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-
- /* ====================================================================
- Licensed to the Apache Software Foundation (ASF) under one or more
- contributor license agreements. See the NOTICE file distributed with
- this work for additional information regarding copyright ownership.
- The ASF licenses this file to You under the Apache License, Version 2.0
- (the "License"); you may not use this file except in compliance with
- the License. You may obtain a copy of the License at
-
- http://www.apache.org/licenses/LICENSE-2.0
-
- Unless required by applicable law or agreed to in writing, software
- distributed under the License is distributed on an "AS IS" BASIS,
- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- See the License for the specific language governing permissions and
- limitations under the License.
- ==================================================================== */
-
- package org.apache.poi.examples.hssf.usermodel;
-
- import java.io.FileInputStream;
- import java.io.IOException;
- import java.io.InputStream;
-
- import org.apache.poi.hssf.eventusermodel.HSSFEventFactory;
- import org.apache.poi.hssf.eventusermodel.HSSFListener;
- import org.apache.poi.hssf.eventusermodel.HSSFRequest;
- import org.apache.poi.hssf.record.BOFRecord;
- import org.apache.poi.hssf.record.BoundSheetRecord;
- import org.apache.poi.hssf.record.LabelSSTRecord;
- import org.apache.poi.hssf.record.NumberRecord;
- import org.apache.poi.hssf.record.RowRecord;
- import org.apache.poi.hssf.record.SSTRecord;
- import org.apache.poi.poifs.filesystem.POIFSFileSystem;
-
- /**
- * This example shows how to use the event API for reading a file.
- */
- @SuppressWarnings({"java:S106","java:S4823"})
- public class EventExample implements HSSFListener {
- private SSTRecord sstrec;
-
- /**
- * This method listens for incoming records and handles them as required.
- * @param record The record that was found while reading.
- */
- @Override
- public void processRecord(org.apache.poi.hssf.record.Record record)
- {
- switch (record.getSid())
- {
- // the BOFRecord can represent either the beginning of a sheet or the workbook
- case BOFRecord.sid:
- BOFRecord bof = (BOFRecord) record;
- if (bof.getType() == BOFRecord.TYPE_WORKBOOK)
- {
- System.out.println("Encountered workbook");
- // assigned to the class level member
- } else if (bof.getType() == BOFRecord.TYPE_WORKSHEET)
- {
- System.out.println("Encountered sheet reference");
- }
- break;
- case BoundSheetRecord.sid:
- BoundSheetRecord bsr = (BoundSheetRecord) record;
- System.out.println("New sheet named: " + bsr.getSheetname());
- break;
- case RowRecord.sid:
- RowRecord rowrec = (RowRecord) record;
- System.out.println("Row found, first column at "
- + rowrec.getFirstCol() + " last column at " + rowrec.getLastCol());
- break;
- case NumberRecord.sid:
- NumberRecord numrec = (NumberRecord) record;
- System.out.println("Cell found with value " + numrec.getValue()
- + " at row " + numrec.getRow() + " and column " + numrec.getColumn());
- break;
- // SSTRecords store a array of unique strings used in Excel.
- case SSTRecord.sid:
- sstrec = (SSTRecord) record;
- for (int k = 0; k < sstrec.getNumUniqueStrings(); k++)
- {
- System.out.println("String table value " + k + " = " + sstrec.getString(k));
- }
- break;
- case LabelSSTRecord.sid:
- LabelSSTRecord lrec = (LabelSSTRecord) record;
- System.out.println("String cell found with value "
- + sstrec.getString(lrec.getSSTIndex()));
- break;
- }
- }
-
- /**
- * Read an excel file and spit out what we find.
- *
- * @param args Expect one argument that is the file to read.
- * @throws IOException When there is an error processing the file.
- */
- public static void main(String[] args) throws IOException
- {
- // create a new file input stream with the input file specified
- // at the command line
- try (FileInputStream fin = new FileInputStream(args[0])) {
- // create a new org.apache.poi.poifs.filesystem.Filesystem
- try (POIFSFileSystem poifs = new POIFSFileSystem(fin)) {
- // get the Workbook (excel part) stream in a InputStream
- try (InputStream din = poifs.createDocumentInputStream("Workbook")) {
- // construct out HSSFRequest object
- HSSFRequest req = new HSSFRequest();
- // lazy listen for ALL records with the listener shown above
- req.addListenerForAllRecords(new EventExample());
- // create our event factory
- HSSFEventFactory factory = new HSSFEventFactory();
- // process our events based on the document input stream
- factory.processEvents(req, din);
- }
- }
- }
- System.out.println("done.");
- }
- }
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