Thanks again for an extremely good answere. This time however i got a
devestating error :)
Exception in thread "main" java.lang.IllegalArgumentException: Your
InputStream was neither an OLE2 stream, nor an OOXML stream
at
org.apache.poi.ss.usermodel.WorkbookFactory.create(WorkbookFactory.java:65)
at lasxls.dataExtract.displayCellContents(dataExtract.java:56)
at lasxls.Main.main(Main.java:20)
This is strange, the datasource im trying to use is from this link
http://www.nasdaqomxnordic.com/aktier/Historiska_kurser/?languageId=1&Instrument=SSE366
It is the Excel icon next to the search botton to download the
hirstorical data. Is this not XLS???
MSB skrev:
You need to add additional archives - .jar files - to your classpath. This is
old code that I have not refactored yet so the list of archives below
relates to an earlier version of POI but you can use it as a guide for the
similar components from the latest version;
poi-3.5-beta7-20090612.jar
poi-ooxml-3.5-beta7-20090613.jar
openxml4j-1.0-beta.jar
xmlbeans-2.3.0.jar
ooxml-schemas-1.0.jar
dom4j-1.6.1.jar
The exact names of the files will have changed now that the developers are
working on 3.6, but they will still be very similar and if you do not
already have these archives, you will need to visit the torchbox address I
posted in an earlier response, search thruogh the list of archives there and
download those whose names are similar to the above. I have just had a quick
check and it seems these are the current versions;
poi-3.6-beta1-20091006.jar
poi-ooxml-3.6-beta1-20091006.jar
and the current versions of the other files listed should be in this zip
file
poi-dependencies-3.6-beta1-20091006.zip
that you can download and then unzip into a directory.
Once you have the archives, add them to your classpath and you should be
able to both compile and run the code.
Hope that helps. If you have any other problems, just post to the list. Just
as an aside, do not worry about the beta designation for the archives. Yegor
and the other developers ensure that the product is stable and 3.6 beta will
be 3.5 final with the latest fixes and patches added; do not worry that you
will be using some buggy patched nightmare because this would simply not be
allowed to happen.
Yours
Mark B
Henrik-23 wrote:
I get this error:
Exception in thread "main" java.lang.NoClassDefFoundError:
org/apache/xmlbeans/XmlOptions
at
org.apache.poi.POIXMLDocumentPart.<clinit>(POIXMLDocumentPart.java:43)
at
org.apache.poi.ss.usermodel.WorkbookFactory.create(WorkbookFactory.java:62)
at lasxls.dataExtract.displayCellContents(dataExtract.java:56)
at lasxls.Main.main(Main.java:20)
Caused by: java.lang.ClassNotFoundException:
org.apache.xmlbeans.XmlOptions
at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)
... 4 more
Java Result: 1
BUILD SUCCESSFUL (total time: 1 second)
This is my main class.
public class Main {
/**
* @param args the command line arguments
*/
public static void main(String[] args) {
// TODO code application logic here
dataExtract ins = new dataExtract();
ins.displayCellContents("E:/1_Trading/Java/LasXLS/Volvo.xls");
}
}
MSB skrev:
Had the chance to play with some code this evening and I have imporved
the
snippet I posted earlier so that it now outputs the cells address in
familar
Excel notation - eg A1. Alsom I noticed when I ran it against a
problematic
test file that an exception could be thrown when the test was made to see
if
the cell was date formatted and so I have added a catch clause to solve
this
problem because I could not see what the problem was;
public static void displayCellContents(String filename) {
File file = null;
FileInputStream fis = null;
Workbook workbook = null;
Sheet sheet = null;
Row row = null;
Cell cell = null;
int numSheets = 0;
Iterator<Row> rowIter = null;
Iterator<Cell> cellIter = null;
CellReference cellRef = null;
try {
// Open the workbook.
file = new File(filename);
fis = new FileInputStream(file);
workbook = WorkbookFactory.create(fis);
// Get the number of sheets in the workbook and enter a for
loop
// to iterate through them one at a time.
