<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
              xmlns="http://java.sun.com/xml/ns/javaee"
              xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
                                  http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
              id="WebApp_ID"
              version="3.0">

  <display-name>RequestScopeExample</display-name>
  <welcome-file-list>
    <welcome-file>index.html</welcome-file>
    <welcome-file>index.htm</welcome-file>
  </welcome-file-list>
 
  <!-- Dispatcher servlet for running beans-servlet.xml and request under bs/* pattern url's -->
  <servlet>
    <servlet-name>beans</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
  </servlet>
  <servlet-mapping>
    <servlet-name>beans</servlet-name>
    <url-pattern>/conn/*</url-pattern>
  </servlet-mapping>
</web-app>

package com.knowledgewalls;

public class RndHolder {
    private int rndNumber;
    
    public int getRndNumber(){
        return rndNumber;
    }
    public void setRndNumber(int rndNumber){
        this.rndNumber = rndNumber;
    }
    
    public void generateRndNumber(){
        this.rndNumber = (int) (Math.random() * 99999);
    }
}

<?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"
    xmlns:context="http://www.springframework.org/schema/context"
    xsi:schemaLocation="http://www.springframework.org/schema/beans 
                        http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
                        http://www.springframework.org/schema/aop
                        http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
                        http://www.springframework.org/schema/context
                        http://www.springframework.org/schema/context/spring-context-3.0.xsd">

    <bean id="rndHolder" class="com.knowledgewalls.RndHolder" scope="request">
        <aop:scoped-proxy/>
    </bean>
    <context:component-scan base-package="com.knowledgewalls"></context:component-scan>

</beans>

package com.knowledgewalls;


import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

@Controller("/ShowAccountDetails")
public class ShowAccountDetails extends HttpServlet {

    @Autowired
    RndHolder rndHolder;
    
    @RequestMapping
    public @ResponseBody void getMethod(HttpServletRequest request,HttpServletResponse response) throws Exception{
        response.getWriter().write("Old No. "+rndHolder.getRndNumber()+"\n");
        rndHolder.generateRndNumber();
        response.getWriter().write("New No. "+rndHolder.getRndNumber()+"\n");
        response.getWriter().write("Hash code Ref. "+rndHolder);
    }
}