报表 PDF 导出报错,导出 excel 无法导出报表的背景图

做了一个报表,其中行数 1400,且每个单元格得高度 11 像素,点击导出 PDF, 报超出页面高度?java.lang.Exception: 报表超出了 PDF 的最大页面高度。
at com.view.pdf.PdfReport.export(PdfReport.java:180)
at com.raqsoft.report.view.pdf.PdfReport.export(Unknown Source:55)
at com.raqsoft.report.view.pdf.PdfReportServlet.service(Unknown Source:1
73)
at com.raqsoft.report.view.ReportServlet.service(Unknown Source:1335)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl
icationFilterChain.java:303)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF
ilterChain.java:208)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52
)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl
icationFilterChain.java:241)