numSheets = workbook.getNumberOfSheets();
for(int i = 0; i < numSheets; i++) {
// Get the sheet and recover from that an iterator that
// allows us to step through all of the rows the sheet
contains.
sheet = workbook.getSheetAt(i);
rowIter = sheet.rowIterator();
while(rowIter.hasNext()) {
// Get a row and recover from it an Iterator that
allows
// us to access each of the cells on the row.
row = rowIter.next();
cellIter = row.cellIterator();
while(cellIter.hasNext()) {
// Get a cell
cell = cellIter.next();
// The CellReference object must be created for
each
cell and used
// to convert POI's indices into Excel's
co-ordinate
system.
cellRef = new CellReference(row.getRowNum(),
cell.getColumnIndex());
System.out.print("Cell " +
cellRef.formatAsString()
+ " ");
switch(cell.getCellType()) {
case Cell.CELL_TYPE_BLANK:
System.out.println("is blank.");
break;
case Cell.CELL_TYPE_BOOLEAN:
System.out.println("contains a boolean
value
of: " +
cell.getBooleanCellValue());
break;
case Cell.CELL_TYPE_ERROR:
System.out.println("contains an error
code
of: " +
cell.getErrorCellValue());
break;
case Cell.CELL_TYPE_FORMULA:
System.out.println("contains a formula: "
+
cell.getCellFormula());
break;
case Cell.CELL_TYPE_NUMERIC:
try {
if(DateUtil.isCellDateFormatted(cell)) {
System.out.println("contains a
date:
" +
cell.getDateCellValue());
}
else {
System.out.println("contains a
number: " +
cell.getNumericCellValue());
}
}
catch(IndexOutOfBoundsException iobEx) {
System.out.println("an exception was
thrown " +
"checking the date
formatting. "
+
"The cell contains the
following
" +
"numeric value: " +
cell.getNumericCellValue());
}
break;
case Cell.CELL_TYPE_STRING:
System.out.println("contains a String: "
+
cell.getStringCellValue());
break;
}
}
}
}
}
catch(FileNotFoundException fnfEx) {
System.out.println("Caught: " + fnfEx.getClass().getName());
System.out.println("Message: " + fnfEx.getMessage());
System.out.println("Stacktrace follows..............");
fnfEx.printStackTrace(System.out);
}
catch(IOException ioEx) {
System.out.println("Caught: " + ioEx.getClass().getName());
System.out.println("Message: " + ioEx.getMessage());
System.out.println("Stacktrace follows..............");
ioEx.printStackTrace(System.out);
}
catch(InvalidFormatException invFEx) {
System.out.println("Caught: " + invFEx.getClass().getName());
System.out.println("Message: " + invFEx.getMessage());
System.out.println("Stacktrace follows..............");
invFEx.printStackTrace(System.out);
}
finally {
if(fis != null) {
try {
fis.close();
fis = null;
}
catch(IOException ioEx) {
// I G N O R E
}
}
}
}
Whilst this example uses Iterator to get at the cells, you are not forced
to
do this, it is possible to get at a cell be specifying the index number
of
the row and column. This would allow you to write some code that steps
down
each column rather than along each row to retrieve a reference to a cell.
The changes to the code I have posted would be quite trivial and it might
be
worth you time seeing if you can modify what I have written to use
indices
rather than iterators. Simply write code that discovers how many rows
there
are on the sheet then enter a for loo to step through each row at a time.
Within that loop, find out how many cells there are in the row and then
write another for loop to get each cell in turn and output it's contents
to
standard output. That will help you to see how the API hangs together
IMO.
As always, if you have any questions, just post to this list.
Yours
Mark B
Henrik-23 wrote:
I have been trying to make a very simpe Java program, the only advanced
part is the part using HSSF to read an xls file and get all the data.
What i want to do i ittretare thru ever colum on every row and just
print that data out in the comand prompt. I have found lots of example
of this on the homepage but no whole code that realy works. They all
seems to need something more to get them to run. It would be very much
appriciated if someone just could point me in the right direction to get
this working.
Best regards Henrik
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