spring The request sent by the client was syntactically incorrect() issue

I am getting exception mentioned in subject line. Could you please explain what is wrong:

package mvc;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;

@Controller
@RequestMapping("/req")
public class Req {
@RequestMapping(method = RequestMethod.GET)
@ResponseBody
public String get(@RequestBody String body) {
    return body;
}
}    

SpringMVC-servlet.xml

   <?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://ift.tt/GArMu6"
       xmlns:xsi="http://ift.tt/ra1lAU"
       xmlns:util="http://ift.tt/OGfeTW"
       xmlns:context="http://ift.tt/GArMu7"
       xmlns:mvc="http://ift.tt/1bHqwjR"
       xsi:schemaLocation="http://ift.tt/GArMu6 http://ift.tt/1jdM0fG
    http://ift.tt/OGfeTW http://ift.tt/1feTls0
    http://ift.tt/GArMu7 http://ift.tt/1jdLYo7
    http://ift.tt/1bHqwjR http://ift.tt/JWpJWM">
    <!--It tells the Spring framework to look for annotations and then do appropriate dependency injections.-->
    <context:annotation-config/>
    <!--used to provide base package to scan components-->
    <context:component-scan base-package="mvc"/>

    <mvc:annotation-driven>
    <mvc:message-converters>
        <bean class="org.springframework.http.converter.StringHttpMessageConverter"/>
    </mvc:message-converters>
    </mvc:annotation-driven>


</beans>

When i tries to access http://localhost:8080/SpringMVC/req

    HTTP Status 400 -

type Status report

message

description The request sent by the client was syntactically incorrect ().
Apache Tomcat/7.0.16

Kindly help me in figure out the cause of this issue.

Thanks, Sandip