应用：通过存储过程返回集合

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1,首先是oracle的存储过程,利用了cursor

sql 代码

CREATE OR REPLACE PROCEDURE OTAC_ADM.pro_gettasksubscriber_data (
   msg_overtime               IN       INTEGER,
   subscriber_total           IN       INTEGER,
   task_id                    IN       INTEGER,
   retry_subscriber_percent   IN       NUMBER,
   retry_num                  IN       INTEGER,
   sub_groupid                IN       INTEGER,
   p_cursor                   OUT      tasksubscriber_package.task_cursor
)
IS
   retry_task    INTEGER;
   db_retry      INTEGER;
   db_new        INTEGER;
   db_task_num   INTEGER;

BEGIN
   SELECT COUNT (1)
     INTO db_task_num
     FROM otatask t
    WHERE t.statusid = 3;

   IF db_task_num > 0
   THEN
      retry_task := subscriber_total / db_task_num * retry_subscriber_percent;
   ELSE
      RETURN;
   END IF;

   SELECT COUNT (msgid)
     INTO db_retry
     FROM otatasksubscribers
    WHERE subscriberstatusid = 2
      AND (SYSDATE - msg_overtime / (24 * 3600) - sendingdate) > 0
      AND retrynum < retry_num
      AND sendingstat = 0
      AND taskid = task_id
      AND subgroupid = sub_groupid
      AND iscanretry = 1;

   IF db_retry > retry_task
   THEN
      db_retry := retry_task;
   END IF;

   db_new := subscriber_total / db_task_num - db_retry;

   OPEN p_cursor FOR
      -- retry subscriber of a task
      SELECT *
        FROM (SELECT   msisdn, currentseq, msgid, retrynum, sendingdate,
                       subscriberstatusid, patchlastseq, patchlastcode,
                       iscanretry
                  FROM otatasksubscribers
                 WHERE subscriberstatusid = 2
                   AND (SYSDATE - msg_overtime / (24 * 3600) - sendingdate) >
                                                                             0
                   AND retrynum < retry_num
                   AND sendingstat = 0
                   AND taskid = task_id
                   AND iscanretry = 1
                   AND subgroupid = sub_groupid
              ORDER BY currentseq DESC)
       WHERE ROWNUM <= db_retry
      UNION ALL
      -- new subscriber of a task
      SELECT *
        FROM (SELECT msisdn, currentseq, msgid, retrynum, sendingdate,
                     subscriberstatusid, patchlastseq, patchlastcode,
                     iscanretry
                FROM otatasksubscribers
               WHERE subscriberstatusid = 0
                 AND taskid = task_id
                 AND subgroupid = sub_groupid
                 AND iscanretry = 1)
       WHERE ROWNUM <= db_new;
EXCEPTION
   WHEN NO_DATA_FOUND
   THEN
      NULL;
   WHEN OTHERS
   THEN
      -- Consider logging the error and then re-raise
      RAISE;
END pro_gettasksubscriber_data;
/

2.再看看java的调用

java 代码

CallableStatement proc = null;
            proc = DBConn
                    .prepareCall("{ call pro_gettasksubscriber_data(?,?,?,?,?,?,?) }");
            proc.setInt(1, Start.MessageOverTime);
            proc.setInt(2, Start.runnergroupsize);
            proc.setInt(3, taskID);
            proc.setDouble(4, Start.retry_subscriber_percent);
            proc.setInt(5, Start.RetryTimes);
            proc.setLong(6, subGroupId);
            proc.registerOutParameter(7, oracle.jdbc.OracleTypes.CURSOR);
            proc.execute();
            rs = (ResultSet) proc.getObject(7);

3，小心oracle的classes12.jar的bug会造成代码的一些问题。。。

参考

 xiaobo.iteye.com/blog/44466