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Java多線程執(zhí)行處理業(yè)務(wù)時間太久解決方法代碼示例

背景：在政府開發(fā)了一個應(yīng)用系統(tǒng)，主要功能是讓企業(yè)填寫企業(yè)資質(zhì)信息，然后通過給定的公式，統(tǒng)計這一系列的信息，以得分的形式展示給政府領(lǐng)導(dǎo)查看。目前有1300家企業(yè)填報。由于得分是實時顯示的，所以導(dǎo)致統(tǒng)計功能很慢。

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代碼運行流程：

1、查出1300企業(yè)信息

2、遍歷1300企業(yè)信息，ji計算每家企業(yè)得分信息。每家預(yù)計時間為0.3秒。合計390秒。導(dǎo)致頁面請求超時

3、導(dǎo)出(用jxl jar)

解決方案：

由于處理業(yè)務(wù)的，所以需要能有返回值的線程。用：Callable

直接上代碼

1、調(diào)用線程的代碼

List<Map<String,Object>> list = (List<Map<String, Object>>) map.get("rows");
int taskSize = 20;
// 創(chuàng)建一個線程池
ExecutorService pool = Executors.newFixedThreadPool(taskSize);
// 創(chuàng)建多個有返回值的任務(wù) 
List<Future> listFuture = new ArrayList<Future>();
for (int i = 0; i < taskSize; i++) {
	System.out.println("我啟用多線程啦啦啦");
	int evgCount = list.size()/taskSize;
	Callable c = new MyCallable(list.subList(evgCount*i, evgCount*(i+1)),session,staticFlag,
	declareService,declareMasterService,enterpriseQueryService);
	// 執(zhí)行任務(wù)并獲取Future對象
	Future f = pool.submit(c);
	listFuture.add(f);
}
pool.shutdown();
// 獲取所有并發(fā)任務(wù)的運行結(jié)果 
List<Map<String, Object>> listResult = new ArrayList<Map<String, Object>>();
for (Future f : listFuture) {
	List<Map<String, Object>> listModel = new ArrayList<Map<String, Object>>();
	try {
		listModel = (List<Map<String, Object>>) f.get();
	}
	catch (InterruptedException e) {
		e.printStackTrace();
	}
	catch (ExecutionException e) {
		e.printStackTrace();
	}
	listResult.addAll(listModel);
}
map.put("rows", listResult);

