java代码：
1 package servlet_pack;
2
3 import java.io.IOException;
4 import java.io.PrintWriter;
5 import java.util.Enumeration;
6
7 import javax.servlet.ServletException;
8 import javax.servlet.annotation.WebServlet;
9 import javax.servlet.http.HttpServlet;
10 import javax.servlet.http.HttpServletRequest;
11 import javax.servlet.http.HttpServletResponse;
12
13 /**
14 * Servlet implementation class RequestHeaderServlet
15 */
16 @WebServlet("/RequestHeaderServlet")
17 public class RequestHeaderServlet extends HttpServlet {
18 private static final long serialVersionUID = 1L;
19
20 /**
21 * @see HttpServlet#HttpServlet()
22 */
23 public RequestHeaderServlet() {
24 super();
25 }
26
27 /**
28 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
29 */
30 protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
31 Enumeration enu = request.getHeaderNames();
32 response.setContentType("text/html");
33 PrintWriter out = response.getWriter();
34 out.print("<!DOCTYPE html>");
35 out.print("<html>");
36 out.print("<head>");
37 out.print("<title>A Servlet</title>");
38 out.print("</head>");
39 out.print("<body>");
40 out.print("<table>");
41
42 out.print("<tr>");
43 out.print("<th>");
44 out.print("HeaderName");
45 out.print("</th>");
46 out.print("<th>");
47 out.print("HeaderValue");
48 out.print("</th>");
49 out.print("</tr>");
50
51 while(enu.hasMoreElements()){
52 String headerName = (String)enu.nextElement();
53 String headerValue = request.getHeader(headerName);
54
55 out.print("<tr>");
56 out.print("<td>");
57 out.print(headerName);
58 out.print("</td>");
59 out.print("<td>");
60 out.print(headerValue);
61 out.print("</td>");
62 out.print("</tr>");
63 }
64
65 out.print("</table>");
66 out.print("</body>");
67 out.print("</html>");
68 }
69
70 /**
71 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
72 */
73 protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
74 doGet(request, response);
75 }
76
77 }
Test.html
1 <!DOCTYPE html> 2 <html> 3 <head> 4 <meta charset="UTF-8"> 5 <title>Insert title here</title> 6 </head> 7 <body> 8 <form name="f1" action="/4_Servlet_Request_Header/RequestHeaderServlet" method="get"> 9 <table> 10 <tr> 11 <td>用户名:</td> 12 <td><input type="text" name="username"></td> 13 </tr> 14 15 <tr> 16 <td>密码:</td> 17 <td><input type="password" name="password"></td> 18 </tr> 19 <tr> 20 <td colspan="2" align="center"><input type="submit" value="注册"></td> 21 </tr> 22 </table> 23 </form> 24 </body> 25 </html>
运行结果：
原文地址：https://www.cnblogs.com/ACGame/p/8451506.html
时间： 2024-08-08 00:40:07