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java获取服务器基本信息

程序员文章站 2022-07-02 13:56:17
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getServl ......

  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);
    }

}