parameter.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/html; 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 id = request.getParameter("id"); //获取产品id
- StringBuffer params = new StringBuffer("{"); //用于保存产品信息(JSON格式)
- String sql = "select type, network, color, saleyear, ring, screen from mobiles where id = ?";//定义查询数据库的SQL语句
- 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
- pstmt.setString(1, id); //设置参数
- rs = pstmt.executeQuery(); //执行查询,返回结果集
- //通过ResultSetMetaData自动获取字段名称,作为JSON名值对中的名称部分
- ResultSetMetaData meta = rs.getMetaData();
- int count = meta.getColumnCount();
- if (rs.next()) {
- for (int i = 0; i < count; i++) {
- if (i > 0) {
- params.append(",");
- }
- params.append("'");
- params.append(meta.getColumnLabel(i + 1));
- params.append("':'");
- params.append(rs.getString(i + 1));
- params.append("'");
- }
- }
- } 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
- }
- params.append("}");
- out.print(params.toString());
- %>