怎么能用apache poi把最后一行带边框？

Question

我需要用边框写下最后一行。我尝试过：

paragraph.setBorderBottom(Borders.BASIC_BLACK_SQUARES);
paragraph.setBorderTop(Borders.BASIC_BLACK_SQUARES);

但结果是错误的。拜托，有人能帮帮我吗？

谢谢！