@Override
    public void characters(char[] ch, int start, int length) {
        if (!isTagt || ignoreTagt) {
            return;
        }
        if (currentElementData == null) {
            currentElementData = new StringBuilder();
        }
        currentElementData.append(ch, start, length);
    }
The only time you need to read the characters in the T tag is when it is used
fastexcel-core/src/main/java/cn/idev/excel/analysis/v07/handlers/sax/SharedStringsTableHandler.java