EXEED_back/src/main/java/com/zh/project0512/serviceImpl/RankServiceImpl.java

package com.zh.project0512.serviceImpl;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.zh.project0512.mapper.RankMapper;
import com.zh.project0512.model.Rank;
import com.zh.project0512.model.dto.RankListDTO;
import com.zh.project0512.model.vo.RankListVo;
import com.zh.project0512.service.IRankService;
import com.zh.project0512.utils.PropertyUtils;
import com.zh.project0512.utils.page.PageInfo;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Date;
import java.util.List;

@Service
public class RankServiceImpl implements IRankService {
    @Resource
    RankMapper rankMapper;

    @Override
    public PageInfo<RankListVo> rankList(RankListDTO rankListDTO) {
        ArrayList<RankListVo> rankListVoList = new ArrayList<>();
        Calendar cal = Calendar.getInstance();
        cal.setTime(new Date());
        cal.add(Calendar.MONTH,-1);
        cal.set(Calendar.DAY_OF_MONTH,1);
        cal.set(Calendar.HOUR_OF_DAY, 0);
        cal.set(Calendar.MINUTE, 0);
        cal.set(Calendar.SECOND, 0);
        cal.set(Calendar.MILLISECOND,0);
        Date time = cal.getTime();
        SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd 00:00:00");
        try {
            time = simpleDateFormat.parse(simpleDateFormat.format(time));
        } catch (ParseException e) {
            e.printStackTrace();
        }

        QueryWrapper<Rank> queryWrapper = new QueryWrapper<>();
        queryWrapper.eq("type",rankListDTO.getType());
        queryWrapper.eq("dateStart",time);
        Page<Rank> page = new Page<>(rankListDTO.getPageNum(), rankListDTO.getPageSize());
        IPage<Rank> rankIPage = rankMapper.selectPage(page, queryWrapper);
        List<Rank> records = rankIPage.getRecords();
        if (records != null && records.size()>0){
            for (Rank record : records) {
                RankListVo rankListVo = new RankListVo();
                PropertyUtils.copyProperties(record,rankListVo);
                rankListVoList.add(rankListVo);
            }
        }
        return new PageInfo<>(rankIPage.getPages(), rankListVoList, rankIPage.getTotal());
    }
}