<properties>
<jdk.version>1.8</jdk.version>
<spring.framework.version>5.1.6.RELEASE</spring.framework.version>
<spring.security.version>3.2.9.RELEASE</spring.security.version>
<spring.integration.version>5.1.4.RELEASE</spring.integration.version>
</properties>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${spring.security.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context-support</artifactId>
<version>${spring.security.version}</version>
</dependency>
<dependency>
<groupId>net.sf.ehcache</groupId>
<artifactId>ehcache</artifactId>
<version>2.10.6</version>
</dependency>

<cache name="myList" 
overflowToDisk="false"  statistics="true"
eternal="false"
maxElementsInMemory="10000"
timeToIdleSeconds="0"
timeToLiveSeconds="300"
memoryStoreEvictionPolicy="LFU" />

     public class MyClass
{
public final Map<String, String> getDepartmentsList(String userid) {
System.out.println("I am getting the dept");
Map<String, String> deptMap = myService.getAuthorizedDept(userid);
return deptMap;
}
}
@Service 
import org.springframework.cache.annotation.Cacheable;
public class Myservice
{
@Cacheable(value = "myList", keyGenerator = "cacheKeyGenerator" )
public Map<String, String> getDepartmentsList(String userid){
}
}

<?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:cache="http://www.springframework.org/schema/cache"
xsi:schemaLocation="http://www.springframework.org/schema/beans 
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/cache 
http://www.springframework.org/schema/cache/spring-cache.xsd">
<cache:annotation-driven />
<bean id="cacheManager"
class="org.springframework.cache.ehcache.EhCacheManagerFactoryBean">
<property name="shared" value="true" />
</bean>
<bean id="cacheKeyGenerator"
class="test.util.StringArgumentCacheKeyGenerator" />
</beans>

Caused by: java.lang.IllegalStateException:Cannot convert value of type 'net.sf.ehcache.CacheManager' to required type 'org.springframework.cache.CacheManager' for property 'cacheManager':
no matching editors or conversion strategy found
org.springframework.beans.factory.BeanCreationException:
Error creating bean with name 'org.springframework.cache.interceptor.CacheInterceptor#0':
Initialization of bean failed; nested exception is org.springframework.beans.ConversionNotSupportedException:
Failed to convert property value of type 'net.sf.ehcache.CacheManager' to required type 'org.springframework.cache.CacheManager' for property 'cacheManager';nested exception is java.lang.IllegalStateException: Cannot convert value of type 

<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:context="http://www.springframework.org/schema/context"
xmlns:cache="http://www.springframework.org/schema/cache" xmlns:p="http://www.springframework.org/schema/p"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/tx 
http://www.springframework.org/schema/tx/spring-tx.xsd
http://www.springframework.org/schema/mvc 
http://www.springframework.org/schema/mvc/spring-mvc.xsd
http://www.springframework.org/schema/context 
http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/cache
http://www.springframework.org/schema/cache/spring-cache.xsd">
<cache:annotation-driven />
<bean id="cacheManager" class="org.springframework.cache.ehcache.EhCacheCacheManager">
<property name="cacheManager">
<ref local="ehcache" />
</property>
</bean>
<bean id="ehcache"
class="org.springframework.cache.ehcache.EhCacheManagerFactoryBean"
p:configLocation="classpath:ehcache.xml" />