4.从env-entry获取：（视频下载） （全部书籍）

马克-to-win：用env-entry存放的参数，本个web应用中的任何servlet，jsp都可以获得。和context-param相比，env-entry存放的参数不止为String类型。下面的comp是component的意思。

例：1.4.1

ServletHello1.java：
 

package com;

import java.io.IOException;
import java.io.InputStream;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class ServletHello1 extends HttpServlet {
    public void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        Context ctx;
        boolean isReady = false;

详情请见：http://www.mark-to-win.com/index.html?content=Jsp/jspUrl.html&chapter=Jsp/jsp2_web.html#GetParamWithenv-entry