我的毕业设计是一个前端和后端分离的项目，由前端门户系统和后端管理系统组

      package com.shiep.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.conditions.update.UpdateWrapper;
import com.shiep.dao.IUserDao;
import com.shiep.entity.*;
import com.shiep.mapper.*;
import com.shiep.service.IAnimalSearchService;
import com.shiep.vo.*;
import org.apache.commons.lang.StringUtils;
import org.springframework.stereotype.Component;
import org.springframework.util.CollectionUtils;

import javax.annotation.Resource;
import java.util.ArrayList;
import java.util.List;
import java.util.stream.Collectors;

@Component
public class AnimalSearchServiceImpl implements IAnimalSearchService {
    @Resource
    private IAnimalSearchMapper animalSearchMapper;

    @Resource
    private IUserDao userDao;

    @Resource
    private ILocationDao locationDao;

    @Resource
    private IAnimalCategoryDetailsMapper animalCategoryDetailsMapper;

    @Resource
    private IPhotoAnimalSearchMapper photoAnimalSearchMapper;

    @Resource
    private ICountyMapper countyMapper;

    @Resource
    private IAnimalSearchCommentMapper animalSearchCommentMapper;

    @Resource
    private IUserMapper userMapper;


    @Override
    public boolean saveAnimalSearch(AnimalSearch animalSearch) {
        if (animalSearch == null) {
            return false;
        }
        return this.animalSearchMapper.insert(animalSearch) > 0;
    }


    @Override
    public List<AnimalSearchVo> queryAll(
            Long cityId, Integer categoryId, Long countyId, Integer searchAnimal) {
        List<AnimalSearch> animalSearches = null;

        // 1、）什么都不做  首先必须处理的是cityId 如果为null  查询所有adopt
        if (cityId == null) {
            QueryWrapper<AnimalSearch> qw = new QueryWrapper<>();
            // 没有被删除 并且审核通过的
            qw.lambda().eq(AnimalSearch::getDeleteStatus, 0).eq(AnimalSearch::getVerifyStatus, 1);
            animalSearches = this.animalSearchMapper.selectList(qw);

            List<AnimalSearchVo> animalSearchVos = this.getAnimalSearchVo(animalSearches);
            return animalSearchVos;
        }
        // 2、) 选择地区后：其他都为null
        if (cityId != null && (categoryId == null || categoryId == 0) && countyId == null && searchAnimal == null) {
            // 首先根据cityId查询出所有的县区id
            QueryWrapper<County> qwCounty = new QueryWrapper<>();
            qwCounty.lambda().eq(County::getCityId, cityId);
            List<County> counties = this.countyMapper.selectList(qwCounty);
            List<Long> countyIds = counties.stream().map(County::getId).collect(Collectors.toList());
            if (countyIds.isEmpty()) {
                return new ArrayList<>();
            }
            // 查找
            QueryWrapper<AnimalSearch> qw = new QueryWrapper<>();
            qw.lambda().eq(AnimalSearch::getDeleteStatus, 0).eq(AnimalSearch::getVerifyStatus, 1)
                    .in(AnimalSearch::getCountyId, countyIds);
            animalSearches = this.animalSearchMapper.selectList(qw);

            List<AnimalSearchVo> AnimalSearchVos = this.getAnimalSearchVo(animalSearches);
            return AnimalSearchVos;
        }
        // 3、） 选择了具体的县区
        if (cityId != null && (categoryId == null || categoryId == 0) && countyId != null && searchAnimal == null) {
            QueryWrapper<AnimalSearch> qw = new QueryWrapper<>();
            // 没有被删除 并且审核通过的  h有具体县区
            qw.lambda().eq(AnimalSearch::getDeleteStatus, 0).eq(AnimalSearch::getVerifyStatus, 1)
                        .eq(AnimalSearch::getCountyId, countyId);
            animalSearches = this.animalSearchMapper.selectList(qw);

