使用Future接口進行多線程報表查詢

報表查詢中，可能涉及過多業務，在sql優化以後，仍然存在查詢過慢，導致串行查詢不適用情況，引入Future接口進行多線程查詢，實現快速生成報表；

主線程類：

//利用多線程查詢數據
            ThreadPoolExecutor threadPool = ImportDataThreadPoolUtil.getInstance();
            //期初數
            ReportCallable startPc = new ReportCallable(startSqlQuery);//期初數
            FutureTask<List<Object[]>> startFt = new FutureTask<List<Object[]>>(startPc);//期初任務
            threadPool.execute(startFt);
            //期末數
            ReportCallable endPc = new ReportCallable(endSqlQuery);//期末數
            FutureTask<List<Object[]>> endFt = new FutureTask<List<Object[]>>(endPc);//期末任務
            threadPool.execute(endFt);
            //放款數
            ReportCallable disbursementPc = new ReportCallable(disbursementSqlQuery);//放款數據
            FutureTask<List<Object[]>> disbursementFt = new FutureTask<List<Object[]>>(disbursementPc);//放款數據
            threadPool.execute(disbursementFt);
            //回收數
            ReportCallable receivePc = new ReportCallable(receiveSqlQuery);//回收數據
            FutureTask<List<Object[]>> receiveFt = new FutureTask<List<Object[]>>(receivePc);//回收數據
            threadPool.execute(receiveFt);
            //逾期數
            ReportCallable overduePc = new ReportCallable(overdueSqlQuery);//逾期數據
            FutureTask<List<Object[]>> overdueFt = new FutureTask<List<Object[]>>(overduePc);//逾期任務
            threadPool.execute(overdueFt);
            // 日均數
            ReportCallable avgAmountPc = new ReportCallable(avgSqlQuery);//日均數據
            FutureTask<List<Object[]>> avgAmountFt = new FutureTask<List<Object[]>>(avgAmountPc);//日均任務
            threadPool.execute(avgAmountFt);
            //逾期剩餘數
            ReportCallable overdueLeftPc = new ReportCallable(overdueLeftSqlQuery);//逾期剩餘金額
            FutureTask<List<Object[]>> overdueLeftFt = new FutureTask<List<Object[]>>(overdueLeftPc);//日均任務
            threadPool.execute(overdueLeftFt);
            List<Object[]> startList = null;//期初數
            List<Object[]> endList = null;//期末數
            List<Object[]> disbursementList = null;//放款數
            List<Object[]> receiveList = null;//回收數據
            List<Object[]> overdueList = null;//逾期數據
            List<Object[]> avgPrincipalAmountList = null;//日均
            List<Object[]> overdueLeftList = null;//逾期剩餘
            //增加過期時間房/防止死循環
            Long userTime = 0l;
            while (true && userTime < 1800) {
                if (startFt.isDone() && endFt.isDone() && disbursementFt.isDone()
                        && receiveFt.isDone() && overdueFt.isDone() && avgAmountFt.isDone()
                        && overdueLeftFt.isDone()) {
                    break;
                }
                startList = startFt.get();//期初數
                endList = endFt.get();//期末數
                disbursementList = disbursementFt.get();//放款數據
                receiveList = receiveFt.get();//回收哦數據
                overdueList = overdueFt.get();//逾期數據
                overdueLeftList = overdueLeftFt.get();//逾期剩餘
                avgPrincipalAmountList = avgAmountFt.get();//日均
                Thread.sleep(1000);//線程鎖定(1s)
                userTime++;
            }

接口實現：

public class ReportCallable implements Callable<List<Object[]>> {
    private SQLQuery sqlQuery;

    public ReportCallable(SQLQuery sqlQuery) {
        this.sqlQuery = sqlQuery;
    }

    public List<Object[]> call() throws Exception {
        return  (List<Object[]>)sqlQuery.list();
    }
}