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  • list集合多线程分批导入Mysql

    public int addFreshStudentsNew(List<FreshStudentAndStudentModel> list, String schoolNo) {
        if (list == null || list.isEmpty()) {
            return 0;
        }
        List<StudentEntity> studentEntityList = new LinkedList<>();
        List<EnrollStudentEntity> enrollStudentEntityList = new LinkedList<>();
        List<AllusersEntity> allusersEntityList = new LinkedList<>();

        list.forEach(freshStudentAndStudentModel -> {
            EnrollStudentEntity enrollStudentEntity = new EnrollStudentEntity();
            StudentEntity studentEntity = new StudentEntity();
            BeanUtils.copyProperties(freshStudentAndStudentModel, studentEntity);
            BeanUtils.copyProperties(freshStudentAndStudentModel, enrollStudentEntity);
            String operator = TenancyContext.UserID.get();
            String studentId = BaseUuidUtils.base58Uuid();
            enrollStudentEntity.setId(BaseUuidUtils.base58Uuid());
            enrollStudentEntity.setStudentId(studentId);
            enrollStudentEntity.setIdentityCardId(freshStudentAndStudentModel.getIdCard());
            enrollStudentEntity.setOperator(operator);
            studentEntity.setId(studentId);
            studentEntity.setIdentityCardId(freshStudentAndStudentModel.getIdCard());
            studentEntity.setOperator(operator);
            studentEntityList.add(studentEntity);
            enrollStudentEntityList.add(enrollStudentEntity);
        
            AllusersEntity allusersEntity = new AllusersEntity();
            allusersEntity.setId(enrollStudentEntity.getId());
            allusersEntity.setUserCode(enrollStudentEntity.getNemtCode());
            allusersEntity.setUserName(enrollStudentEntity.getName());
            allusersEntity.setSchoolNo(schoolNo);
            allusersEntity.setTelNum(enrollStudentEntity.getTelNum());
            allusersEntity.setPassword(enrollStudentEntity.getNemtCode());  //密码设置为考生号
            allusersEntityList.add(allusersEntity);
        });


        int nThreads = 50;
        
        int size = enrollStudentEntityList.size();
        ExecutorService executorService = Executors.newFixedThreadPool(nThreads);
        List<Future<Integer>> futures = new ArrayList<Future<Integer>>(nThreads);
        
        for (int i = 0; i < nThreads; i++) {
            final List<EnrollStudentEntity> EnrollStudentEntityImputList = enrollStudentEntityList.subList(size / nThreads * i, size / nThreads * (i + 1));
            final List<StudentEntity> studentEntityImportList = studentEntityList.subList(size / nThreads * i, size / nThreads * (i + 1));
            final List<AllusersEntity> allusersEntityImportList = allusersEntityList.subList(size / nThreads * i, size / nThreads * (i + 1));
        
           Callable<Integer> task1 = () -> {
          studentSave.saveStudent(EnrollStudentEntityImputList,studentEntityImportList,allusersEntityImportList);
               return 1;
            };
          futures.add(executorService.submit(task1));
        }
        executorService.shutdown();
        if (!futures.isEmpty() && futures != null) {
            return 10;
        }
        return -10;
    }

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  • 原文地址:https://www.cnblogs.com/shihaiming/p/15538499.html
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