java多线程操作mysql数据库使用cpu过高怎么解决？

public void saveAllSaleDetail(List<?> list) throws Exception {

		Map<String, SaleDetailEntity> saleDetails = new HashMap<String, SaleDetailEntity>();

		int batchSize=1000,   

			threadCounts=10; 

		if(list.size() >= batchSize){

			ExecutorService exec=Executors.newCachedThreadPool();

			List<Callable<Map<String, SaleDetailEntity>>> callList=new ArrayList<Callable<Map<String, SaleDetailEntity>>>();

			int len=list.size()/threadCounts;

			if(len==0){    

		           threadCounts=list.size();

		           len=list.size()/threadCounts;

            }

			for(int i=0;i<threadCounts;i++){  

				 final List<SaleDetailEntity> subList;

				 if(i==threadCounts-1){    

			            subList=(List<SaleDetailEntity>) list.subList(i*len,list.size());    

			   }else{    

			            subList=(List<SaleDetailEntity>) list.subList(i*len, len*(i+1)>list.size()?list.size():len*(i+1));  

		        }

				    callList.add(new Callable<Map<String, SaleDetailEntity>>(){

					@Override

					public Map<String, SaleDetailEntity> call() throws Exception {

						 Map<String, SaleDetailEntity> saleDetails = new HashMap<String, SaleDetailEntity>();

						 for (SaleDetailEntity saleDetail : subList) {

							    SaleDetailEntity sale = new SaleDetailEntity();

								sale.setOrgId(saleDetail.getOrgId());

								sale.setOwnerId(saleDetail.getOwnerId());

								sale.setProofId(saleDetail.getProofId());

								sale.setProofLines(saleDetail.getProofLines());

								List<SaleDetailEntity> saleDetailList = saleDetailDao.selectAllSaleDetailList(sale);

								if (saleDetailList != null && saleDetailList.size() > 0) {

									SaleDetailEntity saleDetailEntity = saleDetailList.get(0);

									String id = saleDetailEntity.getId();

									saleDetail.setId(id);

									saleDetailDao.updateSaleDetail(saleDetail);

								} else {

									String uuid = RandomParamUtil.getUuid();

									saleDetail.setId(uuid);

									saleDetails.put(saleDetail.getProofId(), saleDetail);

								}

						 

						 }

						return saleDetails;

					}

				 });

			}

			List<Future<Map<String,SaleDetailEntity>>> invokeAll = exec.invokeAll(callList);

			exec.shutdown();

			for (Future<Map<String, SaleDetailEntity>> future : invokeAll) {

				Map<String, SaleDetailEntity> map = future.get();

				 if(!map.isEmpty()){

					 saleDetailDao.insertAllSaleDetail(map);

				 }

			}

			

		}else{

			for (Object object : list) {

				SaleDetailEntity saleDetail = (SaleDetailEntity) object;

				// 判断是否为重复数据，是直接修改

				SaleDetailEntity sale = new SaleDetailEntity();

				sale.setOrgId(saleDetail.getOrgId());

				sale.setOwnerId(saleDetail.getOwnerId());

				sale.setProofId(saleDetail.getProofId());

				sale.setProofLines(saleDetail.getProofLines());

				List<SaleDetailEntity> saleDetailList = saleDetailDao.selectAllSaleDetailList(sale);

				if (saleDetailList != null && saleDetailList.size() > 0) {

					SaleDetailEntity saleDetailEntity = saleDetailList.get(0);

					String id = saleDetailEntity.getId();

					saleDetail.setId(id);

					saleDetailDao.updateSaleDetail(saleDetail);

				} else {

					String uuid = RandomParamUtil.getUuid();

					saleDetail.setId(uuid);

					saleDetails.put(saleDetail.getProofId(), saleDetail);

				}

			}

			if (saleDetails != null && saleDetails.size() > 0) {

				saleDetailDao.insertAllSaleDetail(saleDetails);

			}

			

		}

		

		

		try {

			//sendMCSP((List<SaleDetailEntity>)list);

		} catch (Exception e) {

			logger.error(e);

		}	 

	}