Example Filter that binds spring-managed beans into the request

SpringMappingFilter.java

import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;

import org.springframework.context.ApplicationContext;
import org.springframework.web.context.support.XmlWebApplicationContext;

public class SpringMappingFilter implements Filter {
  private ServletContext context;

  public void destroy() { }

  public void init(FilterConfig filterConfig) {
   this.context = filterConfig.getServletContext();
  }

  public void doFilter(ServletRequest request, ServletResponse response, FilterChain filter) 
      throws IOException, ServletException {
    // the Spring Context would have been configured by the SpringContextListener

    ApplicationContext springContext = this.context.getAttribute(XmlWebApplicationContext.DEFAULT_CONFIG_LOCATION);
    request.setAttribute("myBean", springContext.getBean("myBean");

    filterChain.doFilter(request, response);
  }
}