这篇文章将为大家详细讲解有关spring中mybatis多表查询处理的示例分析，小编觉得挺实用的，因此分享给大家做个参考，希望大家阅读完这篇文章后可以有所收获。
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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;
@Service
public 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;
}
}关于“spring中mybatis多表查询处理的示例分析”这篇文章就分享到这里了，希望以上内容可以对大家有一定的帮助，使各位可以学到更多知识，如果觉得文章不错，请把它分享出去让更多的人看到。
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