noteservlet.java

java web开发宝典源代码

package com.yxq.servlet;

import java.io.IOException;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.Map;

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

import com.yxq.bean.Change;
import com.yxq.myaction.MyAction;

public class NoteServlet extends HttpServlet {
	private Map<String,MyAction> myActions=null;
	
	public void init() throws ServletException {
		myActions=new HashMap<String,MyAction>();
		Enumeration em=this.getInitParameterNames();
		while(em.hasMoreElements()){
			String paramName=(String)em.nextElement();
			String className=getInitParameter(paramName);
			MyAction myAction=null;
			try {
				myAction = (MyAction)Class.forName(className).newInstance();
			} catch (Exception e) {
				e.printStackTrace();
			}
			myActions.put(paramName,myAction);
		}
	}

	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		doPost(request,response);
	}

	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		String actionName=Change.StrSub(request.getPathInfo());
		if(actionName==null||actionName.equals("")){
			System.out.println("请选择您要进行的操作！");			
		}
		else{
			MyAction myAction=myActions.get(actionName);
			if(myAction==null){
				System.out.println("请求参数 ："+actionName+" 指定的类不存在！");
			}
			else{
				myAction.runOne(this,request,response);
			}
		}		
	}
}