select GUID,车次编码,车次类型，座位类型，车厢号码，座位编码，座位位置,车票版本号 from 订票表
where  座位标识=~（（~坐标标识）|000111111111111000）
and 发车日期='2016-06-11'
and 车次编码='G71'
and 始发受限车站=始发受限车站|000100000000000000
and 终到受限车站=终到受限车站|000000000000001000
and 车次类型='二等座'
and 座位位置='F'and 受限渠道=2|受限渠道order by 余票数量 asc ,车厢 asc  --先卖余票少的，防止打乱更多的长途票

update 订票表 set 座位标识=座位标识 | 000111111111111000,车票版本号=车票版本号+1,余票数量 = 余票数量-（15-3）where GUID = Md5(车次+座位编码+发车日期) and 座位标识=~（（~坐标标识）|000111111111111000）--乐观锁根据更新结果是否为1则可以判定购票成功

update 订票表 set 座位标识=座位标识 ^000111111111111000,余票数量 = 余票数量+（15-3）,车票版本号=车票版本号+1 where GUID = Md5(车次+座位编码+发车日期)  and 车票版本号=取得的版本号 --乐观锁

根据返回结果为1则标识退票成功

  1 import java.math.BigDecimal;2 3 public class MainTest {4     public static void main(String[] args) {5         String ticketFlag = "100000000000000000";6         int beginStation = 3;7         int endStation = 15;8         long beginTime = System.currentTimeMillis();9         String result = orderTicket(ticketFlag, beginStation, endStation);10         if (result.equals(ticketFlag)) {11             System.out.println("订票失败");12         } else {13             System.out.println("订票后的结果：" + result);14             // 如果要取消的话，就进行这个操作15             String b = buildTicket(ticketFlag.length(), beginStation,16                     endStation);17             System.out.println("释放后的结果：" + releaseTicket(ticketFlag, b));18 19         }20         long endTime = System.currentTimeMillis();21         System.out.println("耗时：" + (endTime - beginTime));22     }23 24     /**25      * 订票26      * 27      * @param ticketFlag28      * @param beginStation29      * @param endStation30      * @return31      */32     private static String orderTicket(String ticketFlag, int beginStation,33             int endStation) {34         String result = "";35         if (checkCanTicket(ticketFlag, beginStation, endStation)) {36             String b = buildTicket(ticketFlag.length(), beginStation,37                     endStation);38 39             String currentTicked = toTicket(ticketFlag, b);40             System.out.println("预占票前结果：" + ticketFlag);41             result = currentTicked;42         } else {43             result = ticketFlag;44         }45         ;46         return result;47     }48 49     /**50      * 取消已定票51      * 52      * @param ticketFlag53      * @param b54      * @return55      */56     private static String releaseTicket(String ticketFlag, String b) {57         StringBuilder tempSt = new StringBuilder("");58         int length = ticketFlag.length();59         for (int i = 0; i < length; i++) {60             char tempA = ticketFlag.charAt(i);61             char tempB = b.charAt(i);62             if (tempA == '1' && tempB == '1') {63                 tempSt.append("0");64             } else {65                 tempSt.append(tempA);66             }67         }68         return tempSt.toString();69     }70 71     /**72      * 创建区间占位票73      * 74      * @param length75      * @param beginStation76      * @param endStation77      * @return78      */79     private static String buildTicket(int length, int beginStation,80             int endStation) {81         StringBuilder st = new StringBuilder("");82         for (int i = 0; i < length; i++) {83             if (i >= beginStation && i < endStation) {84                 st.append("1");85             } else {86                 st.append("0");87             }88         }89         System.out.println("创建区间票：" + st.toString());90         return st.toString();91     }92 93     /**94      * 生成订票后的结果95      * 96      * @param ticketFlag97      * @param b98      * @return99      */
100     private static String toTicket(String ticketFlag, String b) {
101         StringBuilder tempSt = new StringBuilder("");
102         int length = ticketFlag.length();
103         for (int i = 0; i < length; i++) {
104             char tempA = ticketFlag.charAt(i);
105             char tempB = b.charAt(i);
106             if (tempA == '1' || tempB == '1') {
107                 tempSt.append("1");
108             } else {
109                 tempSt.append(tempA);
110             }
111         }
112         return tempSt.toString();
113     }
114
115     /**
116      * 是否可以订票
117      *
118      * @param ticketFlag
119      * @param beginStation
120      * @param endStation
121      * @return
122      */
123     private static boolean checkCanTicket(String ticketFlag, int beginStation,
124             int endStation) {
125         boolean result = false;
126         String tempTicket = ticketFlag.substring(beginStation, endStation);
127         BigDecimal b = new BigDecimal(tempTicket);
128         if (b.equals(new BigDecimal("0"))) {
129             result = true;
130         }
131         return result;
132     }
133
134 }