javax.servlet.ServletException: No adapter for handler

This exception bugged me quite a lot.

Here are some solutions, one of them might work for you.

1. If you have  <annotation-driven /> in you servlet and you are trying to implement any interfaces in your controller or trying to use any non-annotated controller. You need to add below code in your servlet.
<beans:bean id="simpleHandler" class="org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter"/>
(the handler adapters are different for annotated and non-annotated controllers.)

2. you might need to change <annotation-driven /> to <tx:annotation-driven proxy-target-class="false"/>

for this add below namespaces in your servlet

xmlns:tx="http://www.springframework.org/schema/tx"


 xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd
        http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd
           http://www.springframework.org/schema/tx
           http://www.springframework.org/schema/tx/spring-tx-2.5.xsd"


3. If  your controller is annotated controller and you are still getting this exception, you need to make sure that one of the methods in your controller must have

@RequestMapping(value = "/", method = RequestMethod.GET)

Hope this would be helpful to some folks.