controllerservlet.java

老牌java开发的物流管理系统 详细的我也没有怎么看 好像是恒基的

package com.wl.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 com.wl.action.Action;
import com.wl.servletmanager.ServletManager;

public class ControllerServlet extends HttpServlet {

	/**
	 * 
	 */
	private static final long serialVersionUID = 1L;
	/**
	 * Initialization of the ServLet. 
	 */
	@Override
	public void init() throws ServletException {
		ServletManager manager = ServletManager.getInstance();
		manager.init();
	}
	/**
	 * Constructor of the object.
	 */
	public ControllerServlet() {
		super();
	}

	/**
	 * Destruction of the servLet. <br>
	 */
	public void destroy() {
		super.destroy(); 
	}

	/**
	 * 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
	 */
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		doService(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
	 */
	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		doService(request, response);
	}
	public void doService(HttpServletRequest request, HttpServletResponse response)
	throws ServletException, IOException {

		String path = request.getServletPath(); //从页面获取的action的值
        path = this.getPath(path);//处理后的action的值(去掉"/"和".")
        //进行路径处理
        ServletManager manager = ServletManager.getInstance();
        if(manager.containsKey(path)) {
        	Action action = manager.get(path);
            String result = action.doExcute(request, response);           
            request.getRequestDispatcher(result).forward(request, response);
        }
        else {
        	throw new RuntimeException("sorry,your path notExsit");
        }
   }
	/**
	 * 对字符串的截取
	 * @param path
	 * @return path
	 */
	public String getPath(String path) {
		int first = path.lastIndexOf("/");
		int last = path.lastIndexOf(".");
		if(path!=null) {
			path = path.substring(first+1,last);
		}
		else {
			 throw new RuntimeException("sorry,your path notExist");
		}
		return path;
	}
}