            List<AnimalSearchVo> animalSearchVos = this.getAnimalSearchVo(animalSearches);
            return animalSearchVos;
        }
        // 4、）选择了宠类
        if (cityId != null && categoryId != null && countyId == null && searchAnimal == null) {
            // 首先根据cityId查询出所有的县区id
            QueryWrapper<County> qwCounty = new QueryWrapper<>();
            qwCounty.lambda().eq(County::getCityId, cityId);
            List<County> counties = this.countyMapper.selectList(qwCounty);
            List<Long> countyIds = counties.stream().map(County::getId).collect(Collectors.toList());
            if (countyIds.isEmpty()) {
                return new ArrayList<>();
            }

            // 其次根据宠类ID选择出具体的宠类id
            QueryWrapper<AnimalCategoryDetails> qwCategory = new QueryWrapper<>();
            qwCategory.lambda().eq(AnimalCategoryDetails::getCategoryId, categoryId);
            List<AnimalCategoryDetails> details = this.animalCategoryDetailsMapper.selectList(qwCategory);
            List<Integer> detailsIds = details.stream().map(AnimalCategoryDetails::getId).collect(Collectors.toList());
            // 查找
                // 记住，mybatisPlus 在查询来的集合为null的前提下 不会组装in的SQL，所以，所有的in我们要自己判断一下
            if (detailsIds.isEmpty()) {
                return new ArrayList<>();
            }

            QueryWrapper<AnimalSearch> qw = new QueryWrapper<>();
            qw.lambda().eq(AnimalSearch::getDeleteStatus, 0).eq(AnimalSearch::getVerifyStatus, 1)
                    .in(AnimalSearch::getCountyId, countyIds).in(AnimalSearch::getCategoryId, detailsIds);
            animalSearches = this.animalSearchMapper.selectList(qw);

            List<AnimalSearchVo> animalSearchVos = this.getAnimalSearchVo(animalSearches);
            return animalSearchVos;
        }
        // 5、）选择了搜索类型 --宠物、主人
        if (cityId != null && (categoryId == null || categoryId == 0) && countyId == null && searchAnimal != null) {
            // 首先根据cityId查询出所有的县区id
            QueryWrapper<County> qwCounty = new QueryWrapper<>();
            qwCounty.lambda().eq(County::getCityId, cityId);
            List<County> counties = this.countyMapper.selectList(qwCounty);
            List<Long> countyIds = counties.stream().map(County::getId).collect(Collectors.toList());
            if (countyIds.isEmpty()) {
                return new ArrayList<>();
            }
            // 查找
            QueryWrapper<AnimalSearch> qw = new QueryWrapper<>();
            qw.lambda().eq(AnimalSearch::getDeleteStatus, 0).eq(AnimalSearch::getVerifyStatus, 1)
                    .in(AnimalSearch::getCountyId, countyIds).eq(AnimalSearch::getSearchAnimal, searchAnimal);
            animalSearches = this.animalSearchMapper.selectList(qw);

            List<AnimalSearchVo> animalSearchVos = this.getAnimalSearchVo(animalSearches);
            return animalSearchVos;
        }
        // 6、）选了具体的县区+宠类
        if (cityId != null && categoryId != null && countyId != null && searchAnimal == null) {
            // 先根据宠类ID选择出具体的宠类id
            QueryWrapper<AnimalCategoryDetails> qwCategory = new QueryWrapper<>();
            qwCategory.lambda().eq(AnimalCategoryDetails::getCategoryId, categoryId);
            List<AnimalCategoryDetails> details = this.animalCategoryDetailsMapper.selectList(qwCategory);
            List<Integer> detailsIds = details.stream().map(AnimalCategoryDetails::getId).collect(Collectors.toList());
            if (detailsIds.isEmpty()) {
                return new ArrayList<>();
            }
            QueryWrapper<AnimalSearch> qw = new QueryWrapper<>();
            // 没有被删除 并且审核通过的  h有具体县区 + 宠类
            qw.lambda().eq(AnimalSearch::getDeleteStatus, 0).eq(AnimalSearch::getVerifyStatus, 1)
                    .eq(AnimalSearch::getCountyId, countyId).in(AnimalSearch::getCategoryId, detailsIds);
            animalSearches = this.animalSearchMapper.selectList(qw);

            List<AnimalSearchVo> animal