java多线程数据分页处理实例讲解

int pageSize = 100;
int currentPageLength = 0;
int pageIndex = 0;
ExecutorService exe = newFixedThreadPool(Runtime.getRuntime().availableProcessors());
do {
  int offset = pageIndex * pageSize;
  List<TradeInfo> tradeInfos = tradeInfoService.findTradeInfoBysPage(queryParams,offset,pageSize);
  if (null != tradeInfos && tradeInfos.size() > 0) {
    currentPageLength = tradeInfos.size();
    TradeInfoProcesserTask task = new TradeInfoProcesserTask(tradeInfos );
    exe.execute(task);
    pageIndex++;
  }else{
    System.out.println("Page Query TradeInfo Got NOTHING! Break query loop!");
    break;
  }
} while (currentPageLength == pageSize);
exe.shutdown();
while(true) {
  if(exe.isTerminated()){
    doOtherThings();
    System.out.println("分页式多线程处理数据完毕！");
    break;
  }
}

public class TradeInfoProcesserTask implements Runnable{
  private volatile List<TradeInfo> tradeInfos;
   
  public TradeInfoProcesserTask (List<TradeInfo> _tradeInfos){
    tradeInfos = _tradeInfos;
  }
   
  @Override
  public void run() {
    processTradeInfos();
  }
   
  private void processTradeInfos(){
    //do something with tradeInfos .....
  }
}