Hi, Sorry, I always use mail to communicate with apache community, so I didn't check dev-list for reply answsers. In my expectation, I think it would reply under my email like you. Now I got it. Thank you, Kevin
On Sun, Jan 13, 2019 at 4:43 PM Dominik Stadler <[email protected]> wrote: > Hi, > > You received an answer at > > https://lists.apache.org/thread.html/460102624d77cf10f0e6a259c2f84163f73f5772bfdc6bcf38377a43@%3Cdev.poi.apache.org%3E > but you did not react in any way to that, so what do you expect? > > If you post to dev-list, you are expected to also look at the dev-list for > answers. > > Dominik. > > On Sun, Jan 13, 2019 at 5:43 AM Kevin Yao <[email protected]> wrote: > > > I am very disappointed about that. > > > > On Sat, Jan 5, 2019 at 10:20 AM Kevin Yao <[email protected]> > wrote: > > > > > Can andbody help me ? I will be very grateful. > > > > > > Thanks， > > > Kevin > > > > > > On Fri, Jan 4, 2019 at 8:12 PM Kevin Yao <[email protected]> > wrote: > > > > > >> hi， > > >> I get a null exception when I use workbook write function with Apache > > POI. > > >> My java code is > > >> > > >> try (OutputStream out = new FileOutputStream(saveUrl)) { > > >> workbook.write(out); > > >> } catch (IOException e) { > > >> System.err.println(e.getMessage()); > > >> } > > >> > > >> > > >> The exception log is shown below. > > >> > > >> java.lang.NullPointerException > > >> at > > >> > > > org.apache.poi.poifs.filesystem.FilteringDirectoryNode$FilteringIterator.<init>(FilteringDirectoryNode.java:193) > > >> at > > >> > > > org.apache.poi.poifs.filesystem.FilteringDirectoryNode$FilteringIterator.<init>(FilteringDirectoryNode.java:188) > > >> at > > >> > > > org.apache.poi.poifs.filesystem.FilteringDirectoryNode.getEntries(FilteringDirectoryNode.java:101) > > >> at > > >> > > > org.apache.poi.poifs.filesystem.FilteringDirectoryNode.iterator(FilteringDirectoryNode.java:105) > > >> at > > >> > org.apache.poi.poifs.filesystem.EntryUtils.copyNodes(EntryUtils.java:71) > > >> at > > >> > org.apache.poi.hssf.usermodel.HSSFWorkbook.write(HSSFWorkbook.java:1407) > > >> at > > >> > org.apache.poi.hssf.usermodel.HSSFWorkbook.write(HSSFWorkbook.java:1375) > > >> at QuestionnaireExcel.writeExcelToLocal(QuestionnaireExcel.java:42) > > >> at Main.main(Main.java:18) > > >> > > >> The exception is the same as the url > > >> * > > > https://stackoverflow.com/questions/35654570/nullpointerexception-on-writing-excel-file-with-apache-poi > > >> < > > > https://stackoverflow.com/questions/35654570/nullpointerexception-on-writing-excel-file-with-apache-poi > > >.* > > >> > > >> I searched a lot on Google but didn't find a useful solution. Could > you > > >> give me some advice to solve it ? > > >> > > >> Thanks, > > >> Kevin > > >> > > > > > >
