//打印设置
        sheet.setMargin(Sheet.BottomMargin,0.2);
        sheet.setMargin(Sheet.TopMargin,0.2);
        sheet.setMargin(Sheet.LeftMargin,0.2);
        sheet.setMargin(Sheet.RightMargin,0.2);
        XSSFPrintSetup printSetup = sheet.getPrintSetup();
        printSetup.setPaperSize(PaperSize.A3_PAPER);
        //横向
        printSetup.setLandscape(true);