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);
    }
}
 

更多内容请见原文，原文转载自：https://blog.csdn.net/qq_44594371/article/details/103157675