2、線程的代碼

package usi.jszx.controller;
import java.util.List;
import java.util.Map;
import java.util.concurrent.Callable;
import javax.servlet.http.HttpSession;
import org.apache.commons.lang3.StringUtils;
import usi.jszx.entity.ScoreMain;
import usi.jszx.service.DeclareMasterService;
import usi.jszx.service.DeclareService;
import usi.jszx.service.EnterpriseQueryService;
import usi.sys.dto.AuthInfo;
import usi.sys.util.ConstantUtil;
class MyCallable implements Callable<Object> {
	//-----------------以下為線程調(diào)用的方法----------------
	private List<Map<String,Object>> list;
	private HttpSession session;
	private String staticFlag;
	private DeclareService declareService;
	private DeclareMasterService declareMasterService;
	private EnterpriseQueryService enterpriseQueryService;
	public MyCallable(List<Map<String,Object>> list,HttpSession session,String staticFlag,
	DeclareService declareService,DeclareMasterService declareMasterService,EnterpriseQueryService enterpriseQueryService) {
		this.list = list;
		this.session = session;
		this.staticFlag = staticFlag;
		this.declareService = declareService;
		this.declareMasterService = declareMasterService;
		this.enterpriseQueryService = enterpriseQueryService;
	}
	@Override
	public Object call() throws Exception {
		AuthInfo info = (AuthInfo)session.getAttribute(ConstantUtil.AUTH_INFO);
		for (int i = 0; i < list.size(); i++) {
			Map<String,Object> maplist = list.get(i);
			String mainId= maplist.get("ID")+"";
			this.gradeMaster(session, mainId, maplist.get("orgId")+"",declareMasterService,enterpriseQueryService);
			List<Map<String,Object>> listscore = declareMasterService.queryScoreMain(maplist.get("ID")+"",info.getRightType(), "report");
			// declareMasterService.queryScoreMain(mainId,info.getRightType(),isreport);
			int isdouble = 1;
			if(listscore.size()>30){
				maplist.put("SOCRETOTAL", listscore.get(46).get("SCORE"));
				isdouble = 2;
			} else if(listscore.size()>22){
				maplist.put("SOCRETOTAL", listscore.get(23).get("SCORE"));
			}
			if("3".equals(staticFlag)){
				for (int j = 0; j < 23; j++) {
					if(j<9){
						maplist.put("VALUE0"+(j+1), listscore.get(j*isdouble).get("SHOW_VALUE"));
					} else{
						maplist.put("VALUE"+(j+1), listscore.get(j*isdouble).get("SHOW_VALUE"));
					}
				}
			}
			//地市展示
			String COUNTYID = maplist.get("COUNTYID")+"";
			if("340826".equals(COUNTYID)||"341822".equals(COUNTYID)){
				maplist.put("CITYNAME",maplist.get("COUNTYNAME")+"");
			}
			//企業(yè)類型
			String DECLARE_EVALUATE = maplist.get("DECLARE_EVALUATE")+"";
			if("1".equals(DECLARE_EVALUATE)){
				maplist.put("DECLARE_EVALUATE_NAME","申報");
			} else{
				maplist.put("DECLARE_EVALUATE_NAME","評價");
			}
			//審核狀態(tài)
			String SHSTATUS = maplist.get("SHSTATUS")+"";
			if("9".equals(SHSTATUS)){
				maplist.put("STRSHSTATUS", "草稿");
			} else if("0".equals(SHSTATUS)){
				maplist.put("STRSHSTATUS", "企業(yè)提交");
			} else if("1".equals(SHSTATUS)){
				maplist.put("STRSHSTATUS", "市審核通過");
			} else if("2".equals(SHSTATUS)){
				maplist.put("STRSHSTATUS", "市審核不通過");
			} else if("3".equals(SHSTATUS)){
				maplist.put("STRSHSTATUS", "省審核通過");
			} else if("4".equals(SHSTATUS)){
				maplist.put("STRSHSTATUS", "省審核不通過");
			} else if("5".equals(SHSTATUS)){
				maplist.put("STRSHSTATUS", "省級審核中");
			} else if("6".equals(SHSTATUS)){
				maplist.put("STRSHSTATUS", "退回企業(yè)修改");
			} else if("7".equals(SHSTATUS)){
				maplist.put("STRSHSTATUS", "市級審核中");
			} else if("11".equals(SHSTATUS)){
				maplist.put("STRSHSTATUS", "修改為申報");
			} else if("12".equals(SHSTATUS)){
				maplist.put("STRSHSTATUS", "修改為評價");
			}
			if("1".equals(staticFlag)){
				//添加修改意見
