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);
    }
}

<%@ page contentType="text/html;charset=UTF-8" language="java" %>


Hello World!

    

<%--
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  User: 22729
  Date: 2021/7/30
  Time: 16:31
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--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>


    



    

        账户：
        
    
    

        密码：
        
    
    

        
    

<%--
  Created by IntelliJ IDEA.
  User: 22729
  Date: 2021/7/30
  Time: 16:51
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<%@ page contentType="text/html;charset=UTF-8" language="java" %>


    



    Succes

         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">

    
        requsetDemo01
        class>com.zhang.Servlet.RequestDemo01class>
    
    
        requsetDemo01
        /demo01