基于Java的校园二手交易平台设计与实现源码

package com.mindskip.xzs.service.impl; import com.mindskip.xzs.domain.*; import com.mindskip.xzs.domain.enums.ExamPaperAnswerStatusEnum; import com.mindskip.xzs.domain.enums.ExamPaperTypeEnum; import com.mindskip.xzs.domain.enums.QuestionTypeEnum; import com.mindskip.xzs.domain.exam.ExamPaperTitleItemObject; import com.mindskip.xzs.domain.other.KeyValue; import com.mindskip.xzs.domain.other.ExamPaperAnswerUpdate; import com.mindskip.xzs.domain.task.TaskItemAnswerObject; import com.mindskip.xzs.repository.*; import com.mindskip.xzs.repository.ExamPaperAnswerMapper; import com.mindskip.xzs.repository.ExamPaperMapper; import com.mindskip.xzs.repository.QuestionMapper; import com.mindskip.xzs.repository.TaskExamCustomerAnswerMapper; import com.mindskip.xzs.service.ExamPaperAnswerService; import com.mindskip.xzs.service.ExamPaperQuestionCustomerAnswerService; import com.mindskip.xzs.service.TextContentService; import com.mindskip.xzs.utility.DateTimeUtil; import com.mindskip.xzs.utility.ExamUtil; import com.mindskip.xzs.utility.JsonUtil; import com.mindskip.xzs.viewmodel.student.exam.ExamPaperSubmitItemVM; import com.mindskip.xzs.viewmodel.student.exam.ExamPaperSubmitVM; import com.mindskip.xzs.viewmodel.student.exampaper.ExamPaperAnswerPageVM; import com.github.pagehelper.PageHelper; import com.github.pagehelper.PageInfo; import com.mindskip.xzs.domain.*; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; import org.springframework.transaction.annotation.Transactional; import java.util.ArrayList; import java.util.Date; import java.util.List; import java.util.stream.Collectors; @Service public class ExamPaperAnswerServiceImpl extends BaseServiceImpl<ExamPaperAnswer> implements ExamPaperAnswerService { private final ExamPaperAnswerMapper examPaperAnswerMapper; private final ExamPaperMapper examPaperMapper; private final TextContentService textContentService; private final QuestionMapper questionMapper; private final ExamPaperQuestionCustomerAnswerService examPaperQuestionCustomerAnswerService; private final TaskExamCustomerAnswerMapper taskExamCustomerAnswerMapper; @Autowired public ExamPaperAnswerServiceImpl(ExamPaperAnswerMapper examPaperAnswerMapper, ExamPaperMapper examPaperMapper, TextContentService textContentService, QuestionMapper questionMapper, ExamPaperQuestionCustomerAnswerService examPaperQuestionCustomerAnswerService, TaskExamCustomerAnswerMapper taskExamCustomerAnswerMapper) { super(examPaperAnswerMapper); this.examPaperAnswerMapper = examPaperAnswerMapper; this.examPaperMapper = examPaperMapper; this.textContentService = textContentService; this.questionMapper = questionMapper; this.examPaperQuestionCustomerAnswerService = examPaperQuestionCustomerAnswerService; this.taskExamCustomerAnswerMapper = taskExamCustomerAnswerMapper; } @Override public PageInfo<ExamPaperAnswer> studentPage(ExamPaperAnswerPageVM requestVM) { return PageHelper.startPage(requestVM.getPageIndex(), requestVM.getPageSize(), "id desc").doSelectPageInfo(() -> examPaperAnswerMapper.studentPage(requestVM)); } @Override public ExamPaperAnswerInfo calculateExamPaperAnswer(ExamPaperSubmitVM examPaperSubmitVM, User user) { ExamPaperAnswerInfo examPaperAnswerInfo = new ExamPaperAnswerInfo(); Date now = new Date(); ExamPaper examPaper = examPaperMapper.selectByPrimaryKey(examPaperSubmitVM.getId()); ExamPaperTypeEnum paperTypeEnum = ExamPaperTypeEnum.fromCode(examPaper.getPaperType()); //任务试卷只能做一次 if (paperTypeEnum == ExamPaperTypeEnum.Task) { ExamPaperAnswer examPaperAnswer = examPaperAnswerMapper.getByPidUid(examPaperSubmitVM.getId(), user.getId()); if (null != examPaperAnswer) return null; } String frameTextContent = textContentService.selectById(examPaper.getFrameTextContentId()).getContent(); List<ExamPaperTitleItemObject> examPaperTitleItemObjects = JsonUtil.toJsonListObject(frameTextContent, ExamPaperTitleItemObject.class); List<Integer> questionIds = examPaperTitleItemObjects.stream().flatMap(t -> t.getQuestionItems().stream().map(q -> q.getId())).collect(Collectors.toList()); List<Question> questions = questionMapper.selectByIds(questionIds); //将题目结构的转化为题目答案 List<ExamPaperQuestionCustomerAnswer> examPaperQuestionCustomerAnswers = examPaperTitleItemObjects.stream() .flatMap(t -> t.getQuestionItems().stream() .map(q -> { Question question = questions.stream().filter(tq -> tq.getId().equals(q.getId())).findFirst().get(); ExamPaperSubmitItemVM customerQuestionAnswer = examPaperSubmitVM.getAnswerItems().stream() .filter(tq -> tq.getQuestionId().equals(q.getId())) .findFirst() .orElse(null); return ExamPaperQuestionCustomerAnswerFromVM(question, customerQuestionAnswer, examPaper, q.getItemOrder(), user, now); }) ).collect(Collectors.toList()); ExamPaperAnswer examPaperAnswer = ExamPaperAnswerFromVM(examPaperSubmitVM, examPaper, examPaperQuestionCustomerAnswers, user, now); examPaperAnswerInfo.setExamPaper(examPaper); examPaperAnswerInfo.setExamPaperAnswer(examPaperAnswer); examPaperAnswerInfo.setExamPaperQuestionCustomerAnswers(examPaperQuestionCustomerAnswers); return examPaperAnswerInfo; } @Override @Transactional public String judge(ExamPaperSubmitVM examPaperSubmitVM) { ExamPaperAnswer examPaperAnswer = examPaperAnswerMapper.selectByPrimaryKey(examPaperSubmitVM.getId()); List<ExamPaperSubmitItemVM> judgeItems = examPaperSubmitVM.getAnswerItems().stream().filter(d -> d.getDoRight() == null).collect(Collectors.toList()); List<ExamPaperAnswerUpdate> examPaperAnswerUpdates = new ArrayList<>(judgeItems.size()); Integer customerScore = examPaperAnswer.getUserScore(); Integer questionCorrect = examPaperAnswer.getQuestionCorrect(); for (ExamPaperSubmitItemVM d : judgeItems) { ExamPaperAnswerUpdate examPaperAnswerUpdate = new ExamPaperAnswerUpdate(); examPaperAnswerUpdate.setId(d.getId()); examPaperAnswerUpdate.setCustomerScore(ExamUtil.scoreFromVM(d.getScore())); boolean doRight = examPaperAnswerUpdate.getCustomerScore().equals(ExamUtil.scoreFromVM(d.getQuestionScore())); examPaperAnswerUpdate.setDoRight(doRight); examPaperAnswerUpdates.add(examPaperAnswerUpdate); customerScore += examPaperAnswerUpdate.getCustomerScore(); if (examPaperAnswerUpdate.getDoRight()) { ++questionCorrect; } } examPaperAnswer.setUserScore(customerScore); examPaperAnswer.setQuestionCorrect(questionCorrect); examPaperAnswer.setStatus(ExamPaperAnswerStatusEnum.Complete.getCode()); examPaperAnswerMapper.updateByPrimaryKeySelective(examPaperAnswer); examPaperQuestionCustomerAnswerService.updateScore(examPaperAnswerUpdates); ExamPaperTypeEnum examPaperTypeEnum = ExamPaperTypeEnum.fromCode(examPaperAnswer.getPaperType()); switch (examPaperTypeEnum) { case Task: //任务试卷批改完成后，需要更新任务的状态 ExamPaper examPaper = examPaperMapper.selectByPrimaryKey(examPaperAnswer.getExamPaperId()); Integer taskId = examPaper.getTaskExamId(); Integer userId = examPaperAnswer.getCreateUser(); TaskExamCustomerAnswer taskExamCustomerAnswer = taskExamCustomerAnswerMapper.getB