一个简单的jsp页面代码
时间: 2023-06-14 20:05:14 浏览: 25
以下是一个简单的 JSP 页面代码示例:
```jsp
<!DOCTYPE html>
<html>
<head>
<title>Welcome to my JSP page</title>
</head>
<body>
<h1>Hello, World!</h1>
<p>Today is <%= new java.util.Date() %></p>
</body>
</html>
```
这个页面会输出 "Hello, World!",并在页面上显示当前时间。其中的 `<%= new java.util.Date() %>` 是 JSP 的表达式语法,用于在页面上输出 Java 代码的执行结果。在这个例子中,我们通过 `java.util.Date()` 获取了当前时间并输出到页面上。
相关问题
写一个简单的jsp页面案例
好的,以下是一个简单的 JSP 页面案例:
```jsp
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>欢迎来到 JSP 页面</title>
</head>
<body>
<h1>欢迎来到 JSP 页面</h1>
<p>当前时间是:<%= new java.util.Date() %></p>
<form action="submit.jsp" method="post">
<label for="name">请输入您的姓名:</label>
<input type="text" name="name" required>
<br>
<label for="email">请输入您的邮箱:</label>
<input type="email" name="email" required>
<br>
<button type="submit">提交</button>
</form>
</body>
</html>
```
该 JSP 页面包含了一个欢迎信息和一个表单,用户可以在表单中输入姓名和邮箱,并提交到 `submit.jsp` 页面进行处理。在欢迎信息中,使用了 JSP 的表达式 `<%= expression %>` 来输出当前时间。在表单中,使用了 HTML 标签来创建输入框和按钮,同时使用了 JSP 的动态代码块 `<% code %>` 来指定表单的提交地址。
写一个jsp注册代码
### 回答1:
好的,这是一个简单的 JSP 注册代码示例:
```
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>注册页面</title>
</head>
<body>
<form action="register" method="post">
用户名:<input type="text" name="username"><br>
密码:<input type="password" name="password"><br>
确认密码:<input type="password" name="password2"><br>
<input type="submit" value="注册">
</form>
</body>
</html>
```
上面的代码实现了一个注册表单,用户输入用户名、密码和确认密码后点击注册按钮,提交表单。表单的提交地址是 `register`,方法是 `post`。
你还可以在表单中添加其他字段,例如电子邮件地址、手机号码等。
希望这对你有帮助。
### 回答2:
下面是一个简单的JSP注册页面的示例代码:
```jsp
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>用户注册</title>
</head>
<body>
<h2>用户注册</h2>
<form action="register.jsp" method="post">
<label for="username">用户名:</label>
<input type="text" id="username" name="username" required><br>
<label for="password">密码:</label>
<input type="password" id="password" name="password" required><br>
<input type="submit" value="注册">
</form>
</body>
</html>
```
在上面的代码中,我们创建了一个名为register.jsp的JSP文件,用于展示注册页面。用户可以输入用户名和密码,然后点击“注册”按钮提交表单。
要处理注册逻辑,创建一个名为register.jsp的新文件,并添加以下代码:
```jsp
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<%@ page import="java.sql.*" %>
<%
// 获取表单提交的用户名和密码
String username = request.getParameter("username");
String password = request.getParameter("password");
// 数据库连接信息
String url = "jdbc:mysql://localhost:3306/mydatabase";
String dbUsername = "root";
String dbPassword = "password";
// 注册用户
try {
Class.forName("com.mysql.jdbc.Driver");
Connection conn = DriverManager.getConnection(url, dbUsername, dbPassword);
String sql = "INSERT INTO users (username, password) VALUES (?, ?)";
PreparedStatement pstmt = conn.prepareStatement(sql);
pstmt.setString(1, username);
pstmt.setString(2, password);
pstmt.executeUpdate();
pstmt.close();
conn.close();
out.println("注册成功!");
} catch (Exception e) {
out.println("注册失败:" + e.getMessage());
e.printStackTrace();
}
%>
```
上述代码首先获取到注册页面提交的用户名和密码,并将它们插入到数据库表中。在本例中,我们使用MySQL作为数据库,需要提供正确的数据库连接信息。如果注册成功,将输出"注册成功!";如果失败,将输出失败原因并打印异常堆栈信息。
请注意,在实际开发中,代码安全性和用户输入合法性校验是非常重要的,上述示例只是一个基本的注册功能示例,并未包含安全性和验证功能。
### 回答3:
下面是一个简单的JSP注册代码的示例:
```jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>用户注册</title>
</head>
<body>
<h1>用户注册</h1>
<form action="register.jsp" method="post">
<label for="username">用户名:</label>
<input type="text" id="username" name="username" required><br>
<label for="password">密码:</label>
<input type="password" id="password" name="password" required><br>
<label for="confirmPassword">确认密码:</label>
<input type="password" id="confirmPassword" name="confirmPassword" required><br>
<input type="submit" value="注册">
</form>
<%-- 处理注册请求 --%>
<%@ page import="java.io.PrintWriter" %>
<%
String username = request.getParameter("username");
String password = request.getParameter("password");
String confirmPassword = request.getParameter("confirmPassword");
PrintWriter out = response.getWriter();
if (username != null && password != null && confirmPassword != null) {
if (!password.equals(confirmPassword)) {
out.println("<p>密码和确认密码不匹配!</p>");
} else {
// 这里根据具体需求将用户信息保存到数据库或其他地方
out.println("<p>注册成功!</p>");
}
}
%>
</body>
</html>
