Error creating bean with name 'opBean' defined in class path resource [applicationContext.xml] - spring

Question

Exception in thread "main" org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'opBean' defined in class path resource [applicationContext.xml]: Initialization of bean failed; nested exception is java.lang.NoClassDefFoundError: com/springlearn/operation (wrong name: com/springlearn/Operation)
Operation.java
package com.springlearn;
public class Operation {
public void msg() {System.out.println("MSG Invoked");}
public int m() {
System.out.println("M invoked");
return 2;
}
public int k() {
System.out.println("K invoked");
return 3;
}
}
TrackOperation.java
package com.springlearn;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
#Aspect
public class TrackOperation {
#Pointcut("execution(* operation .*(..))")
public void k() {
}
#Before("k()")
public void myadvice(JoinPoint jp) {
System.out.println("Additional Concern");
}
}
Test.java
package com.springlearn;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
public class Test
{
public static void main( String[] args )
{
ApplicationContext context= new ClassPathXmlApplicationContext("applicationContext.xml");
Operation e=(Operation)context.getBean("opBean");
System.out.println("Calling MSG");
e.msg();
System.out.println("Calling M");
e.m();
System.out.println("Calling K");
e.k();
}
}
applicationContext.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:aop="http://www.springframework.org/schema/aop"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop.xsd">
<bean id="opBean" class="com.springlearn.Operation"> </bean>
<bean id="trackMyBean" class="com.springlearn.TrackOperation"></bean>
<bean class="org.springframework.aop.aspectj.annotation.AnnotationAwareAspectJAutoProxyCreator"></bean>
</beans>
pom.xml
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>SpringLearn</groupId>
<artifactId>springlearn</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>springlearn</name>
<url>http://maven.apache.org</url>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<spring.version>3.0.5.RELEASE</spring.version>
</properties>
<dependencies>
<!-- Spring 3 dependencies -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aop</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjrt</artifactId>
<version>1.7.0</version>
</dependency>
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>1.7.0</version>
</dependency>
<dependency>
<groupId>cglib</groupId>
<artifactId>cglib</artifactId>
<version>3.2.9</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
</dependencies>
</project>

Answer 1

Make sure that in your aspect class the Target object class is spelt correctly under the pointcut expression
#Pointcut("execution(* Operation.*(..))")
//Operation class instead of operation case sensitivity