How to Fix XmlBeanDefinitionStoreException in Java SpringBoot ApplicationConfig.xml

If you are using the SpringBoot framework with the Spring Config file, then the XML bean definition of the file should have the correct namespaces and schema locations. If they are not correct you will likely see an XmlBeanDefinitionStoreException as shown below.

Exception in thread "main" org.springframework.beans.factory.xml.XmlBeanDefinitionStoreException:
 Line 4 in XML document from class path resource [applicationConfig.xml] is invalid

	at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.doLoadBeanDefinitions(XmlBeanDefinitionReader.java:411)
	at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:347)
	at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:319)
	at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:184)
	at org.springframework.context.support.AbstractXmlApplicationContext.loadBeanDefinitions(AbstractXmlApplicationContext.java:130)
	at org.springframework.context.support.AbstractXmlApplicationContext.loadBeanDefinitions(AbstractXmlApplicationContext.java:95)
	at org.springframework.context.support.AbstractRefreshableApplicationContext.refreshBeanFactory(AbstractRefreshableApplicationContext.java:130)
	at org.springframework.context.support.AbstractApplicationContext.obtainFreshBeanFactory(AbstractApplicationContext.java:713)
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:595)
	at org.springframework.context.support.ClassPathXmlApplicationContext.(ClassPathXmlApplicationContext.java:144)
	at org.springframework.context.support.ClassPathXmlApplicationContext.(ClassPathXmlApplicationContext.java:85)
	at org.code2care.demo.DemoApplication.main(DemoApplication.java:14)

Caused by: org.xml.sax.SAXParseException; lineNumber: 4; columnNumber: 133; cvc-elt.1.a: 

Cannot find the declaration of element 'beans'.

As you can see in the above stack trace the beans declaration is not found.

To fix this issue, make sure that the template for the Spring Config file is the correct one as below.

<?xml version="1.0" encoding="UTF-8"?>
<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.xsd">

    <!-- Spring Config template -->

</beans>

Note: If you make use of IDE such as IntelliJ, you can get this template by navigating to New -> XML Configuration File -> Spring Config from the resources folder.

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