spring中mybatis多表查询处理的示例分析

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package com.swhy.bw.advisor.center.comment;import com.github.pagehelper.Page;import com.github.pagehelper.PageHelper;import com.github.pagehelper.PageInfo;import com.swhy.bw.advisor.dal.mapper.ApCommentExtMapper;import com.swhy.bw.advisor.dao.biz.response.theme.AdviserThemeDetailRes;import com.swhy.bw.advisor.dao.biz.response.user.UserInfoRes;import com.swhy.bw.advisor.dao.center.request.comment.CommentCenterListReq;import com.swhy.bw.advisor.dao.center.request.comment.CommentCenterModifyReq;import com.swhy.bw.advisor.dao.center.request.comment.SelectCommentReq;import com.swhy.bw.advisor.dao.center.response.comment.CommentCenterListRes;import com.swhy.bw.advisor.dao.center.response.comment.CommentDetailRes;import com.swhy.bw.advisor.dao.entity.ApComment;import com.swhy.bw.advisor.dao.entity.ApLiveRoom;import com.swhy.bw.advisor.dao.entity.VdInvestAdviser;import com.swhy.bw.advisor.elasticsearch.utils.AdviserEsUtils;import com.swhy.bw.advisor.elasticsearch.utils.AdviserThemeEsUtils;import com.swhy.bw.advisor.elasticsearch.utils.LiveRoomEsUtils;import com.swhy.bw.advisor.elasticsearch.utils.UserEsUtils;import com.swhy.bw.advisor.enums.CommentEnums;import com.swhy.bw.advisor.util.CollectionUtils;import com.swhy.bw.advisor.util.ExceptionUtil;import com.swhy.bw.advisor.util.StringUtils;import com.swhy.bw.advisor.util.date.DateFormat;import com.swhy.bw.advisor.util.date.DateUtils;import com.swhy.bw.advisor.util.exception.BusinessException;import com.swhy.bw.advisor.util.log.LOG_TYPE;import com.swhy.bw.advisor.util.log.LogUtil;import com.swhy.bw.advisor.util.route.RouteUtil;import com.swhy.bw.common.util.date.DateUtil;import org.springframework.beans.BeanUtils;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.stereotype.Service;import java.util.*;import java.util.stream.Collectors;@Servicepublic class ApCommentMgmtService {    @Autowired    private ApCommentExtMapper apCommentExtMapper;    @Autowired    private AdviserThemeEsUtils adviserThemeEsUtils;    public PageInfo findApCommentList(CommentCenterListReq apCommentReq) throws BusinessException {        final String METHOD = "findApCommentList";        try {            PageHelper.startPage(apCommentReq.getPageNum(), apCommentReq.getPageSize());            LogUtil.logInput(LOG_TYPE.BIZ.val, this, METHOD, apCommentReq);            // 请求参数            if (apCommentReq.getEndDate() != null)                apCommentReq.setEndDate(DateUtil.addDay(apCommentReq.getEndDate(), 1));            // 查询评论列表            Page records = (Page) apCommentExtMapper.selectCommentListAll(apCommentReq);            if (records == null) {                return new PageInfo<>();            }            Page resPage = new Page<>();            BeanUtils.copyProperties(records, resPage);            // 查询投顾信息            HashMap adviserMap = getAdviserInfo(records);            // 查询标题信息            HashMap titleMap;            if (apCommentReq.getCommentType().equals(CommentEnums.comment_type_theme.getValue())) {                titleMap = getThemeInfo(records);            } else {                titleMap = getLiveroomInfo(records);            }            // 转换            records.forEach(record -> {                CommentCenterListRes res = new CommentCenterListRes();                BeanUtils.copyProperties(record, res);                res.setTitle(titleMap.getOrDefault(record.getCommentId(), ""));                res.setInvestAdviserName(adviserMap.getOrDefault(record.getAdviserId(), ""));                res.setPublishTime(DateUtil.formateDate2Str(record.getPublishTime(), "yyyy-MM-dd HH:mm:ss"));                res.setCommentContent(record.getContent());                resPage.add(res);            });            return new PageInfo<>(resPage);        } catch (Exception e) {            LogUtil.logError(LOG_TYPE.BIZ.val, this, METHOD, e);            throw ExceptionUtil.generateException("评论列表查询异常", e);        }    }    private HashMap getThemeInfo(Page records) {        HashMap themeMap = new HashMap<>();        List themeIds = records.stream().map(ApComment::getCommentId).distinct().collect(Collectors.toList());        List themeDetailResList = adviserThemeEsUtils.findThemeByIds(themeIds);        if (CollectionUtils.isNotEmpty(themeDetailResList))            themeDetailResList.forEach(theme -> themeMap.put(theme.getId(), theme.getTitle()));        return themeMap;    }    private HashMap getLiveroomInfo(Page records) {        HashMap themeMap = new HashMap<>();        List liveroomIds = records.stream().map(ApComment::getCommentId).distinct().collect(Collectors.toList());        List liveRooms = LiveRoomEsUtils.findByIds(liveroomIds);        if (CollectionUtils.isNotEmpty(liveRooms))            liveRooms.forEach(liveRoom -> themeMap.put(liveRoom.getId(), liveRoom.getTitle()));        return themeMap;    }    private HashMap getAdviserInfo(Page records) {        HashMap adviserMap = new HashMap<>();        List adviserIds = records.stream().map(ApComment::getAdviserId).distinct().collect(Collectors.toList());        List advisers = AdviserEsUtils.findByIds(adviserIds);        if (CollectionUtils.isNotEmpty(advisers))            advisers.forEach(adviser -> adviserMap.put(adviser.getId(), adviser.getInvestAdviserName()));        return adviserMap;    }}

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