overuse.java~17~

来自「一个java+sql2000开发的网吧管理系统」· JAVA~17~ 代码 · 共 78 行

package com.jbaptech.accp.netbar.client;

import java.sql.*;
/**
 * <p>Title: </p>
 *
 * <p>Description: </p>
 *
 * <p>Copyright: Copyright (c) 2005</p>
 *
 * <p>Company: 北京阿博泰克北大青鸟信息技术有限公司</p>
 *
 * @author Michael Luo
 * @version 1.0
 */
public class OverUse {
  public OverUse() {
  }

//获取上机时间
  public String getBeginTime(String ComputerId){
   String BeginTime="";
    try{
      Connection con = ConnectionManager.getConnection();
      String sql = "select BeginTime from Record where ComputerId ='"+ComputerId+"'";
      Statement s =con.createStatement();
      ResultSet rs = s.executeQuery(sql);
      while(rs.next()){
        BeginTime = rs.getString(1);
      }
    }catch (SQLException ce){
      ce.printStackTrace();
    }
    return BeginTime;
  }



  public void update(String ComputerId,String EndTime,int fee){


    Connection con =ConnectionManager.getConnection();

    try{
      String sql
          = "update Record set EndTime = ?,Fee = ? where ComputerId ='"+ComputerId+"'";
      PreparedStatement ps = con.prepareStatement(sql);
      ps.setString(1,EndTime);
      ps.setInt(2,fee);
      ps.executeUpdate();

      String sql2 =
          "update computer set OnUse = \'0\' where id ='"+ComputerId+"'";
      Statement s = con.createStatement();
      s.executeUpdate(sql2);

      con.close();
    }catch (SQLException ce){
      ce.printStackTrace();

    }
  }

  public void update(String CardId,int fee){

    try{
      Connection con =ConnectionManager.getConnection();
      String sql3 =
          "update Card set balance=balance-'" + fee + "' where id ='" +
          CardId + "'";
      Statement ps2 = con.createStatement();
      ps2.executeUpdate(sql3);
    }catch (SQLException ce){
      ce.printStackTrace();
    }
  }
}