content: 
  package com.platform.modules.system.service.impl;
  
  import cn.hutool.core.collection.CollectionUtil;
  import lombok.RequiredArgsConstructor;
  import com.platform.modules.system.domain.Dict;
  import com.platform.modules.system.service.dto.DictDetailDto;
  import com.platform.modules.system.service.dto.DictQueryCriteria;
  import com.platform.utils.*;
  import com.platform.modules.system.repository.DictRepository;
  import com.platform.modules.system.service.DictService;
  import com.platform.modules.system.service.dto.DictDto;
  import com.platform.modules.system.service.mapstruct.DictMapper;
  import org.springframework.cache.annotation.CacheConfig;
  import org.springframework.data.domain.Page;
  import org.springframework.data.domain.Pageable;
  import org.springframework.stereotype.Service;
  import org.springframework.transaction.annotation.Transactional;
  import javax.servlet.http.HttpServletResponse;
  import java.io.IOException;
  import java.util.*;
  
  /**
  * @author AllDataDC
  * @date 2023-01-27
  */
  @Service
  @RequiredArgsConstructor
  @CacheConfig(cacheNames = "dict")
  public class DictServiceImpl implements DictService {
  
      private final DictRepository dictRepository;
      private final DictMapper dictMapper;
      private final RedisUtils redisUtils;
  
      @Override
      public Map<String, Object> queryAll(DictQueryCriteria dict, Pageable pageable){
          Page<Dict> page = dictRepository.findAll((root, query, cb) -> QueryHelp.getPredicate(root, dict, cb), pageable);
          return PageUtil.toPage(page.map(dictMapper::toDto));
      }
  
      @Override
      public List<DictDto> queryAll(DictQueryCriteria dict) {
          List<Dict> list = dictRepository.findAll((root, query, cb) -> QueryHelp.getPredicate(root, dict, cb));
          return dictMapper.toDto(list);
      }
  
      @Override
      @Transactional(rollbackFor = Exception.class)
      public void create(Dict resources) {
          dictRepository.save(resources);
      }
  
      @Override
      @Transactional(rollbackFor = Exception.class)
      public void update(Dict resources) {
          // 清理缓存
          delCaches(resources);
          Dict dict = dictRepository.findById(resources.getId()).orElseGet(Dict::new);
          ValidationUtil.isNull( dict.getId(),"Dict","id",resources.getId());
          dict.setName(resources.getName());
          dict.setDescription(resources.getDescription());
          dictRepository.save(dict);
      }
  
      @Override
      @Transactional(rollbackFor = Exception.class)
      public void delete(Set<Long> ids) {
          // 清理缓存
          List<Dict> dicts = dictRepository.findByIdIn(ids);
          for (Dict dict : dicts) {
              delCaches(dict);
          }
          dictRepository.deleteByIdIn(ids);
      }
  
      @Override
      public void download(List<DictDto> dictDtos, HttpServletResponse response) throws IOException {
          List<Map<String, Object>> list = new ArrayList<>();
          for (DictDto dictDTO : dictDtos) {
              if(CollectionUtil.isNotEmpty(dictDTO.getDictDetails())){
                  for (DictDetailDto dictDetail : dictDTO.getDictDetails()) {
                      Map<String,Object> map = new LinkedHashMap<>();
                      map.put("字典名称", dictDTO.getName());
                      map.put("字典描述", dictDTO.getDescription());
                      map.put("字典标签", dictDetail.getLabel());
                      map.put("字典值", dictDetail.getValue());
                      map.put("创建日期", dictDetail.getCreateTime());
                      list.add(map);
                  }
              } else {
                  Map<String,Object> map = new LinkedHashMap<>();
                  map.put("字典名称", dictDTO.getName());
                  map.put("字典描述", dictDTO.getDescription());
                  map.put("字典标签", null);
                  map.put("字典值", null);
                  map.put("创建日期", dictDTO.getCreateTime());
                  list.add(map);
              }
          }
          FileUtil.downloadExcel(list, response);
      }
  
      public void delCaches(Dict dict){
          redisUtils.del(CacheKey.DICT_NAME + dict.getName());
      }
  }