java invoke servlet

package com.iyunti.core;

import java.io.IOException;
import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.Map;

import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.sql.DataSource;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springframework.jdbc.core.JdbcTemplate;

public class Dispatcher extends Controller {

	private static final long serialVersionUID = 8396066198989032944L;

	private ServletContext servletContext = null;

	/**
	 * The doGet method of the servlet. <br>
	 * 
	 * This method is called when a form has its tag value method equals to get.
	 * 
	 * @param request
	 *            the request send by the client to the server
	 * @param response
	 *            the response send by the server to the client
	 * @throws ServletException
	 *             if an error occurred
	 * @throws IOException
	 *             if an error occurred
	 */
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		/*
		 * ApplicationContext act = new ClassPathXmlApplicationContext(
		 * "applicationContext.xml"); DataSource ds = (DataSource)
		 * act.getBean("dataSource");
		 * 
		 * JdbcTemplate template = new JdbcTemplate(ds); String sql =
		 * "select count(*) from T_ACCOUNT";
		 * 
		 * int totalRecord = template.queryForInt(sql);
		 * 
		 * new Product().doGet(request, response);
		 */
		// Map<String, Class<?>> classMap = (Map<String, Class<?>>)
		// servletContext
		// .getAttribute("servletClassMap");
		String uri = getUriString(request);

		// 获取要请求的servlet路径
		String requestServletName = "com.iyunti.ec." + getActionString(uri);

		// 创建类的实例
		Object obj = null;
		Class<?> clz = null;

		Method targetMethod = null;
		try {
			// 获取要使用的Servlet类
			clz = Class.forName(requestServletName);
			
			if(clz.equals(null)){
				logger.error("Servlet类不存在"); 
			}

			obj = clz.newInstance();

			// 获取Servlet类的doGet方法
			targetMethod = clz.getDeclaredMethod("doGet",
					HttpServletRequest.class, HttpServletResponse.class);

			// 调用对象的方法进行处理
			targetMethod.invoke(obj, request, response);

		} catch (Exception e) {
			logger.error(e.getMessage());
		}

		loadJsp(request, response);
	}

	/**
	 * The doPost method of the servlet. <br>
	 * 
	 * This method is called when a form has its tag value method equals to
	 * post.
	 * 
	 * @param request
	 *            the request send by the client to the server
	 * @param response
	 *            the response send by the server to the client
	 * @throws ServletException
	 *             if an error occurred
	 * @throws IOException
	 *             if an error occurred
	 */
	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		this.doGet(request, response);
	}

}