JSP(Java Server Pages)是一种基于Java技术的服务器端编程技术,用于创建动态网页。下面是一个简单的JSP学生选课系统的基本概念和示例代码。
以下是一个简单的JSP学生选课系统的示例代码,包括学生列表、课程列表和选课功能。
假设我们有以下三个表:
students
(学生表)courses
(课程表)enrollments
(选课记录表)students.jsp
)<%@ page import="java.util.List" %>
<%@ page import="com.example.Student" %>
<html>
<head>
<title>学生列表</title>
</head>
<body>
<h1>学生列表</h1>
<ul>
<%
List<Student> students = (List<Student>) request.getAttribute("students");
for (Student student : students) { %>
<li><%= student.getName() %> - <%= student.getId() %></li>
<% } %>
</ul>
</body>
</html>
courses.jsp
)<%@ page import="java.util.List" %>
<%@ page import="com.example.Course" %>
<html>
<head>
<title>课程列表</title>
</head>
<body>
<h1>课程列表</h1>
<ul>
<%
List<Course> courses = (List<Course>) request.getAttribute("courses");
for (Course course : courses) { %>
<li><%= course.getName() %> - <%= course.getId() %></li>
<% } %>
</ul>
</body>
</html>
enroll.jsp
)<%@ page import="com.example.EnrollmentService" %>
<html>
<head>
<title>选课</title>
</head>
<body>
<h1>选课</h1>
<form action="enroll" method="post">
学生ID: <input type="text" name="studentId"><br>
课程ID: <input type="text" name="courseId"><br>
<input type="submit" value="选课">
</form>
</body>
</html>
EnrollServlet.java
)package com.example;
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 java.io.IOException;
@WebServlet("/enroll")
public class EnrollServlet extends HttpServlet {
private EnrollmentService enrollmentService = new EnrollmentService();
@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
String studentId = request.getParameter("studentId");
String courseId = request.getParameter("courseId");
try {
enrollmentService.enrollStudent(studentId, courseId);
response.sendRedirect("success.jsp");
} catch (Exception e) {
response.sendRedirect("error.jsp?message=" + e.getMessage());
}
}
}
对于部署JSP应用,可以考虑使用腾讯云的云服务器(CVM)和云数据库(TencentDB),它们提供了稳定可靠的基础设施,适合部署和运行Java Web应用。
希望这些信息对你有所帮助!如果有更多具体问题,欢迎继续提问。
云+社区沙龙online第6期[开源之道]
实战低代码公开课直播专栏
腾讯云培训认证中心开放日
DB TALK 技术分享会
实战低代码公开课直播专栏
T-Day
Lowcode Talk
领取专属 10元无门槛券
手把手带您无忧上云