```
这个示例中,首先展示了一个注册表单,用户需要输入用户名、密码和确认密码。当用户点击注册按钮后,表单的数据会通过POST请求提交给`register.jsp`进行处理。处理的逻辑部分在`<% %>`标签内实现,首先获取表单中的用户名、密码和确认密码,然后进行一些简单的验证。如果密码和确认密码不匹配,则会输出错误信息;如果验证通过,则可以将用户信息保存到数据库或其他地方。
需要注意的是,这个示例只是一个简单的注册代码示例,实际运用时可能需要进行更多的验证和安全性处理。
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由于不同学校的教务系统页面设计可能不同,这里只提供一个基本的教务系统页面作为示例。以下是四个页面的源代码(JSP):
1. 登录页面(login.jsp)
<!DOCTYPE html>
<html>
<head>
<title>教务系统登录</title>
</head>
<body>
教务系统登录
<form action="logincheck.jsp" method="post">
<label for="username">用户名:</label>
<input type="text" id="username" name="username" required>
<label for="password">密码:</label> <input type="password" id="password" name="password" required>
<input type="submit" value="登录"> </form> </body> </html> 2. 登录验证页面(logincheck.jsp) <%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <% String username = request.getParameter("username"); String password = request.getParameter("password"); // 在此处进行登录验证,如果用户名和密码正确,则将用户信息保存到 session 中 // 如果验证失败,则跳转回登录页面,并显示错误信息 %> <!DOCTYPE html> <html> <head> <title>登录验证</title> </head> <body> 登录验证 <% if (/* 验证成功 */) { session.setAttribute("username", username); response.sendRedirect("homepage.jsp"); } else { out.println("用户名或密码错误,请重新登录!"); out.println("返回登录页面"); } %> </body> </html> 3. 主页(homepage.jsp) <%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!DOCTYPE html> <html> <head> <title>教务系统主页</title> </head> <body> 欢迎来到教务系统! 你好,<%= session.getAttribute("username") %>! 查看课程表 查看成绩单 退出登录 </body> </html> 4. 退出登录页面(logout.jsp) <%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!DOCTYPE html> <html> <head> <title>退出登录</title> </head> <body> 退出登录 你已成功退出登录。 返回登录页面 <% session.invalidate(); %> </body> </html>
<label for="password">密码:</label> <input type="password" id="password" name="password" required>
<input type="submit" value="登录"> </form> </body> </html> 2. 登录验证页面(logincheck.jsp) <%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <% String username = request.getParameter("username"); String password = request.getParameter("password"); // 在此处进行登录验证,如果用户名和密码正确,则将用户信息保存到 session 中 // 如果验证失败,则跳转回登录页面,并显示错误信息 %> <!DOCTYPE html> <html> <head> <title>登录验证</title> </head> <body> 登录验证 <% if (/* 验证成功 */) { session.setAttribute("username", username); response.sendRedirect("homepage.jsp"); } else { out.println("用户名或密码错误,请重新登录!"); out.println("返回登录页面"); } %> </body> </html> 3. 主页(homepage.jsp) <%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!DOCTYPE html> <html> <head> <title>教务系统主页</title> </head> <body> 欢迎来到教务系统! 你好,<%= session.getAttribute("username") %>! 查看课程表 查看成绩单 退出登录 </body> </html> 4. 退出登录页面(logout.jsp) <%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!DOCTYPE html> <html> <head> <title>退出登录</title> </head> <body> 退出登录 你已成功退出登录。 返回登录页面 <% session.invalidate(); %> </body> </html>




好的,下面是一个简单的通知公告网页代码示例:
1.公告列表页面notice_list.jsp:
html
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>通知公告</title>
<script src="https://cdn.bootcss.com/jquery/3.2.1/jquery.min.js"></script>
<script src="https://cdn.bootcss.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
</head>
<body>
通知公告
标题
创建时间
<c:forEach items="${notices}" var="notice">
${notice.title}
${notice.createTime}
</c:forEach>
添加公告
</body>
</html>
2.公告详情页面notice_detail.jsp:
html
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>${notice.title}</title>
<script src="https://cdn.bootcss.com/jquery/3.2.1/jquery.min.js"></script>
<script src="https://cdn.bootcss.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
</head>
<body>
${notice.title}
${notice.content}
${notice.createTime}
返回列表
</body>
</html>
3.添加公告页面notice_add.jsp:
html
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>添加公告</title>
<script src="https://cdn.bootcss.com/jquery/3.2.1/jquery.min.js"></script>
<script src="https://cdn.bootcss.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
</head>
<body>
添加公告
<form role="form" action="notice_add.do" method="post">
<label for="title">标题</label>
<input type="text" class="form-control" id="title" name="title">
<label for="content">内容</label>
<textarea class="form-control" id="content" name="content"></textarea>
