实现步骤:
(1)创建servlet BrowserServer
(2)调用HttpServletRequest对象的getServerName()方法获取服务器名称
(3)调用HttpServletRequest对象的getServerPort()方法获取服务器端口
(4)首先调用getServletContext()方法获取ServletContext对象,然后调用ServletContext对象的getServerInfo()方法获取服务器环境信息名称、版本信息
(5)利用HttpServletResponse对象的PrintWriter将信息显示到页面
package example.servlet;import java.io.IOException;import java.io.PrintWriter;import javax.servlet.ServletContext;import javax.servlet.ServletException;import javax.servlet.annotation.WebServlet;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;/** * Servlet implementation class BrowserServer */@WebServlet("/BrowserServer")public class BrowserServer extends HttpServlet { private static final long serialVersionUID = 1L; protected void processRequest(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.setContentType("text/html;charset=utf-8"); PrintWriter out=response.getWriter(); ServletContext context=getServletContext(); out.println("<html>"); out.println("<head>"); out.println("<title>服务器信息</title>"); out.println("</head>"); out.println("<body>"); out.println("<h3>服务器名称:"+request.getServerName()+"</h3>"); out.println("<h3>服务器端口:"+request.getServerPort()+"</h3>"); out.println("<h3>"+context.getServerInfo()+"</h3>"); out.println("</body>"); out.println("<html>"); out.close(); } protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { processRequest(request,response); } protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { processRequest(request,response); }}
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