poi设置行距固定磅数

  public void setSingleLineSpacing(XWPFParagraph paragraph) {
        CTP ctp = paragraph.getCTP();
        CTPPr ppr = ctp.isSetPPr() ? ctp.getPPr() : ctp.addNewPPr();
        CTSpacing spacing = ppr.isSetSpacing()? ppr.getSpacing() : ppr.addNewSpacing();
        spacing.setAfter(BigInteger.valueOf(0));
        spacing.setBefore(BigInteger.valueOf(0));
        //注意设置行距类型为 EXACT
        spacing.setLineRule(STLineSpacingRule.EXACT);
        //1磅数是20
        spacing.setLine(BigInteger.valueOf(480));


    }