获取request的变量

由于IP代码未实现，先注释掉。

  1 package com.helloweenvsfei.servlet;
  2 
  3 import java.io.IOException;
  4 import java.io.PrintWriter;
  5 import java.security.Principal;
  6 import java.util.Locale;
  7 
  8 import javax.servlet.ServletException;
  9 import javax.servlet.http.HttpServlet;
 10 import javax.servlet.http.HttpServletRequest;
 11 import javax.servlet.http.HttpServletResponse;
 12 
 13 public class RequestServlet extends HttpServlet {
 14 
 15     private String getAccept(String accept) {
 16         StringBuffer buffer = new StringBuffer();
 17         if (accept.contains("image/gif"))
 18             buffer.append("GIF文件,");
 19         if (accept.contains("image/x-xbitmap"))
 20             buffer.append("BPM文件,");
 21         if (accept.contains("image/jpeg"))
 22             buffer.append("JPG文件");
 23         if (accept.contains("application/vnd.ms-excel"))
 24             buffer.append("Excel 文件, ");
 25         if (accept.contains("application/vnd.ms-powerpoint"))
 26             buffer.append("PPT 文件, ");
 27         if (accept.contains("application/msword"))
 28             buffer.append("Word 文件, ");
 29         return buffer.toString().replaceAll(", $", "");
 30     }
 31 
 32     private String getLocale(Locale locale) {
 33         if (Locale.SIMPLIFIED_CHINESE.equals(locale))
 34             return "简体中文";
 35         if (Locale.TRADITIONAL_CHINESE.equals(locale))
 36             return "繁体中文";
 37         if (Locale.ENGLISH.equals(locale))
 38             return "英文";
 39         if (Locale.JAPANESE.equals(locale))
 40             return "日文";
 41         return "未知语言环境";
 42     }
 43 
 44     // private String getAddress(String ip){
 45     // return IpUtil.getIpAddress(ip);
 46     // }
 47 
 48     private String getNavigator(String userAgent) {
 49         if (userAgent.indexOf("TencentTraveler") > 0)
 50             return "腾讯浏览器";
 51         if (userAgent.indexOf("Maxthon") > 0)
 52             return "Maxthon浏览器";
 53         if (userAgent.indexOf("MyIE2") > 0)
 54             return "MyIE2浏览器";
 55         if (userAgent.indexOf("Firefox") > 0)
 56             return "Firefox浏览器";
 57         if (userAgent.indexOf("MSIE") > 0)
 58             return "IE 浏览器";
 59         return "未知浏览器";
 60     }
 61 private String getOS(String userAgent){
 62     if(userAgent.indexOf("Windows NT 5.1") > 0)    return "Windows XP";
 63     if(userAgent.indexOf("Windows 98") > 0)    return "Windows 98";
 64     if(userAgent.indexOf("Windows NT 5.0") > 0)    return "Windows 2000";
 65     if(userAgent.indexOf("Linux") > 0)    return "Linux";
 66     if(userAgent.indexOf("Unix") > 0)    return "Unix";
 67     return "未知";
 68 }
 69 public void doGet(HttpServletRequest request,HttpServletResponse response)
 70 throws ServletException,IOException{
 71     request.setCharacterEncoding("UTF-8");
 72     response.setCharacterEncoding("UTF-8");
 73 
 74     response.setContentType("text/html");
 75     
 76     String authType = request.getAuthType();
 77     String localAddr = request.getLocalAddr();
 78     Locale locale = request.getLocale();
 79     String localName = request.getLocalName();
 80     String contextPath = request.getContextPath();
 81     int localPort = request.getLocalPort();
 82     String method = request.getMethod();
 83     String pathInfo = request.getPathInfo();
 84     String pathTranslated = request.getPathTranslated();
 85     String protocol = request.getProtocol();
 86     String queryString = request.getQueryString();
 87     String remoteAddr = request.getRemoteAddr();
 88     int port = request.getRemotePort();
 89     String remoteUser = request.getRemoteUser();
 90     String requestedSessionId = request.getRequestedSessionId();
 91     String requestURI = request.getRequestURI();
 92     StringBuffer requestURL = request.getRequestURL();
 93     String scheme = request.getScheme();
 94     String serverName = request.getServerName();
 95     int serverPort = request.getServerPort();
 96     String servletPath = request.getServletPath();
 97     Principal userPrincipal = request.getUserPrincipal();
 98     
 99     String accept = request.getHeader("accept");
100     String referer = request.getHeader("referer");
101     String userAgent = request.getHeader("user-agent");
102     
103     String serverInfo = this.getServletContext().getServerInfo();
104     
105     PrintWriter out = response.getWriter();
106     out.println("<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">");
107     out.println("<HTML>");
108     
109     // 这里<title></title>之间的信息在浏览器中显示为标题
110     out.println("  <HEAD><TITLE>Request Servlet</TITLE></HEAD>");
111     out.println("  <style>body, font, td, div {font-size:12px; line-height:18px; }</style>");
112     out.println("  <BODY>");
113     
114     out.println("<b>您的IP为</b> " + remoteAddr +  "<b>；您使用</b> " + getOS(userAgent) + " <b>操作系统</b>，" + getNavigator(userAgent) + " <b>。您使用</b> " + getLocale(locale) + "。<br/>");
115     out.println("<b>服务器IP为</b> " + localAddr + "<b>；服务器使用</b> " + serverPort + " <b>端口，您的浏览器使用了</b> " + port + " <b>端口访问本网页。</b><br/>");
116     out.println("<b>服务器软件为</b>：" + serverInfo + "。<b>服务器名称为</b> " + localName + "。<br/>");
117     out.println("<b>您的浏览器接受</b> " + getAccept(accept) + "。<br/>");
118     out.println("<b>您从</b> " + referer + " <b>访问到该页面。</b><br/>");
119     out.println("<b>使用的协议为</b> " + protocol + "。<b>URL协议头</b> " + scheme + "，<b>服务器名称</b> " + serverName + "，<b>您访问的URI为</b> " + requestURI + "。<br/>" );
120     out.println("<b>该 Servlet 路径为</b> " + servletPath + "，<b>该 Servlet 类名为</b> " + this.getClass().getName() + "。<br/>");
121     out.println("<b>本应用程序在硬盘的根目录为</b> " + this.getServletContext().getRealPath("") + "，<b>网络相对路径为</b> " + contextPath + "。 <br/>");
122     
123     out.println("<br/>");
124             
125     out.println("<br/><br/><a href=" + requestURI + "> 点击刷新本页面 </a>");
126     
127     out.println("  </BODY>");
128     out.println("</HTML>");
129     out.flush();
130     out.close();
131 }
132 }

