<%@page import="javabean.Base"%> <%@page import="java.sql.ResultSet"%> <%@page import="java.sql.PreparedStatement"%> <%@page import="java.sql.Connection"%> <%@page import="net.sf.json.JSONObject"%> <%@page import="net.sf.json.JSONArray"%> <%@page import="javabean.Admin"%> <%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> 图书证修改 <% Connection connection = null; // 声明数据库连接对象 PreparedStatement pstmt = null; // 声明PreparedStatement对象 ResultSet ruleSet = null; // 声明ResultSet对象，用于存储查询结果 String sql = "select * from rules"; // 定义SQL查询语句 String result = ""; // 定义结果字符串 connection = (Connection)Base.getConnection(); // 获取数据库连接 pstmt = connection.prepareStatement(sql); // 创建PreparedStatement对象并执行SQL查询 ruleSet = pstmt.executeQuery(); // 执行查询并返回结果集 %>