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Getting exception while initializing beans in spring

Posted on 2016-07-23
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Last Modified: 2016-08-09
HI,
I am getting the following error on running my spring applicatoin :
Exception in thread "main" org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'hello' defined in file [/Users/robinsuri/Documents/Mumbai Session/MVC-DI-Tutorial/2-SimpleObjectCreation/src/main/config.xml]: Initialization of bean failed; nested exception is org.springframework.beans.TypeMismatchException: Failed to convert property value of type [java.lang.String] to required type [com.mkyong.common.Test] for property 'test'; nested exception is java.lang.IllegalArgumentException: Cannot convert value of type [java.lang.String] to required type [com.mkyong.common.Test] for property 'test': no matching editors or conversion strategy found
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:480)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory$1.run(AbstractAutowireCapableBeanFactory.java:409)
	at java.security.AccessController.doPrivileged(Native Method)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:380)
	at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:264)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:261)
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:185)
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:164)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:429)
	at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:728)
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:380)
	at org.springframework.context.support.FileSystemXmlApplicationContext.<init>(FileSystemXmlApplicationContext.java:140)
	at org.springframework.context.support.FileSystemXmlApplicationContext.<init>(FileSystemXmlApplicationContext.java:84)
	at com.mkyong.common.App.main(App.java:21)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:497)
	at com.intellij.rt.execution.application.AppMain.main(AppMain.java:144)
Caused by: org.springframework.beans.TypeMismatchException: Failed to convert property value of type [java.lang.String] to required type [com.mkyong.common.Test] for property 'test'; nested exception is java.lang.IllegalArgumentException: Cannot convert value of type [java.lang.String] to required type [com.mkyong.common.Test] for property 'test': no matching editors or conversion strategy found
	at org.springframework.beans.BeanWrapperImpl.convertForProperty(BeanWrapperImpl.java:391)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.convertForProperty(AbstractAutowireCapableBeanFactory.java:1289)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:1250)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1010)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:472)
	... 19 more
Caused by: java.lang.IllegalArgumentException: Cannot convert value of type [java.lang.String] to required type [com.mkyong.common.Test] for property 'test': no matching editors or conversion strategy found
	at org.springframework.beans.TypeConverterDelegate.convertIfNecessary(TypeConverterDelegate.java:231)
	at org.springframework.beans.TypeConverterDelegate.convertIfNecessary(TypeConverterDelegate.java:138)
	at org.springframework.beans.BeanWrapperImpl.convertForProperty(BeanWrapperImpl.java:386)
	... 23 more

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My code is just this :
        ApplicationContext context = new FileSystemXmlApplicationContext("2-SimpleObjectCreation/src/main/config.xml");

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and xml file is :
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
	http://www.springframework.org/schema/beans/spring-beans-2.5.xsd">

    <bean id="hello" class="com.mkyong.common.HelloWorld">
        <property name="name" value="stringbean"/>
        <property name="test"><idref bean="testbean"/></property>
    </bean>

    <bean id="testbean" class="com.mkyong.common.Test">
        <property name="name" value="teststring"/>
    </bean>
</beans>

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Although if i change above idref to ref things work fine. Its just i wanted to undertand the usage of idref that i tried this. but it didnt work.
I have seend using something like this on http://docs.spring.io/spring/docs/current/spring-framework-reference/html/beans.html
Under the The idref element section there are two examples both do not work.
The other thing i tried is         <property name="test" value="testbean"</property>
This also fails...

Please help me in understanding this idref and other example

Thanks
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Question by:Rohit Bajaj
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Amitkumar Panchal earned 500 total points
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