如何从env-entry获取参数？

4.从env-entry获取：

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;

try {

ctx = new InitialContext();

Boolean b = (Boolean) ctx.lookup("java:comp/env/isReady");

isReady = b.booleanValue();

} catch (NamingException e) {

e.printStackTrace();

}

System.out.println("" + isReady);

}

}

更多请看：https://blog.csdn.net/qq_44594371/article/details/103157675