				List<Map<String, Object>> listDetail = declareService.queryAuditLog(mainId);
				if(listDetail.size()>0){
					String AUDIT_OPINION = listDetail.get(0).get("AUDIT_OPINION")+"";
					if(!StringUtils.isEmpty(AUDIT_OPINION)&&!"null".equals(AUDIT_OPINION)){
						maplist.put("AUDIT_OPINION", AUDIT_OPINION);
					} else{
						maplist.put("AUDIT_OPINION", "");
					}
				}
				//是否更名 曾用名
				String ORGNAME = maplist.get("ORGNAME")+"";
				String PJNAME = maplist.get("PJNAME")+"";
				if(StringUtils.isEmpty(PJNAME)||"null".equals(PJNAME)
				||PJNAME.equals(ORGNAME)){
					maplist.put("ISGENGMING", "否");
					maplist.put("PJNAME_E", "");
				} else{
					maplist.put("ISGENGMING", "是");
					maplist.put("PJNAME_E", PJNAME);
				}
			} else if("2".equals(staticFlag)){
			}
		}
		return list;
	}
	public float gradeMaster(HttpSession session,String mainId,String orgId,
	DeclareMasterService declareMasterService,EnterpriseQueryService enterpriseQueryService) {
		AuthInfo info = (AuthInfo)session.getAttribute(ConstantUtil.AUTH_INFO);
		String rightType=info.getRightType();
		declareMasterService.deleteScoreMain(mainId);
		float[] resultFirst = new float[100];
		/*
* 先查詢所有 附表列表
* 查看得分的地方，是直接查找主表數(shù)據(jù)的
* 
* 既然審核了，主表數(shù)據(jù)肯定存起來了
* */
		List<Map<String,Object>> listDetail = declareMasterService.queryTaskDetail(mainId);
		if("2".equals(rightType)||"3".equals(rightType)){
			//將String 轉(zhuǎn)為 float
			for (int i = 0; i < listDetail.size(); i++) {
				Map<String,Object> map = listDetail.get(i);
				if(StringUtils.isEmpty(map.get("DECLARE_CITY_VALUE")+"")
				||"null".equals(map.get("DECLARE_CITY_VALUE")+"")){
					resultFirst[i]=0f;
				} else{
					resultFirst[i] = float.parsefloat(map.get("DECLARE_CITY_VALUE")+"");
				}
			}
		} else{
			//將String 轉(zhuǎn)為 float
			for (int i = 0; i < listDetail.size(); i++) {
				Map<String,Object> map = listDetail.get(i);
				if(StringUtils.isEmpty(map.get("DECLARE_PROVINCE_VALUE")+"")
				||"null".equals(map.get("DECLARE_PROVINCE_VALUE")+"")){
					resultFirst[i]=0f;
				} else{
					resultFirst[i] = float.parsefloat(map.get("DECLARE_PROVINCE_VALUE")+"");
				}
			}
		}
		Map<String,Object> enterprise= enterpriseQueryService.getInfoByOrgId(orgId).get(0);
		//根據(jù) 安徽省企業(yè)技術(shù)中心評價指標(biāo)計算公式 進(jìn)行算值 下一步算分
		float ratio1 = 0f;
		float ratio2 = 0f;
		float ratio3 = 0f;
		try {
			ratio1 = float.parsefloat(enterprise.get("RATIO1")+"");
			ratio2 = float.parsefloat(enterprise.get("RATIO2")+"");
			ratio3 = float.parsefloat(enterprise.get("RATIO3")+"");
		}
		catch (Exception e) {
		}
		Map<String,Object> map = DeclareController.getValue(resultFirst,ratio1,ratio2,ratio3);
		float[] resultValue = (float[]) map.get("resultValue");
		float[] resultScoreValue = (float[]) map.get("resultScoreValue");
		float[] resultScore = DeclareController.getScore(resultScoreValue);
		float scoreTotal = 0f;
		List<Map<String,Object>> listScore = declareMasterService.queryScoreDic();
		for (int i = 0; i < listScore.size(); i++) {
			ScoreMain scoreMain = new ScoreMain();
			scoreMain.setMainId(mainId);
			scoreMain.setScoreName(listScore.get(i).get("SCORE_NAME")+"");
			scoreMain.setScoreUnit(listScore.get(i).get("SCORE_UNIT")+"");
			scoreMain.setScoreWeight(listScore.get(i).get("SCORE_WEIGHT")+"");
			scoreMain.setDisOrder(listScore.get(i).get("DIS_ORDER")+"");
			scoreMain.setShowValue(resultValue[i]+"");
			scoreMain.setScoreValue(resultScoreValue[i]+"");
			scoreMain.setScore(resultScore[i]+"");
			declareMasterService.inserScoreMain(scoreMain);
			scoreTotal +=resultScore[i];
		}
		return scoreTotal;
	}
}

說明：MyCallable僅僅是業(yè)務(wù)處理方式繁雜。可忽略，最后從390秒提速致40秒。

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