How to implement jsp paging function

Implementation steps: 1. Introduce the JSTL tag library into the JSP page; 2. Obtain data from the database; 3. Paging the data; 4. Display the paging navigation bar in the page; 5. According to the current The page number and the number displayed on each page can be obtained from the paging data and displayed on the page.

The general steps to implement JSP paging function are as follows:

1. In the JSP page , obtain data from the database through JSTL tag library or Java code.

2. Page the data according to the paging conditions (such as the number displayed on each page, the current page number, etc.).

3. Display a paging navigation bar on the page to facilitate users to switch to different page numbers.

4. According to the current page number and the number displayed on each page, obtain the corresponding data from the paging data and display it on the page.

The specific implementation steps are as follows:

Introduce the JSTL tag library into the JSP page, for example:

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>

From the database Get the data, for example:

<c:forEach var="item" items="${data}"><tr><td>${item.id}</td><td>${item.name}</td><td>${item.age}</td></tr></c:forEach>

Perform pagination processing on the data, for example:

<%int pageSize = 10; // 每页显示数量int currentPage = request.getParameter("page") == null ? 1 : Integer.parseInt(request.getParameter("page")); // 当前页码int start = (currentPage - 1) * pageSize; // 计算起始位置List<Data> dataList = getDataFromDatabase(); // 从数据库中获取数据List<Data> pageList = dataList.subList(start, Math.min(start + pageSize, dataList.size())); // 对数据进行分页处理request.setAttribute("data", pageList); // 将分页后的数据存入request中%>

Display the paging navigation bar on the page, for example:

<ul class="pagination"><li><a href="?page=1">首页</a></li><c:forEach var="i" begin="1" end="${totalPage}"><li><a href="?page=${i}">${i}</a></li></c:forEach><li><a href="?page=${totalPage}">尾页</a></li></ul>

Among them, totalPage represents the total number of pages, which can be calculated.

According to the current page number and the number displayed on each page, obtain the corresponding data from the paging data and display it on the page, for example:

<c:forEach var="item" items="${data}">
<tr>
<td>${item.id}</td>
<<td>${item.name}</td>
<td>${item.age}</td>
</tr>
</c:forEach>

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