JSP+Servlet实现学生信息条件查询和分页功能

首先，需要创建一个学生实体类来表示学生信息，包含学生的学号、姓名、性别、专业等属性。\n\njava\npublic class Student {\n private String studentId;\n private String name;\n private String gender;\n private String major;\n\n // getters and setters\n}\n\n\n接下来，创建一个学生管理的Servlet，来处理学生管理页面的请求。\n\njava\n@WebServlet("/student")\npublic class StudentServlet extends HttpServlet {\n private static final int PAGE_SIZE = 10; // 每页显示的学生数量\n\n protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {\n String action = request.getParameter("action");\n\n if (action == null || action.isEmpty()) {\n // 默认显示第一页的学生信息\n int currentPage = 1;\n displayStudents(request, response, currentPage);\n } else if (action.equals("search")) {\n // 根据条件查询学生信息\n String name = request.getParameter("name");\n searchStudents(request, response, name);\n } \n }\n\n protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {\n doGet(request, response);\n }\n\n // 分页显示学生信息\n private void displayStudents(HttpServletRequest request, HttpServletResponse response, int currentPage) throws ServletException, IOException {\n // 查询学生总数\n int totalStudents = StudentDAO.getTotalStudents();\n\n // 计算总页数\n int totalPages = (int) Math.ceil((double) totalStudents / PAGE_SIZE);\n\n // 根据当前页码和每页显示的学生数量查询学生列表\n List<Student> students = StudentDAO.getStudents(currentPage, PAGE_SIZE);\n\n // 将查询到的学生列表、总页数和当前页码放入request中\n request.setAttribute("students", students);\n request.setAttribute("totalPages", totalPages);\n request.setAttribute("currentPage", currentPage);\n\n // 转发到学生管理页面\n request.getRequestDispatcher("student.jsp").forward(request, response);\n }\n\n // 根据姓名模糊查询学生信息\n private void searchStudents(HttpServletRequest request, HttpServletResponse response, String name) throws ServletException, IOException {\n // 查询符合条件的学生列表\n List<Student> students = StudentDAO.getStudentsByName(name);\n\n // 将查询到的学生列表放入request中\n request.setAttribute("students", students);\n\n // 转发到学生管理页面\n request.getRequestDispatcher("student.jsp").forward(request, response);\n }\n}\n\n\n在学生管理页面（student.jsp）中，可以通过表单进行条件查询和翻页操作。\n\njsp\n<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8" %>\n<!DOCTYPE html>\n<html>\n<head>\n <meta charset="UTF-8">\n <title>学生管理</title>\n</head>\n<body>\n <h1>学生管理</h1>\n\n <form action="student" method="get">\n <input type="hidden" name="action" value="search">\n <label for="name">姓名：</label>\n <input type="text" name="name">\n <input type="submit" value="查询">\n </form>\n\n <table>\n <tr>\n <th>学号</th>\n <th>姓名</th>\n <th>性别</th>\n <th>专业</th>\n </tr>\n <c:forEach var="student" items="${students}">\n <tr>\n <td>${student.studentId}</td>\n <td>${student.name}</td>\n <td>${student.gender}</td>\n <td>${student.major}</td>\n </tr>\n </c:forEach>\n </table>\n\n <div>\n <c:choose>\n <c:when test="${currentPage > 1}">\n <a href="student?action=display&page=${currentPage - 1}">上一页</a>\n </c:when>\n <c:otherwise>\n 上一页\n </c:otherwise>\n </c:choose>\n\n 第<c:out value="${currentPage}"/>页 / 共<c:out value="${totalPages}"/>页\n\n <c:choose>\n <c:when test="${currentPage < totalPages}">\n <a href="student?action=display&page=${currentPage + 1}">下一页</a>\n </c:when>\n <c:otherwise>\n 下一页\n </c:otherwise>\n </c:choose>\n </div>\n</body>\n</html>\n\n\n在数据库层（StudentDAO）中，实现相应的数据库查询操作。\n\njava\npublic class StudentDAO {\n public static int getTotalStudents() {\n // 查询学生总数的SQL语句\n String sql = "SELECT COUNT(*) FROM student";\n\n // 执行查询操作，返回学生总数\n // ...\n }\n\n public static List<Student> getStudents(int currentPage, int pageSize) {\n // 根据当前页码和每页显示的学生数量查询学生列表的SQL语句\n String sql = "SELECT * FROM student ORDER BY student_id ASC LIMIT ?, ?";\n\n // 执行查询操作，返回学生列表\n // ...\n }\n\n public static List<Student> getStudentsByName(String name) {\n // 根据姓名模糊查询学生列表的SQL语句\n String sql = "SELECT * FROM student WHERE name LIKE ? ORDER BY student_id ASC";\n\n // 执行查询操作，返回学生列表\n // ...\n }\n}\n\n\n以上就是使用JSP和Servlet实现根据条件查询学生信息的功能的基本步骤。具体的数据库操作和分页逻辑需要根据实际情况进行实现。