<button type="submit" class="btn btn-primary">提交</button>
取消
</form>
</body>
</html>
4.公告列表页面对应的Servlet代码NoticeListServlet.java:
java
package com.example.servlet;
import java.io.IOException;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.example.dao.NoticeDao;
import com.example.model.Notice;
@WebServlet("/notice_list.jsp")
public class NoticeListServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
private NoticeDao noticeDao;
public NoticeListServlet() {
super();
noticeDao = new NoticeDao();
}
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
List<Notice> notices = noticeDao.getAll();
request.setAttribute("notices", notices);
request.getRequestDispatcher("/WEB-INF/jsp/notice_list.jsp").forward(request, response);
}
}
5.公告详情页面对应的Servlet代码NoticeDetailServlet.java:
java
package com.example.servlet;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.example.dao.NoticeDao;
import com.example.model.Notice;
@WebServlet("/notice_detail.jsp")
public class NoticeDetailServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
private NoticeDao noticeDao;
public NoticeDetailServlet() {
super();
noticeDao = new NoticeDao();
}
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
int id = Integer.parseInt(request.getParameter("id"));
Notice notice = noticeDao.getById(id);
request.setAttribute("notice", notice);
request.getRequestDispatcher("/WEB-INF/jsp/notice_detail.jsp").forward(request, response);
}
}
6.添加公告页面对应的Servlet代码NoticeAddServlet.java:
java
package com.example.servlet;
import java.io.IOException;
import java.time.LocalDateTime;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.example.dao.NoticeDao;
import com.example.model.Notice;
@WebServlet("/notice_add.do")
public class NoticeAddServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
private NoticeDao noticeDao;
public NoticeAddServlet() {
super();
noticeDao = new NoticeDao();
}
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
String title = request.getParameter("title");
String content = request.getParameter("content");
LocalDateTime createTime = LocalDateTime.now();
Notice notice = new Notice(title, content, createTime);
noticeDao.add(notice);
response.sendRedirect("notice_list.jsp");
}
}
以上代码仅供参考,具体实现可以根据具体需求进行调整。



根据提供的引用内容,我理解您需要一个完整的JSP登录系统,其中包括login.jsp页面。以下是一个简单的JSP登录系统的示例,其中包括login.jsp页面、loginCL.jsp登录验证页面和其他相关页面。
1. login.jsp页面代码:
jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Login Page</title>
</head>
<body>
Login Page
<form action="loginCL.jsp" method="post">
<label for="username">Username:</label>
<input type="text" id="username" name="username">
<label for="password">Password:</label> <input type="password" id="password" name="password">
<input type="submit" value="Login"> </form> </body> </html> 2. loginCL.jsp登录验证页面代码: jsp <%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <%@ page import="java.util.*" %> <!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>Login Check</title> </head> <body> <% String username = request.getParameter("username"); String password = request.getParameter("password"); if (username.equals("admin") && password.equals("123456")) { // 登录成功,将用户信息存储到session中 HttpSession session = request.getSession(); session.setAttribute("username", username); // 跳转到主页 response.sendRedirect("School.jsp"); } else { // 登录失败,返回登录页面 out.print("<script>alert('Username or password is incorrect!');window.location.href='login.jsp'</script>"); } %> </body> </html> 3. School.jsp页面代码: jsp <%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <%@ page import="java.util.*" %> <!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>School Page</title> </head> <body> Welcome to School Page <% HttpSession session = request.getSession(); String username = (String) session.getAttribute("username"); if (username == null) { // 用户未登录,跳转到登录页面 response.sendRedirect("login.jsp"); } %> Hello, <%= username %>! Please select your major: Computer Science Business Engineering </body> </html> 4. Major.jsp页面代码: jsp <%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <%@ page import="java.util.*" %> <!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>Major Page</title> </head> <body> Welcome to Major Page <% HttpSession session = request.getSession(); String username = (String) session.getAttribute("username"); String major = request.getParameter("major"); if (username == null) { // 用户未登录,跳转到登录页面 response.sendRedirect("login.jsp"); } %> Hello, <%= username %>! You have selected <%= major %> as your major. Please provide your personal information: <form action="Info.jsp" method="post"> <label for="name">Name:</label> <input type="text" id="name" name="name">
