slideshow.jsp
资源名称:Ajax.rar [点击查看]
上传用户:shjgzm
上传日期:2017-08-31
资源大小:2757k
文件大小:2k
源码类别:
Ajax
开发平台:
Java
- <%@ page contentType="text/plain; charset=UTF-8"%>
- <%@ page language="java"%>
- <%@ page import="java.sql.*,ajax.db.DBUtils"%>
- <%
- out.clear(); //清空当前的输出内容(空格和换行符)
- String sql = "select * from album"; //定义查询数据库的SQL语句
- StringBuffer picInfo = new StringBuffer("["); //保存查询结果
- int counter = 0; //计数器
- Connection conn = null; //声明Connection对象
- PreparedStatement pstmt = null; //声明PreparedStatement对象
- ResultSet rs = null; //声明ResultSet对象
- try {
- conn = DBUtils.getConnection(); //获取数据库连接
- pstmt = conn.prepareStatement(sql); //根据sql创建PreparedStatement
- rs = pstmt.executeQuery(); //执行查询,返回结果集
- //遍历结果集,生成JSON格式的查询结果
- while (rs.next()) {
- if (counter > 0) {
- picInfo.append(",");
- }
- picInfo.append("{");
- picInfo.append("'id':'");
- picInfo.append(rs.getString("id"));
- picInfo.append("','name':'");
- picInfo.append(rs.getString("name"));
- picInfo.append("','width':'");
- picInfo.append(rs.getString("width"));
- picInfo.append("','height':'");
- picInfo.append(rs.getString("height"));
- picInfo.append("'}");
- counter++; //计数器加1
- }
- } catch (SQLException e) {
- System.out.println(e.toString());
- } finally {
- DBUtils.close(rs); //关闭结果集
- DBUtils.close(pstmt); //关闭PreparedStatement
- DBUtils.close(conn); //关闭连接
- }
- picInfo.append("]");
- out.print(picInfo.toString()); //返回查询结果
- %>