Spring整合Servlet练习

package com.chinasoft.servlet; import java.io.IOException; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import org.springframework.web.context.WebApplicationContext; import org.springframework.web.context.support.WebApplicationContextUtils; public class HttpServletProxy extends HttpServlet { private static final long serialVersionUID = -7208519469035631940L; Log logger = LogFactory.getLog(HttpServletProxy.class); private String targetServlet; private HttpServlet proxy; public void init() throws ServletException { this.targetServlet = getInitParameter("targetServlet"); getServletBean(); proxy.init(getServletConfig()); } private void getServletBean() { WebApplicationContext wac = WebApplicationContextUtils .getRequiredWebApplicationContext(getServletContext()); this.proxy = (HttpServlet) wac.getBean(targetServlet); } public void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException, RuntimeException { proxy.service(request, response); } }