<label for="email">Email:</label> <input type="email" id="email" name="email">
<input type="submit" value="Submit"> </form> </body> </html> 5. Info.jsp页面代码: jsp <%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <%@ page import="java.util.*" %> <!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>Info Page</title> </head> <body> Welcome to Info Page <% HttpSession session = request.getSession(); String username = (String) session.getAttribute("username"); String name = request.getParameter("name"); String email = request.getParameter("email"); if (username == null) { // 用户未登录,跳转到登录页面 response.sendRedirect("login.jsp"); } %> Hello, <%= username %>! Your name is <%= name %> and your email is <%= email %>. Thank you for submitting your information. </body> </html>
<label for="password">Password:</label> <input type="password" id="password" name="password">
<input type="submit" value="Login"> </form> </body> </html> 2. loginCL.jsp登录验证页面代码: jsp <%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <%@ page import="java.util.*" %> <!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>Login Check</title> </head> <body> <% String username = request.getParameter("username"); String password = request.getParameter("password"); if (username.equals("admin") && password.equals("123456")) { // 登录成功,将用户信息存储到session中 HttpSession session = request.getSession(); session.setAttribute("username", username); // 跳转到主页 response.sendRedirect("School.jsp"); } else { // 登录失败,返回登录页面 out.print("<script>alert('Username or password is incorrect!');window.location.href='login.jsp'</script>"); } %> </body> </html> 3. School.jsp页面代码: jsp <%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <%@ page import="java.util.*" %> <!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>School Page</title> </head> <body> Welcome to School Page <% HttpSession session = request.getSession(); String username = (String) session.getAttribute("username"); if (username == null) { // 用户未登录,跳转到登录页面 response.sendRedirect("login.jsp"); } %> Hello, <%= username %>! Please select your major: Computer Science Business Engineering </body> </html> 4. Major.jsp页面代码: jsp <%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <%@ page import="java.util.*" %> <!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>Major Page</title> </head> <body> Welcome to Major Page <% HttpSession session = request.getSession(); String username = (String) session.getAttribute("username"); String major = request.getParameter("major"); if (username == null) { // 用户未登录,跳转到登录页面 response.sendRedirect("login.jsp"); } %> Hello, <%= username %>! You have selected <%= major %> as your major. Please provide your personal information: <form action="Info.jsp" method="post"> <label for="name">Name:</label> <input type="text" id="name" name="name">
<label for="email">Email:</label> <input type="email" id="email" name="email">
<input type="submit" value="Submit"> </form> </body> </html> 5. Info.jsp页面代码: jsp <%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <%@ page import="java.util.*" %> <!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>Info Page</title> </head> <body> Welcome to Info Page <% HttpSession session = request.getSession(); String username = (String) session.getAttribute("username"); String name = request.getParameter("name"); String email = request.getParameter("email"); if (username == null) { // 用户未登录,跳转到登录页面 response.sendRedirect("login.jsp"); } %> Hello, <%= username %>! Your name is <%= name %> and your email is <%= email %>. Thank you for submitting your information. </body> </html>

