反射更新字段

private void appendWaitingToField(MCiDueFin data, String fieldName, Object newValue) {

try {

Field field = data.getClass().getDeclaredField(fieldName);

field.setAccessible(true);

        Object originalValue = field.get(data);
        String originalStr = originalValue != null ? originalValue.toString() : "";

        String newStr = newValue != null ? newValue.toString() : "";

        StringBuilder result = new StringBuilder();
        if (!originalStr.isEmpty()) {
            result.append(originalStr);
        }
        if (!newStr.isEmpty()) {
            if (result.length() > 0) result.append(" ");
            result.append(newStr);
        }

        // 设置回字段
        field.set(data, result.toString());

        System.out.println("字段 " + fieldName + " 更新为: " + result.toString());

    } catch (NoSuchFieldException e) {
        System.out.println("字段不存在: " + fieldName);
    } catch (Exception e) {
        e.printStackTrace();
    }
}