线程池处理集合

		List<TomEmp> empList =  tomEmpMapper.selectAllEmp();
        logger.info("开始循环人员集合");
        int threadSize = 1000;//每1000条数据开启一个线程
        int remainder = empList.size()%threadSize;
        int threadNum  = 0;//线程数
        if(remainder == 0){
            threadNum  = empList.size()/threadSize;
        } else {
            threadNum  = empList.size()/threadSize + 1;
        }
        ExecutorService eService = Executors.newFixedThreadPool(threadNum );//创建一个线程池
        List<Callable<List<StudentStatistics>>> cList = new ArrayList<>(); 
        Callable<List<StudentStatistics>> task = null;
        List<TomEmp> sList = null;
        
        for(int i=0;i<threadNum;i++){
            if(i == threadNum - 1){
                sList = empList.subList(i*threadSize, empList.size());
            } else {
                sList = empList.subList(i*threadSize, (i+1)*threadSize);
            }
            final List<TomEmp> nowList = sList;
            task = new Callable<List<StudentStatistics>>() {
                @Override
                public List<StudentStatistics> call() throws Exception {
                    List<StudentStatistics>  studentStaticList =new ArrayList<>();
                    studentStaticList=convertData(nowList,studentStaticList);                  
                    return studentStaticList;
                }
                private List<StudentStatistics> convertData(List<TomEmp> nowList,List<StudentStatistics> studentStaticList) {
                    for(TomEmp emp : nowList) {
                        if(emp.getName().length()>50) {
                            logger.error("名字超长为"+emp.getName());
                            continue;
                        }
                        paramMap.clear();
                        paramMap.put("code", emp.getCode());
                        List<StudentStatistics> studentList = studentInfoMapper.selectStudentData(paramMap);
                        for(StudentStatistics model : studentList) {
                            model.setOrgBeginDate(emp.getOrgbegindate());
                            model.setPostSeriesName(emp.getPostseriesname());
                            model.setCityName(emp.getCityname());
                            model.setPostStat(emp.getPoststat());
                            model.setDeptCode(emp.getDeptcode());
                            model.setName(emp.getName());
                            try {
                                    //封装一级部门到五级部门
                                    if(model.getDeptTopCode()!=null) {
                                        List<DeptInfo> deptInfo =  currencyService.selectTopDepts(model.getDeptTopCode());
                                        for(int j=1;j<=deptInfo.size();j++) {
                                                if(j>5) break;
                                                if(j==1) {
                                                    model.setFirstDeptName(deptInfo.get(deptInfo.size()-1).getDeptName());
                                                }else if(j==2) {
                                                    model.setSecondDeptName(deptInfo.get(deptInfo.size()-2).getDeptName());
                                                }else if(j==3) {
                                                    model.setThirdDeptName(deptInfo.get(deptInfo.size()-3).getDeptName());
                                                }else if(j==4) {
                                                    model.setFourDeptName(deptInfo.get(deptInfo.size()-4).getDeptName());
                                                }else if(j==5) {
                                                    model.setFiveDeptName(deptInfo.get(deptInfo.size()-5).getDeptName());
                                                }
                                        }
                                 }
                                //如果是活动中的考试、课程则查询相关活动信息
                                if(model.getTaskType().equals(ConstantsUtil.STUDENT_ACTIVITY_EXAM)||
                                    model.getTaskType().equals(ConstantsUtil.STUDENT_ACTIVITY_COURSE)) {
                                    paramMap.put("activityId", Integer.parseInt(model.getActivityId()));
                                    paramMap.put("code", model.getCode());
                                    StudentStatistics student = studentInfoMapper.selectActivityInfo(paramMap);
                                     if(student!=null) {
                                            model.setActivityNumber(student.getActivityNumber());
                                            model.setActivityName(student.getActivityName());
                                            model.setActivityStatus(student.getActivityStatus());
                                        }
                                }
                            }catch(Exception e) {
                                logger.error("同步学员档案异常,工号为："+model.getCode());
                                continue;
                            }
                        }
                        studentStaticList.addAll(studentList);
                    }
                     return studentStaticList;
                }
            };
            cList.add(task);
        }
        List<Future<List<StudentStatistics>>> results = eService.invokeAll(cList);
        for(int j=0;j<results.size();j++){
            saveList.addAll(results.get(j).get());
        }
        //保存学员档案
        jdbcService.batchInsertStudentInfo(saveList);
        eService.shutdown();

参考：https://blog.youkuaiyun.com/java_chegnxuyuan/article/details/90081277