.lang.ClassNotFoundException: org.szymon.email.classes.MyMapperClass
    at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveInnerBean(BeanDefinitionValueResolver.java:282)
    at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveValueIfNecessary(BeanDefinitionValueResolver.java:121)
    at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveManagedList(BeanDefinitionValueResolver.java:353)
    at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveValueIfNecessary(BeanDefinitionValueResolver.java:154)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:1417)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1158)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:519)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:458)
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:296)

my dispatcher-servlet.xml:

<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"
xmlns:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.2.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.2.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd">


<context:component-scan base-package="org.szymon.email.*" />

<tx:annotation-driven />

<mvc:annotation-driven />                                       

<bean class="org.springframework.web.servlet.view.ContentNegotiatingViewResolver">
    <property name="favorPathExtension" value="true"/>
    <property name="mediaTypes">
        <map>
            <entry key="json" value="application/json"/>
            <entry key="jsonp" value="application/javascript"/>
        </map>
    </property>
    <property name="defaultViews">
        <list>
            <bean class="org.springframework.web.servlet.view.json.MappingJacksonJsonView"/>
            <bean class="org.szymon.email.classes.MyMapperClass"/>
        </list>
    </property>
</bean>

</beans>

and my MyMapperClass:

package org.szymon.email.classes;

import java.util.Map;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.web.servlet.view.json.MappingJacksonJsonView;

public class MyMapperClass extends MappingJacksonJsonView {

    /**
     * Default content type. Overridable as bean property.
     */
    public static final String DEFAULT_CONTENT_TYPE = "application/javascript";

    @Override
    public String getContentType() {
        return DEFAULT_CONTENT_TYPE;
    }

    /**
     * Prepares the view given the specified model, merging it with static
     * attributes and a RequestContext attribute, if necessary.
     * Delegates to renderMergedOutputModel for the actual rendering.
     * @see #renderMergedOutputModel
     */
    @Override
    public void render(Map<String, ?> model, HttpServletRequest request, HttpServletResponse response) throws Exception {

        if("GET".equals(request.getMethod().toUpperCase())) {
            @SuppressWarnings("unchecked")
            Map<String, String[]> params = request.getParameterMap();

            if(params.containsKey("callback")) {
                response.getOutputStream().write(new String(params.get("callback")[0] + "(").getBytes());
                super.render(model, request, response);
                response.getOutputStream().write(new String(");").getBytes());
                response.setContentType("application/javascript");
            }

            else {
                super.render(model, request, response);
            }
        }

        else {
            super.render(model, request, response);
        }
    }
}

This is continuation of solving problem from question: Spring RESTful ajax gets error

There is one more interesting thing. When I put comment on this bean like this:

<!-- <bean class="org.szymon.email.classes.MyMapperClass"/> -->

And create instance of this class in method on my controller and invoke render method of it, then everything is fine... but it is not proper solution.

Please help. Cheers

Answer 1

The problem seems to be a build - IDE related. I was able to run the project both from IntellIJ IDEA and also by executing then Maven build and placing the produced war in webapps directory of Tomcat.

I suggest you do a Maven clean-compile-package and try again