用javaweb编写学生信息分页查询页面

以下是使用JavaWeb编写学生信息分页查询页面的步骤： 1.创建一个JSP页面，用于显示学生信息列表和分页导航栏。 2.创建一个Servlet，用于处理分页查询请求。在Servlet中，首先获取当前页码和每页显示的记录数，然后调用Service层的方法查询学生信息列表和总记录数。最后将查询结果存储到request中，转发到JSP页面进行显示。 3.在Service层中，使用DOM4J读取XML文件，解析出学生信息列表和总记录数。然后根据当前页码和每页显示的记录数，计算出需要显示的学生信息列表和总页数。 4.在DAO层中，使用XPath表达式查询XML文件中的学生信息。 5.在JSP页面中，使用JSTL标签库和EL表达式显示学生信息列表和分页导航栏。以下是代码实现： 1. JSP页面 ```jsp <%@ 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>学生信息列表</title> </head> <body> <h1>学生信息列表</h1> <table border="1"> <tr> <th>学号</th> <th>姓名</th> <th>性别</th> <th>年龄</th> </tr> <c:forEach items="${students}" var="student"> <tr> <td>${student.id}</td> <td>${student.name}</td> <td>${student.gender}</td> <td>${student.age}</td> </tr> </c:forEach> </table> <c:if test="${totalPage > 1}"> <div> <c:choose> <c:when test="${currentPage > 1}"> <a href="student?page=${currentPage - 1}">上一页</a> </c:when> <c:otherwise> 上一页 </c:otherwise> </c:choose> <c:forEach begin="1" end="${totalPage}" var="i"> <c:choose> <c:when test="${i == currentPage}"> <span>${i}</span> </c:when> <c:otherwise> <a href="student?page=${i}">${i}</a> </c:otherwise> </c:choose> </c:forEach> <c:choose> <c:when test="${currentPage < totalPage}"> <a href="student?page=${currentPage + 1}">下一页</a> </c:when> <c:otherwise> 下一页 </c:otherwise> </c:choose> </div> </c:if> </body> </html> ``` 2. Servlet ```java @WebServlet("/student") public class StudentServlet extends HttpServlet { private static final long serialVersionUID = 1L; private StudentService studentService = new StudentServiceImpl(); protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { int page = Integer.parseInt(request.getParameter("page")); int pageSize = 10; List<Student> students = studentService.getStudentsByPage(page, pageSize); int totalPage = studentService.getTotalPage(pageSize); request.setAttribute("students", students); request.setAttribute("currentPage", page); request.setAttribute("totalPage", totalPage); request.getRequestDispatcher("student.jsp").forward(request, response); } protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doGet(request, response); } } ``` 3. Service ```java public class StudentServiceImpl implements StudentService { private static final String FILE_NAME = "students.xml"; private static final String ROOT_ELEMENT_NAME = "students"; private static final String STUDENT_ELEMENT_NAME = "student"; private static final String ID_ELEMENT_NAME = "id"; private static final String NAME_ELEMENT_NAME = "name"; private static final String GENDER_ELEMENT_NAME = "gender"; private static final String AGE_ELEMENT_NAME = "age"; @Override public List<Student> getStudentsByPage(int page, int pageSize) { List<Student> students = new ArrayList<>(); try { Document document = getDocument(); Element rootElement = document.getRootElement(); List<Element> studentElements = rootElement.elements(STUDENT_ELEMENT_NAME); int startIndex = (page - 1) * pageSize; int endIndex = Math.min(startIndex + pageSize, studentElements.size()); for (int i = startIndex; i < endIndex; i++) { Element studentElement = studentElements.get(i); int id = Integer.parseInt(studentElement.elementText(ID_ELEMENT_NAME)); String name = studentElement.elementText(NAME_ELEMENT_NAME); String gender = studentElement.elementText(GENDER_ELEMENT_NAME); int age = Integer.parseInt(studentElement.elementText(AGE_ELEMENT_NAME)); Student student = new Student(id, name, gender, age); students.add(student); } } catch (Exception e) { e.printStackTrace(); } return students; } @Override public int getTotalPage(int pageSize) { int totalPage = 0; try { Document document = getDocument(); Element rootElement = document.getRootElement(); List<Element> studentElements = rootElement.elements(STUDENT_ELEMENT_NAME); int totalRecord = studentElements.size(); totalPage = (totalRecord + pageSize - 1) / pageSize; } catch (Exception e) { e.printStackTrace(); } return totalPage; } private Document getDocument() throws Exception { SAXReader reader = new SAXReader(); Document document = reader.read(new File(FILE_NAME)); return document; } } ``` 4. DAO ```java public class StudentDaoImpl implements StudentDao { private static final String FILE_NAME = "students.xml"; private static final String ROOT_ELEMENT_NAME = "students"; private static final String STUDENT_ELEMENT_NAME = "student"; private static final String ID_ELEMENT_NAME = "id"; private static final String NAME_ELEMENT_NAME = "name"; private static final String GENDER_ELEMENT_NAME = "gender"; private static final String AGE_ELEMENT_NAME = "age"; @Override public List<Student> getAllStudents() { List<Student> students = new ArrayList<>(); try { Document document = getDocument(); Element rootElement = document.getRootElement(); List<Element> studentElements = rootElement.elements(STUDENT_ELEMENT_NAME); for (Element studentElement : studentElements) { int id = Integer.parseInt(studentElement.elementText(ID_ELEMENT_NAME)); String name = studentElement.elementText(NAME_ELEMENT_NAME); String gender = studentElement.elementText(GENDER_ELEMENT_NAME); int age = Integer.parseInt(studentElement.elementText(AGE_ELEMENT_NAME)); Student student = new Student(id, name, gender, age); students.add(student); } } catch (Exception e) { e.printStackTrace(); } return students; } private Document getDocument() throws Exception { SAXReader reader = new SAXReader(); Document document = reader.read(new File(FILE_NAME)); return document; } } ```

用javaweb编写学生信息分页查询页面

相关推荐

java 编的 学生信息查询

Java实现分页查询

JavaWeb实现分页查询案例

javaweb分页查询

用Javaweb实现分页模糊查询

javaweb 分页查询

javaweb实现mysql分页查询

javaweb 分页查询实现

基于javaweb的学生信息管理系统

学生管理系统javaweb代码编写

Javaweb编写登陆注册页面保姆级教程

基于Javaweb的学生信息管理系统的亮点

javaweb学生信息管理

不用JSP如何在javaweb实现分页查询

javaweb实现学生信息管理

基于Javaweb的学生信息管理系统设计

用javaweb编写图书管理系统

javaweb学生信息管理系统代码

用javaweb写一个学生信息管理系统

最新推荐

JavaWeb实现简单查询商品功能

javaweb_分页显示数据库内容

JavaWeb设计城市公交查询系统（报告）

BSC关键绩效财务与客户指标详解

管理建模和仿真的文件

【实战演练】俄罗斯方块：实现经典的俄罗斯方块游戏，学习方块生成和行消除逻辑。

卷积神经网络实现手势识别程序

绘制企业战略地图：从财务到客户价值的六步法

"互动学习：行动中的多样性与论文攻读经历"

【实战演练】井字棋游戏：开发井字棋游戏，重点在于AI对手的实现。

java 编的学生信息查询