基于Springboot的停车场管理系统 数据库：mysql 有数据库文件，拿来即用 可作为毕设参考 如遇到运行问题，可私信

package com.hnevc.CarPark.service.impl; import com.hnevc.CarPark.entity.Car; import com.hnevc.CarPark.entity.StallUsage; import com.hnevc.CarPark.mapper.CarMapper; import com.hnevc.CarPark.mapper.StallUsageMapper; import com.hnevc.CarPark.service.CarService; import com.hnevc.CarPark.service.ex.*; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; import java.util.Date; import java.util.List; @Service public class CarServiceImpl implements CarService { @Autowired private CarMapper carMapper; @Autowired private StallUsageMapper stallUsageMapper; @Override public void addnew(Car car, String username) { // 调用私有方法findByLicenseNumber()查询车辆信息是否已存在 Car result = findByLicenseNumber(car.getLicenseNumber()); if (result != null) { throw new CarDuplicateException("添加车辆信息失败(＞﹏＜) 车辆信息已存在"); } // 补全数据 日志 car.setIsParking(1); Date now = new Date(); car.setCreatedUser(username); car.setCreatedTime(now); car.setModifiedUser(username); car.setModifiedTime(now); // 调用私有方法insert()执行插入数据 insert(car); Integer num; StallUsage stallUsage = stallUsageMapper.findAll(); // 根据添加的车辆类型增加相应的车位占用 switch (car.getTypeId()) { case 1: num = stallUsage.getSmallCars() + 1; stallUsageMapper.updateSmallCars(num); break; case 2: num = stallUsage.getMiddleCars() + 1; stallUsageMapper.updateMiddleCars(num); break; case 3: num = stallUsage.getLargeCars() + 1; stallUsageMapper.updateLargeCars(num); break; } } @Override public void delete(Integer cid) { // 调用私有方法findByCid()查询车辆数据是否存在 Car result = findByCid(cid); if (result == null) { throw new CarNotFoundException("删除车辆信息失败(＞﹏＜) 车辆信息不存在"); } //调用私有方法deleteByCid()执行删除数据 deleteByCid(cid); Integer num; StallUsage stallUsage = stallUsageMapper.findAll(); // 根据删除的车辆类型减少相应的车位占用 switch (result.getTypeId()) { case 1: num = stallUsage.getSmallCars() - 1; stallUsageMapper.updateSmallCars(num); break; case 2: num = stallUsage.getMiddleCars() - 1; stallUsageMapper.updateMiddleCars(num); break; case 3: num = stallUsage.getLargeCars() - 1; stallUsageMapper.updateLargeCars(num); break; } } @Override public void changeByCid(String username, Car car) { // 调用私有方法findByCid()查询车辆信息是否存在 Car result = findByCid(car.getCid()); if (result == null) { throw new CarNotFoundException("修改车辆信息失败(＞﹏＜) 车辆信息不存在"); } Date now = new Date(); Integer num; // 判断当前状态是否在停 if (result.getIsParking() != car.getIsParking()) { car.setOutTime(now); StallUsage stallUsage = stallUsageMapper.findAll(); if (result.getIsParking() == 0 && car.getIsParking() == 1){ switch (car.getTypeId()) { case 1: num = stallUsage.getSmallCars() + 1; stallUsageMapper.updateSmallCars(num); break; case 2: num = stallUsage.getMiddleCars() + 1; stallUsageMapper.updateMiddleCars(num); break; case 3: num = stallUsage.getLargeCars() + 1; stallUsageMapper.updateLargeCars(num); break; } // 更新日志 car.setModifiedUser(username); car.setModifiedTime(now); // 调用私有方法updateByCid()执行修改操作 updateByCid(car); return; } // 根据修改的出场车辆类型减少相应的车位占用 switch (result.getTypeId()) { case 1: num = stallUsage.getSmallCars() - 1; stallUsageMapper.updateSmallCars(num); break; case 2: num = stallUsage.getMiddleCars() - 1; stallUsageMapper.updateMiddleCars(num); break; case 3: num = stallUsage.getLargeCars() - 1; stallUsageMapper.updateLargeCars(num); break; } } else { StallUsage stallUsage1 = stallUsageMapper.findAll(); // 根据修改的原车辆类型减少相应的车位占用 switch (result.getTypeId()) { case 1: num = stallUsage1.getSmallCars() - 1; stallUsageMapper.updateSmallCars(num); break; case 2: num = stallUsage1.getMiddleCars() - 1; stallUsageMapper.updateMiddleCars(num); break; case 3: num = stallUsage1.getLargeCars() - 1; stallUsageMapper.updateLargeCars(num); break; } StallUsage stallUsage2 = stallUsageMapper.findAll(); // 根据修改后的车辆类型增加相应的车位占用 switch (car.getTypeId()) { case 1: num = stallUsage2.getSmallCars() + 1; stallUsageMapper.updateSmallCars(num); break; case 2: num = stallUsage2.getMiddleCars() + 1; stallUsageMapper.updateMiddleCars(num); break; case 3: num = stallUsage2.getLargeCars() + 1; stallUsageMapper.updateLargeCars(num); break; } } // 更新日志 car.setModifiedUser(username); car.setModifiedTime(now); // 调用私有方法updateByCid()执行修改操作 updateByCid(car); } @Override public Car getByCid(Integer cid) { Car result = findByCid(cid); result.setCid(null); result.setTypeId(null); result.setMemberId(null); result.setIsParking(null); result.setOutTime(null); result.setCreatedUser(null); result.setCreatedTime(null); result.setModifiedUser(null); result.setModifiedTime(null); return result; } @Override public List<Car> findAll() { return carMapper.findAll(); } /** * 插入车辆数据 * * @param car 车辆数据 * @return 受影响的行数 */ private void insert(Car car) { Integer rows = carMapper.insert(car); if (rows != 1) { throw new InsertException("添加车辆信息失败(＞﹏＜) 添加车辆信息时出现未知错误，请联系系统管理员"); } } /** * 根据cid删除车辆数据 * * @param cid 车辆数据id * @return 受影响的行数 */ private void deleteByCid(Integer cid) { Integer rows = carMapper.deleteByCid(cid); if (rows != 1) { throw new DeleteException("删除