优秀课设基于Java开发的动态生成二维码的学生签到系统源码（包含运行说明+数据库）.zip

package com.qiandao8.qiandao8.service.impl; import com.fasterxml.jackson.core.JsonProcessingException; import com.fasterxml.jackson.databind.ObjectMapper; import com.github.pagehelper.PageHelper; import com.github.pagehelper.PageInfo; import com.qiandao8.qiandao8.common.ServerResponse; import com.qiandao8.qiandao8.common.SessionContext; import com.qiandao8.qiandao8.domain.Activity; import com.qiandao8.qiandao8.domain.UserInfo; import com.qiandao8.qiandao8.mapper.ActivityMapper; import com.qiandao8.qiandao8.qo.ActivityQueryObject; import com.qiandao8.qiandao8.service.IActivityService; import org.apache.commons.lang3.StringUtils; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; import org.springframework.transaction.annotation.Transactional; import java.util.Date; import java.util.List; /** * @author Bert Q * ClassName : ActivityServiceImpl * Description TODO */ @Service public class ActivityServiceImpl implements IActivityService { @Autowired private ActivityMapper activityMapper; @Autowired private ObjectMapper jsonParser; @Override @Transactional public ServerResponse createActivity(Activity activity) { try { if (StringUtils.isBlank(activity.getActivityName()) || activity.getStartTime() == null || activity.getEndTime() == null) { return ServerResponse.createByErrorMessage("创建活动失败!非法参数！"); } activity.setId(null); activity.setStatus(Activity.STATES_NORMAL); activity.setParticipantsNums(0); activity.setOriginatorId(SessionContext.getCurrentUser().getId()); if (activity.getEndTime().getTime() < activity.getStartTime().getTime()) { activity.setEndTime(activity.getStartTime()); } activity.setBasicSelc(jsonParser.writeValueAsString(activity.getBasicComponents())); activity.setListSelc(jsonParser.writeValueAsString(activity.getListComponents())); if (activityMapper.insert(activity) > 0) { // 将最近一次生成的活动放到session中 SessionContext.putNearestActivity(activity); return ServerResponse.createBySuccessMessage("创建活动成功！"); } } catch (JsonProcessingException e) { e.printStackTrace(); return ServerResponse.createByErrorMessage("创建活动失败!"); } return ServerResponse.createByErrorMessage("创建活动失败!"); } @Override public ServerResponse getParticipantNumbers(Long id) { // TODO 暂时没做权限检查：因为单纯返回活动签到人数的数据，不涉及到其他敏感信息 Integer participantsNum = activityMapper.getParticipantsNum(id); if (participantsNum == null) { return ServerResponse.createByError(); } return ServerResponse.createBySuccess(participantsNum); } @Override public ServerResponse getActivity(Long aid) { UserInfo currentUser = SessionContext.getCurrentUser(); // 权限检查 if (currentUser == null && SessionContext.getEnableAttendActivityPermission() == null) { return ServerResponse.createByErrorMessage("没有足够的权限"); } updateActivitiesStatus(); Activity activity = activityMapper.selectByPrimaryKey(aid); if (activity == null) { return ServerResponse.createByErrorMessage("未查询到对应活动！"); } // 判断当前登录用户是否有权限查询他 if (currentUser != null && !activity.getOriginatorId().equals(currentUser.getId())) { return ServerResponse.createByErrorMessage("没有足够的权限"); } return ServerResponse.createBySuccess(activity); } @Override public ServerResponse getActivity() { // 权限检查 if (SessionContext.getCurrentUser() == null && SessionContext.getEnableAttendActivityPermission() == null) { return ServerResponse.createByErrorMessage("没有足够的权限"); } updateActivitiesStatus(); Activity nearestActivity = SessionContext.getNearestActivity(); if (nearestActivity == null) { return ServerResponse.createByErrorMessage("查询失败！"); } Activity activity = activityMapper.selectByPrimaryKey(nearestActivity.getId()); if (activity == null) { return ServerResponse.createByErrorMessage("未查询到对应活动！"); } return ServerResponse.createBySuccess(activity); } @Override public ServerResponse listActivities(ActivityQueryObject queryObject) { updateActivitiesStatus(); queryObject.setOriginatorId(SessionContext.getCurrentUser().getId()); PageHelper.startPage(queryObject.getCurrentPage(), queryObject.getPageSize()); PageInfo<Activity> data = new PageInfo<>(activityMapper.listActivitiesByQueryObj(queryObject)); return ServerResponse.createBySuccess(data); } /** * 在每次查询之前，调用一次这个方法，更新活动的状态 */ @Override @Transactional public void updateActivitiesStatus() { List<Long> activities = activityMapper.listFinishedActivities(new Date()); for (Long activityId : activities) { activityMapper.updateActivitiesStatus(activityId, Activity.STATES_FINISH); } } @Override @Transactional public ServerResponse deleteActivities(Long aid) { int effectCount = activityMapper.deleteActivity(aid, SessionContext.getCurrentUser().getId()); if (effectCount > 0) { return ServerResponse.createBySuccessMessage("操作成功！"); } return ServerResponse.createByErrorMessage("操作失败！"); } }