<span style = 'color:red'></span>

    /**
     * 添加高亮
     * @param str
     * @param keyword
     * @return
     */
    private String getHitCode(String str , String keyword) {

        if(StringUtils.isEmpty(keyword) || StringUtils.isEmpty(str)) {
            return str;
        }

        String lowerCaseStr = str.toLowerCase();
        String lowerKeyword = keyword.toLowerCase();
        String [] lowerCaseArray = lowerCaseStr.split(lowerKeyword);

        Boolean isEndWith = lowerCaseStr.endsWith(lowerKeyword);

        // 计算分割后的字符串位置
        Integer count = 0;
        List<Map<String, Integer>> list = new ArrayList<>();
        List<Map<String, Integer>> keyList = new ArrayList<>();
        for(int a=0; a<lowerCaseArray.length; a++) {

            // 将切割出来的存储map
            Map<String, Integer> map = new HashMap<>();
            Map<String, Integer> keyMap = new HashMap<>();
            map.put("startIndex", count);
            Integer len = lowerCaseArray[a].length();
            count += len;
            map.put("endIndex", count);
            list.add(map);

            if(a < lowerCaseArray.length -1 || isEndWith) {
                // 将keyword存储map
                keyMap.put("startIndex", count);
                count += keyword.length();
                keyMap.put("endIndex", count);
                keyList.add(keyMap);
            }

        }

        // 截取切割对象
        List<String> arrayList = new ArrayList<>();
        for(Map<String, Integer> item : list) {
            Integer start = item.get("startIndex");
            Integer end = item.get("endIndex");
            String itemStr = str.substring(start, end);
            arrayList.add(itemStr);
        }

        // 截取关键字
        List<String> keyArrayList = new ArrayList<>();
        for(Map<String, Integer> item : keyList) {
            Integer start = item.get("startIndex");
            Integer end = item.get("endIndex");
            String itemStr = str.substring(start, end);
            keyArrayList.add(itemStr);
        }

        String startStr = "<span style = 'color:red'>";
        String endStr = "</span>";
        StringBuffer sb = new StringBuffer();

        for(int a=0; a<arrayList.size(); a++) {

            sb.append(arrayList.get(a));

            if(a < arrayList.size() - 1 || isEndWith) {
                sb.append(startStr);
                sb.append(keyArrayList.get(a));
                sb.append(endStr);
            }
        }

        return sb.toString();
    }