java 多線程--分頁處理

    public void add() {
        ExecutorService executor = newFixedThreadPool(3);
        //?代表開啓全部線程的數量
        // 判斷可是線程池可以結束
        int pageSize = 10000;
        int pageIndex = 1;
        do {
            int start = (pageIndex - 1) * pageIndex;
            int end = pageSize * pageIndex;
            executor.execute(new DoAdd(start, end));
            pageIndex ++;

        } while (pageIndex <10);
        System.out.println("pageIndex--" + pageIndex);
        executor.shutdown();
        //等待所有任務都結束了繼續執行
        while(true){
            try {
                if(executor.isTerminated()){
                    System.out.println("所有的子線程都結束了！");
                    break;
                }
                Thread.sleep(1000);
            }catch (Exception e){
                e.printStackTrace();
            }
        }

    }

    private class DoAdd implements Runnable {

        private int index;
        private int page;

        public DoAdd(int index, int page) {
            this.index = index;
            this.page = page;
        }

        @Override
        public void run() {
            for (int i = index; i < page; i++) {
               //todo something

            }
        }
    }