获取请求request的一些方法
<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>Insert title here</title> </head> <body> <h4>请在下面输入用户名及密码</h4> <form action="/WEBTEST2/FormDemo" method = "post"> 用户名：<input type = "text" name = "username"><br> 密码：<input type = "password" name = "password"><br> <input type = "checkbox" name = "zq" value = "zuqiu">足球 <input type = "checkbox" name = "Lq" value = "lanqiu">蓝球 <input type = "checkbox" name = "PPq" value = "pingpangqiu">乒乓球 <input type = "submit" value = "提交"><br> </form> </body> </html>
package com.king.demo; import java.io.IOException; import java.util.Enumeration; import java.util.Map; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; public class FormDemo extends HttpServlet { public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // 1、获得请求方式 String method = request.getMethod(); // 2、获得请求的资源相关内容 String URI = request.getRequestURI(); StringBuffer URL = request.getRequestURL(); String query = request.getQueryString(); String HEADER = request.getHeader("User-Agent");//取指定头名称 String username = request.getParameter("username");//指定请求体 String password = request.getParameter("password"); System.out.println(username + "...." + password); response.getWriter().write(username + "...." + password + "...." + method + "...." + URI + "...." + URL + ".." + query + ".." + HEADER); System.out.println(query); Map<String, String[]> parameterMap = request.getParameterMap();//以键值对获得请求体 for (Map.Entry<String, String[]> entry: parameterMap.entrySet()) { System.out.println(entry.getKey()); for (String str : entry.getValue()) { System.out.println(str); } } System.out.println("-------------------"); Enumeration<String> headername = request.getHeaderNames();//以枚举获取请求头 while (headername.hasMoreElements()) { String headname = headername.nextElement(); String namevalue = request.getHeader(headname); response.getWriter().write(headname + ":" + namevalue); System.out.println(headname + ":" + namevalue); } } public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doGet(request, response); } }
控制台输出如下
1....2
null
username
1
password
2
zq
zuqiu
Lq
lanqiu
-------------------
host:localhost:8080
connection:keep-alive
content-length:40
cache-control:max-age=0
origin:http://localhost:6356
upgrade-insecure-requests:1
content-type:application/x-www-form-urlencoded
user-agent:Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/65.0.3325.181 Safari/537.36
accept:text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8
referer:http://localhost:6356/WEBTEST2/form.html
accept-encoding:gzip, deflate, br