基于SpringBoot+Vue的新闻网项目源码.zip

package sqgxy.xxydz.service.impl; import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper; import com.baomidou.mybatisplus.core.conditions.update.UpdateWrapper; import com.baomidou.mybatisplus.extension.plugins.pagination.Page; import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl; import sqgxy.xxydz.dto.*; import sqgxy.xxydz.entity.News; import sqgxy.xxydz.entity.NewsCategory; import sqgxy.xxydz.enums.DisplayContent; import sqgxy.xxydz.exception.HintException; import sqgxy.xxydz.mapper.NewsCategoryMapper; import sqgxy.xxydz.mapper.NewsMapper; import sqgxy.xxydz.module.HeaderImgUpload; import sqgxy.xxydz.service.NewsCategoryService; import sqgxy.xxydz.service.NewsService; import org.modelmapper.ModelMapper; import org.modelmapper.TypeToken; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; import java.io.IOException; import java.util.List; /** * @author xmp * @date 2022-11-19 13:32 */ @Service public class NewsServiceImpl extends ServiceImpl<NewsMapper, News> implements NewsService { @Autowired ModelMapper modelMapper; @Autowired NewsCategoryMapper newsCategoryMapper; @Override public boolean saveNews(NewsAddDTO dto) throws IOException { if (nonentityNewsCategory(dto.getNewsCategoryId())) { throw new HintException("此新闻类别不存在"); } Integer newCategoryId = dto.getNewsCategoryId(); NewsCategory newsCategory = newsCategoryMapper.selectOne(new QueryWrapper<NewsCategory>().select(NewsCategoryService.DISPLAY_CONTENT).eq(NewsCategoryService.ID, newCategoryId)); // 小标题为新闻类型时，该标题下只能存储一篇新闻 if (newsCategory.getDisplayContent() == DisplayContent.NEWS) { // 检查该标题下是否存在新闻 int count = count(new QueryWrapper<News>().eq(NEWS_CATEGORY_ID, newCategoryId)); if (count >= 10) {//todo throw new HintException("该类别下只能存在一篇新闻"); } } // 判断图片是否为空 if (dto.getPictureFile() != null) { String s = HeaderImgUpload.headPortraitUpload(dto.getPictureFile()); dto.setPicturePath(s); } return save(modelMapper.map(dto, News.class)); } @Override public boolean removeNews(Integer id) { return removeById(id); } @Override public boolean updateNews(NewsUpdateDTO dto) throws IOException { // 查看新闻是否存在 int count1 = count(new QueryWrapper<News>().eq(ID, dto.getId())); if (count1 < 1) { throw new HintException("id为" + dto.getId() + "的新闻不存在"); } if (dto.getNewsCategoryId() != null && nonentityNewsCategory(dto.getNewsCategoryId())) { throw new HintException("此新闻类别不存在"); } // dto.getNewsCategoryId() 不为null 说明新闻类别可能会更改，需要判断更改后的类别是否是只能存储一篇新闻的展示新闻类型 if (dto.getNewsCategoryId() != null) { Integer newCategoryId = dto.getNewsCategoryId(); NewsCategory newsCategory = newsCategoryMapper.selectOne(new QueryWrapper<NewsCategory>().select(NewsCategoryService.DISPLAY_CONTENT).eq(NewsCategoryService.ID, newCategoryId)); if (newsCategory.getDisplayContent() == DisplayContent.NEWS) { // 检查该标题下是否存在新闻 int count = count(new QueryWrapper<News>().eq(NEWS_CATEGORY_ID, newCategoryId)); if (count >= 1) { throw new HintException("该类别下只能存在一篇新闻"); } } } // 需要修改图片 if (dto.getPictureFile() != null) { String s = HeaderImgUpload.headPortraitUpload(dto.getPictureFile()); dto.setPicturePath(s); } return updateById(modelMapper.map(dto, News.class)); } @Override public NewsPaging getNewsListByNewsCategoryId(Integer newsCategoryId, Integer current, Integer size) { Page<News> page = page(new Page<>(current, size), new QueryWrapper<News>().select(ID, TITLE, RELEASE_TIME, PICTURE_PATH).eq(NEWS_CATEGORY_ID, newsCategoryId).orderByDesc(RELEASE_TIME)); NewsPaging newsPaging = modelMapper.map(page, NewsPaging.class); List<News> records = page.getRecords(); newsPaging.setRecords(modelMapper.map(records, new TypeToken<List<NewsQueryListDTO>>(){}.getType())); return newsPaging; } @Override public NewsQueryDTO getNewsById(Integer id) { // 新闻点击率加一 News one = getOne(new QueryWrapper<News>().select(HITS).eq(ID, id)); if (one == null) { return null; } update(new UpdateWrapper<News>().set(HITS, one.getHits() + 1).eq(ID, id)); return modelMapper.map(getById(id), NewsQueryDTO.class); } @Override public NewsPaging fuzzyQueryListByTitle(String title, Integer current, Integer size) { Page<News> page = page(new Page<>(current, size), new QueryWrapper<News>().select(ID, TITLE, RELEASE_TIME, PICTURE_PATH).like(TITLE, title).orderByDesc(RELEASE_TIME)); NewsPaging newsPaging = modelMapper.map(page, NewsPaging.class); List<News> records = page.getRecords(); newsPaging.setRecords(modelMapper.map(records, new TypeToken<List<NewsQueryListDTO>>(){}.getType())); return newsPaging; } /** * 不存在 NewsCategory */ private boolean nonentityNewsCategory(Integer newsCategoryId) { Integer count = newsCategoryMapper.selectCount(new QueryWrapper<NewsCategory>().eq(NewsCategoryService.ID, newsCategoryId)); return count < 1; } }