RequestServlet.java

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 
    http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
    <servlet>
        <servlet-name>FirstServlet</servlet-name>
        <servlet-class>com.helloweenvsfei.servlet.FirstServlet</servlet-class>
        <init-param>
            <param-name>message</param-name>
            <param-value>welcome to FirstServlet</param-value>
        </init-param>
        <init-param>
            <param-name>encoding</param-name>
            <param-value>utf-8</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet>
        <servlet-name>RequestServlet</servlet-name>
        <servlet-class>com.helloweenvsfei.servlet.RequestServlet</servlet-class>
    </servlet>
    <servlet-mapping>
        <servlet-name>FirstServlet</servlet-name>
        <url-pattern>/servlet/FirstServlet</url-pattern>
        <url-pattern>/servlet/FirstServlet.asp</url-pattern>
        <url-pattern>/servlet/FirstServlet.php</url-pattern>
        <url-pattern>/servlet/FirstServlet.jsp</url-pattern>
        <url-pattern>/servlet/FirstServlet.aspx</url-pattern>
    </servlet-mapping>
        <servlet-mapping>
        <servlet-name>RequestServlet</servlet-name>
        <url-pattern>/servlet/RequestServlet</url-pattern>
    </servlet-mapping>
</web-app>

web.xml

相关阅读:
【Azure 应用服务】由 Azure Functions runtime is unreachable 的错误消息推导出 ASYNC(异步）和 SYNC(同步）混用而引起ThreadPool耗尽问题
 【Azure API 管理】是否可以将Swagger 的API定义导入导Azure API Management中
 【Azure 应用服务】Azure Function 不能被触发
 【Azure 环境】Azure Key Vault (密钥保管库)中所保管的Keys, Secrets，Certificates是否可以实现数据粒度的权限控制呢？
【Azure 事件中心】为应用程序网关(Application Gateway with WAF) 配置诊断日志，发送到事件中心
 【Azure 事件中心】azure-spring-cloud-stream-binder-eventhubs客户端组件问题, 实践消息非顺序可达
 【Azure API 管理】Azure API Management通过请求中的Path来限定其被访问的频率(如1秒一次)
【Azure 环境】前端Web通过Azure AD获取Token时发生跨域问题(CORS Error)
【Azure 应用服务】记一次Azure Spring Cloud 的部署错误 (az spring-cloud app deploy -g dev -s testdemo -n demo -p ./hellospring-0.0.1-SNAPSHOT.jar --->>> Failed to wait for deployment instances to be ready)
【Azure 应用服务】App Service中抓取 Web Job 的 DUMP 办法
原文地址：https://www.cnblogs.com/ys-wuhan/p/5893166.html