56 lines
2.0 KiB
Java
56 lines
2.0 KiB
Java
package top.weiyuexin.service.impl;
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import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
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import com.baomidou.mybatisplus.core.metadata.IPage;
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import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
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import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
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import org.apache.logging.log4j.util.Strings;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.stereotype.Service;
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import top.weiyuexin.mapper.ProblemMapper;
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import top.weiyuexin.pojo.Problem;
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import top.weiyuexin.service.ProblemService;
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import java.util.List;
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/**
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* @PackageName: top.weiyuexin.service.impl
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* @ProjectName: Online-code-evaluation-system
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* @ClassName: ProblemServiceImpl
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* @Author: Weiyuexin
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* @Email: 3022422894@qq.com
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* @Date: 2023/2/7 21:27
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*/
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@Service
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public class ProblemServiceImpl extends ServiceImpl<ProblemMapper, Problem> implements ProblemService {
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@Autowired
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private ProblemMapper problemMapper;
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@Override
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public IPage<Problem> getPage(Integer currentPage, Integer pageSize, Problem problem) {
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LambdaQueryWrapper<Problem> lqw = new LambdaQueryWrapper<>();
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//如果不为空，则查询
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lqw.like(Strings.isNotEmpty(problem.getTitle()), Problem::getTitle, problem.getTitle()).or().
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like(problem.getId()!=null,Problem::getId, problem.getId()).or().like(Strings.isNotEmpty(problem.getDifficulty()),Problem::getDifficulty, problem.getDifficulty());
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lqw.orderByDesc(Problem::getId);
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IPage<Problem> page = new Page<>(currentPage, pageSize);
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problemMapper.selectPage(page, lqw);
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return page;
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}
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/**
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* 获取首页题目排行
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*
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* @return
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*/
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@Override
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public List<Problem> hotProblems(Integer num) {
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LambdaQueryWrapper<Problem> lqw = new LambdaQueryWrapper<>();
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lqw.orderByDesc(Problem::getSubmitNum);
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lqw.last("limit " + num);
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List<Problem> problems = problemMapper.selectList(lqw);
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return problems;
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}
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}
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