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2024-11-15 06:20:07 来源：阴底画线源码

1.求jsp登录源码 急急急急急急急急急急急
2.JSP运行原理什么

考务管理系统源码jsp_考务管理系统源码

求jsp登录源码 急急急急急急急急急急急

       登陆页面 index.jsp源码：

       <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>

       <%

       String path = request.getContextPath();

       String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";

       %>

       <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4. Transitional//EN">

       <html>

        <head>

        <base href="<%=basePath%>">

        <title>login</title>

        <meta http-equiv="pragma" content="no-cache">

        <meta http-equiv="cache-control" content="no-cache">

        <meta http-equiv="expires" content="0">

        <meta http-equiv="keywords" content="keyword1,考务p考keyword2,keyword3">

        <meta http-equiv="description" content="This is my page">

        <!--

        <link rel="stylesheet" type="text/css" href="styles.css">

        -->

        </head>

        <body>

        <form action="LoginServlet" method="post">

        用户名：<input type="text" name="username" ><br>

        密码:<input type="password" name="userpass"><br>

        <input type="submit" value="登陆"> <input type="reset" value="取消">

        </form>

       </body>

       </html>

       -------------

       LoginServlet.java 源码：

       package servlet;

       import java.io.IOException;

       import java.io.PrintWriter;

       import javax.servlet.ServletException;

       import javax.servlet.http.HttpServlet;

       import javax.servlet.http.HttpServletRequest;

       import javax.servlet.http.HttpServletResponse;

       public class LoginServlet extends HttpServlet {

        /

**

        * Constructor of the object.

        */

        public LoginServlet() {

        super();

        }

        /

**

        * Destruction of the servlet. <br>

        */

        public void destroy() {

        super.destroy(); // Just puts "destroy" string in log

        // Put your code here

        }

        /

**

        * The doGet method of the servlet. <br>

       

*

        * This method is called when a form has its tag value method equals to get.

        *

        * @param request the request send by the client to the server

        * @param response the response send by the server to the client

        * @throws ServletException if an error occurred

        * @throws IOException if an error occurred

        */

        public void doGet(HttpServletRequest request, HttpServletResponse response)

        throws ServletException, IOException {

        //获得jsp页面传输的参数

        String username=request.getParameter("username");

        String userpass=request.getParameter("userpass");

        //判断

        if(username.equals("user")&&userpass.equals("")){

        response.sendRedirect("1.jsp");

        }else if(username.equals("admin")&&userpass.equals("")){

        response.sendRedirect("2.jsp");

        }else{

        response.sendRedirect("index.jsp");

        }

        }

        /

**

        * The doPost method of the servlet. <br>

       

*

        * This method is called when a form has its tag value method equals to post.

        *

        * @param request the request send by the client to the server

        * @param response the response send by the server to the client

        * @throws ServletException if an error occurred

        * @throws IOException if an error occurred

        */

        public void doPost(HttpServletRequest request, HttpServletResponse response)

        throws ServletException, IOException {

        this.doGet(request, response);

        }

        /

**

        * Initialization of the servlet. <br>

       

*

        * @throws ServletException if an error occurs

        */

        public void init() throws ServletException {

        // Put your code here

        }

       }

       -------------

       1.jsp:

       <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>

       <%

       String path = request.getContextPath();

       String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";

       %>

       <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4. Transitional//EN">

       <html>

        <head>

        <base href="<%=basePath%>">

        <title>My JSP '1.jsp' starting page</title>

        <meta http-equiv="pragma" content="no-cache">

        <meta http-equiv="cache-control" content="no-cache">

        <meta http-equiv="expires" content="0">

        <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">

        <meta http-equiv="description" content="This is my page">

        <!--

        <link rel="stylesheet" type="text/css" href="styles.css">

        -->

        </head>

        <body>

        This is 1.jsp <br>

        </body>

       </html>

       -------------

       2.jsp

       <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>

       <%

       String path = request.getContextPath();

       String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";

       %>

       <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4. Transitional//EN">

       <html>

        <head>

        <base href="<%=basePath%>">

        <title>My JSP '1.jsp' starting page</title>

        <meta http-equiv="pragma" content="no-cache">

        <meta http-equiv="cache-control" content="no-cache">

        <meta http-equiv="expires" content="0">

        <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">

        <meta http-equiv="description" content="This is my page">

        <!--

        <link rel="stylesheet" type="text/css" href="styles.css">

        -->

        </head>

        <body>

        This is 2.jsp <br>

        </body>

       </html>

JSP运行原理什么

       JSP运行的底层机制可以概括为以下几个步骤：首先，当服务器接收到JSP请求时，管理JSP引擎会对JSP文件进行初步处理。系统这个阶段，源码价量同显源码JSP引擎会尝试将JSP代码转换为Java源代码，理系任何语法错误都会立即引发转换中断，统源奔驰宝马手机版源码查询并在客户端和服务端显示出错信息。考务p考

       一旦转换顺利，管理JSP引擎会利用Java编译器Javac将生成的系统Java源文件编译成Class文件，这是源码一种可执行的二进制格式。这一步确保了代码的理系高效执行，为系统提供了更好的统源并发处理能力，提升了响应速度。考务p考泸州老窖溯源码怎么扫然而，管理值得注意的系统是，多线程技术虽然能提升性能，支持当面付的发卡源码但同时也需要开发者严格遵守编程规范，因为多线程环境可能会带来并发问题和资源管理挑战。因此，自动点餐系统源码错误在设计多线程应用时，理解并遵循相关约束是至关重要的。

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