高亮显示小Demo

public class ItemSearchImpl implements ItemSearchService {
    /**
     * 搜索
     *
     * @param paramMap
     * @return
     */
    @Autowired
    private SolrTemplate solrTemplate;
    @Autowired
    private RedisTemplate redisTemplate;

    @Override
    public Map<String, Object> search(Map paramMap) {

        //获取关键字
        String keywords = (String) paramMap.get("keywords");
        //获取当前页
        Integer pageNo = Integer.parseInt(String.valueOf(paramMap.get("pageNo")));
        //每页查询多少条
          Integer pageSize = Integer.parseInt(String.valueOf(paramMap.get("pageSize")));

            //封装查询对象
        HighlightQuery query = new SimpleHighlightQuery();
        //查询的条件对象·
        Criteria criteria = new Criteria("item_keywords").is(keywords);
        //将查询条件放入对象
       query.addCriteria(criteria);
       //计算从第几页开始读
        if(pageNo==null || pageNo<=0){
            pageNo=1;
        }
        Integer start = (pageNo-1)*pageSize;
        //设置从第几页查询
        query.setOffset(start);
        //设置每页多少条
        query.setRows(pageSize);
        //创建高亮显示对象
        HighlightOptions highlightOptions = new HighlightOptions();
        //设置哪个域需要高亮
        highlightOptions.addField("item_title");
        //高亮的前缀
        highlightOptions.setSimplePrefix("<em style=\" color=red \">");
        //高亮的后缀
        highlightOptions.setSimplePostfix("</em>");
        //将高亮加入到查询对象
        query.setHighlightOptions(highlightOptions);
        //查询并返回结果
        HighlightPage<TbItem> items = solrTemplate.queryForHighlightPage(query, TbItem.class);
        //获取带高亮的集合
        List<HighlightEntry<TbItem>> highlighted = items.getHighlighted();
        List<TbItem> itemList = new ArrayList<>();
        //遍历高亮集合
        for (HighlightEntry<TbItem> itemHighlightEntry: highlighted) {
            TbItem item = itemHighlightEntry.getEntity();
            List<HighlightEntry.Highlight> highlights = itemHighlightEntry.getHighlights();

            if(highlights!=null && highlights.size()>0){
                //获取高亮的标题集合
                List<String> highlightTitle = highlights.get(0).getSnipplets();
                if(highlightTitle!=null&&highlightTitle.size()>0){
                    // 获取高亮的标题
                    String title = highlightTitle.get(0);
                    item.setTitle(title);
                }
            }
            itemList.add(item);
        }
        Map<String,Object> resuleMap = new HashMap<>();
        //查询到的结果集
        resuleMap.put("rows",itemList);
        //总页数
        resuleMap.put("totalPage",items.getTotalPages());
        //总条数
        resuleMap.put("total",items.getTotalElements());
        return resuleMap;

    }
}

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