TypeScript 的安裝 和 VSCODE 配置自動編譯
阿新 • • 發佈：2021-07-18
HttpServletRequest
Request請求和Response響應相對應。
以下是模擬登入然後重定向到特定網頁
jsp中：${pageContext.request.contextPath}可以獲得網頁頁面的絕對路徑。
首先是：RequestDemo01類
public class RequestDemo01 extends HttpServlet { @Override protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { ServletContext servletContext= this.getServletContext(); resp.setContentType("text/html"); resp.setCharacterEncoding("utf-8"); resp.sendRedirect("/ServletTestDemo_war/TestDemo.jsp"); String username = req.getParameter("username"); String password = req.getParameter("password"); System.out.println(username+ "\n" + password); } @Override protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { super.doPost(req, resp); } }
然後是index.jsp初始網頁
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<body>
<h2>Hello World!</h2>
<a href="http://localhost:8080/ServletTestDemo_war/demo01">
<input type="button" name="button" value="點我登陸">
</a>
</body>
</html>然後是TestDemo.jsp測試網頁
<%-- Created by IntelliJ IDEA. User: 22729 Date: 2021/7/30 Time: 16:31 To change this template use File | Settings | File Templates. --%> <%@ page contentType="text/html;charset=UTF-8" language="java" %> <html> <head> <title>TestDemo</title> </head> <body> <form action="${pageContext.request.contextPath}/ResultDemo.jsp" method="get"> <p> <span>賬戶：</span> <input type="text" name="username"> </p> <p> <span>密碼：</span> <input type="password" name="password"> </p> <p> <input type="submit" name="submit"> </p> </form> </body> </html>
最後是ResultDemo.jsp
<%-- Created by IntelliJ IDEA. User: 22729 Date: 2021/7/30 Time: 16:51 To change this template use File | Settings | File Templates. --%> <%@ page contentType="text/html;charset=UTF-8" language="java" %> <html> <head> <title>Result</title> </head> <body> <h1> Succes </h1> </body> </html>
web.xml
<?xml version="1.0" encoding="UTF-8"?> <web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd" version="4.0" metadata-complete="true"> <servlet> <servlet-name>requsetDemo01</servlet-name> <servlet-class>com.zhang.Servlet.RequestDemo01</servlet-class> </servlet> <servlet-mapping> <servlet-name>requsetDemo01</servlet-name> <url-pattern>/demo01</url-pattern> </servlet-mapping> </web-app>