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我试着做crud，用jsp和servlet，现在我想增加排序和分页，但不知道怎么做，我想在表名点击时一定要按表名排序。我在寻找解决方案，但主要是说解决方案使用json、jquery或ajax，我想知道如果我使用jstl和java本身，是否每次都会刷新整个页面。如何使用json？我的代码如下：studentsdao.java
List<StudentBean> list = new ArrayList<StudentBean>();
try {
DataHandler dh = new DataHandler();
Connection con = dh.getDBConnection();
PreparedStatement ps = con.prepareStatement(
"select * from Students limit " + (start - 1) + "," + total);
ResultSet rs = ps.executeQuery();
while (rs.next()) {
StudentBean bean = new StudentBean();
bean.setId(rs.getInt(1));
bean.setUsername(rs.getString(2));
bean.setAdpra(rs.getString(10));
list.add(bean);
}
con.close();
} catch (Exception e) {
System.out.println(e);
}
return list;
}视图.jsp
pageEncoding="ISO-8859-1" session="false" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/sql" prefix="sql"%>
<%@ taglib uri = "http://java.sun.com/jsp/jstl/functions" prefix="fn" %>
<%@page import="com.example.practice.StudentBean" %>
<%@page import="com.example.practice.StudentsDAO,com.example.practice.StudentBean.*,java.util.*" %>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Update Student Info</title>
<link rel="stylesheet" href="styles/styles.css" />
</head>
<body>
<h2>list student Info</h2>
<%
List<StudentBean> list = StudentsDAO.getAllRecords();
request.setAttribute("list", list);
%>
<table border="1" width="90%">
<tr>
<th>Id</th>
<th>Username</th>
<th>Password</th>
<th>Name</th>
<th>Surname</th>
<th>Faculty</th>
<th>Phone num</th>
<th>Admin Privilege</th>
<th>Edit</th>
<th>Delete</th>
</tr>
<c:forEach items="${list}" var="bean">
<tr>
<td>${bean.getId()}</td>
<td>${bean.getUsername()}</td>
<td>${bean.getStpass()}</td>
<td>${bean.getStname()}</td>
<td>${bean.getSurname()}</td>
<td>${bean.getFaculty()}</td>
<td>${bean.getStnum()}</td>
<td>${bean.getAdpra()}</td>
<td><a href="edit.jsp?id=${bean.getId()}">Edit</a></td>
<td><a href="delete.jsp?id=${bean.getId()}">Delete</a></td>
</tr>
</c:forEach>
</table>
</body>
1条答案
按热度按时间mw3dktmi1#
"select * from Students limit " + (start - 1) + "," + total);甲骨文没有limit子句，但有另一行限制子句：所以你需要重写如下：
示例：https://oracle-base.com/articles/12c/row-limiting-clause-for-top-n-queries-12cr1