用servlet获得服务器和客户端信息_获得服务器信息的servlet-优快云博客

本文链接：https://blog.youkuaiyun.com/aescoty/article/details/5310847

本文介绍了一个简单的Servlet示例，该示例用于获取HTTP请求中的服务器相关信息，包括服务器名称、IP地址、端口等，并通过HTML页面展示这些信息。

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package com.lzg.webproject1;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.Enumeration;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class GetServerInfoServlet extends HttpServlet {

 /**
 *
 */
 private static final long serialVersionUID = 1L;

 /**
 * The doGet method of the servlet. 
 *
 * This method is called when a form has its tag value method equals to get.
 *
 * @param request the request send by the client to the server
 * @param response the response send by the server to the client
 * @throws ServletException if an error occurred
 * @throws IOException if an error occurred
 */
 public void doGet(HttpServletRequest request, HttpServletResponse response)
 throws ServletException, IOException {

 response.setContentType("text/html");
 PrintWriter out = response.getWriter();
 out
 .println("<!DOCTYPE HTML PUBLIC /"-//W3C//DTD HTML 4.01 Transitional//EN/">");
 out.println("<HTML>");
 out.println(" <HEAD><TITLE>A Servlet</TITLE></HEAD>");
 out.println(" <BODY>");
 out.println(" <table>");
 printContent(request, out);
 out.println(" </table>");
 out.println(" </BODY>");
 out.println("</HTML>");
 out.flush();
 out.close();
 }
 public void printContent(HttpServletRequest request,PrintWriter out)
 {
 Enumeration e = request.getHeaderNames();
 out.println("server name:"+request.getServerName()+"");
 out.println("server ip"+request.getRemoteAddr()+"");
 out.println("server port"+request.getServerPort()+"");
 out.println("server protocol:"+request.getRemoteAddr()+"");
 out.println("server contextpath:"+request.getContextPath()+"");
 out.println("server scheme:"+request.getScheme()+"");
 out.println("server method:"+request.getMethod()+"");
 out.println("server uri:"+request.getRequestURI()+"");
 String name = "";
 while (e.hasMoreElements())
 {
 name = (String)e.nextElement();
 out.println(name+":"+request.getHeader(name)+"");

 }

 }

}