基于springboot+mybatis班级管理系统后端项目.zip

package com.springboot.management.service.impl; import com.github.pagehelper.PageHelper; import com.github.pagehelper.PageInfo; import com.springboot.management.common.enums.ExceptionEnum; import com.springboot.management.common.exception.MyException; import com.springboot.management.common.utils.PageVO; import com.springboot.management.mapper.ArticleMapper; import com.springboot.management.service.ArticleService; import com.springboot.management.vo.Article; import com.springboot.management.vo.College; import com.springboot.management.vo.Comment; import com.springboot.management.vo.Sort; 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.List; /* *@Author 左创源 * @date 2020/04/18 *文章service实现层 */ @Service @Transactional public class ArticleServiceImpl implements ArticleService { @Autowired ArticleMapper articleMapper; @Override public void addArticle(Article article) { int i = articleMapper.addArticle(article); if (i==0){ throw new MyException(ExceptionEnum.SERVER_CONGESTION); } } @Override public PageInfo findAllSort(PageVO pageVO) { PageHelper.startPage(pageVO.getPage(), pageVO.getRows()); List<Sort> list = articleMapper.findAllSort(pageVO.getKey()); PageInfo info = new PageInfo(list); return info; } @Override public void addSort(Sort sort) { int i = articleMapper.addSort(sort); if (i==0){ throw new MyException(ExceptionEnum.SERVER_CONGESTION); } } @Override public void updateSort(Sort sort) { int i = articleMapper.updateSort(sort); if (i==0){ throw new MyException(ExceptionEnum.SERVER_CONGESTION); } } @Override public void banSort(Sort sort) { int i = articleMapper.banSort(sort); if (i==0){ throw new MyException(ExceptionEnum.SERVER_CONGESTION); } } @Override public void banSortRows(List list) { int i = articleMapper.banSortRows(list); if (i==0){ throw new MyException(ExceptionEnum.SERVER_CONGESTION); } } @Override public PageInfo findAllArticle(PageVO pageVO) { PageHelper.startPage(pageVO.getPage(), pageVO.getRows()); List<Article> list = articleMapper.findAllArticle(pageVO.getKey()); PageInfo info = new PageInfo(list); return info; } @Override public List<Sort> getSort() { List<Sort> list=articleMapper.getSort(); return list; } @Override public void banArticle(Article article) { int i = articleMapper.banArticle(article); if (i==0){ throw new MyException(ExceptionEnum.SERVER_CONGESTION); } } @Override public void banArticleRows(List list) { int i = articleMapper.banArticleRows(list); if (i==0){ throw new MyException(ExceptionEnum.SERVER_CONGESTION); } } @Override public Article getArticle(int id) { Article article=articleMapper.getArticle(id); if(article!=null){ articleMapper.addQuantity(id); } return article; } @Override public List<Comment> getComments(int aid) { List<Comment> allComments = articleMapper.getComments(aid); if (allComments == null || allComments.size() == 0) { return new ArrayList<>(); } List<Comment> comments = new ArrayList<>(); List<Comment> parents = new ArrayList<>(); for (Comment comment : allComments) { if (comment.getPid()==null) { comments.add(comment); parents.add(comment); } else { boolean foundParent=false; for (Comment parent : parents) { if (comment.getPid().equals(parent.getId())) { if (parent.getChild() == null) { parent.setChild(new ArrayList<>()); } parent.getChild().add(comment); parents.add(comment); foundParent=true; //如果对list迭代过程中同时修改list，会报java.util.ConcurrentModificationException 的异常，所以我们需要break,当然break也可以提高算法效率 break; } } if (!foundParent) { throw new RuntimeException("can not find the parent comment"); } } } return comments; } @Override public void addComments(Comment comment) { int i = articleMapper.addComments(comment); if (i==0){ throw new MyException(ExceptionEnum.SERVER_CONGESTION); } } @Override public void addReply(Comment comment) { int i = articleMapper.addReply(comment); if (i==0){ throw new MyException(ExceptionEnum.SERVER_CONGESTION); } } //查看文章中回复我的消息 @Override public PageInfo getReply(PageVO pageVO) { PageHelper.startPage(pageVO.getPage(), pageVO.getRows()); List<Comment> list = articleMapper.getReply(pageVO.getKey()); PageInfo info = new PageInfo(list); return info; } @Override public PageInfo getArticleComment(PageVO pageVO) { PageHelper.startPage(pageVO.getPage(), pageVO.getRows()); List<Comment> list = articleMapper.getArticleComment(pageVO.getKey()); PageInfo info = new PageInfo(list); return info; } }