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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.xssf.eventusermodel.examples;
-
- import java.io.InputStream;
- import java.util.Iterator;
-
- import org.apache.poi.xssf.eventusermodel.XSSFReader;
- import org.apache.poi.xssf.model.SharedStringsTable;
- import org.apache.poi.xssf.usermodel.XSSFRichTextString;
- import org.apache.poi.openxml4j.opc.OPCPackage;
- import org.xml.sax.Attributes;
- import org.xml.sax.ContentHandler;
- import org.xml.sax.InputSource;
- import org.xml.sax.SAXException;
- import org.xml.sax.XMLReader;
- import org.xml.sax.helpers.DefaultHandler;
- import org.xml.sax.helpers.XMLReaderFactory;
-
- /**
- * XSSF and SAX (Event API)
- */
- public class FromHowTo {
- public void processOneSheet(String filename) throws Exception {
- OPCPackage pkg = OPCPackage.open(filename);
- XSSFReader r = new XSSFReader( pkg );
- SharedStringsTable sst = r.getSharedStringsTable();
-
- XMLReader parser = fetchSheetParser(sst);
-
- // rId2 found by processing the Workbook
- // Seems to either be rId# or rSheet#
- InputStream sheet2 = r.getSheet("rId2");
- InputSource sheetSource = new InputSource(sheet2);
- parser.parse(sheetSource);
- sheet2.close();
- }
-
- public void processAllSheets(String filename) throws Exception {
- OPCPackage pkg = OPCPackage.open(filename);
- XSSFReader r = new XSSFReader( pkg );
- SharedStringsTable sst = r.getSharedStringsTable();
-
- XMLReader parser = fetchSheetParser(sst);
-
- Iterator<InputStream> sheets = r.getSheetsData();
- while(sheets.hasNext()) {
- System.out.println("Processing new sheet:\n");
- InputStream sheet = sheets.next();
- InputSource sheetSource = new InputSource(sheet);
- parser.parse(sheetSource);
- sheet.close();
- System.out.println("");
- }
- }
-
- public XMLReader fetchSheetParser(SharedStringsTable sst) throws SAXException {
- XMLReader parser =
- XMLReaderFactory.createXMLReader(
- "org.apache.xerces.parsers.SAXParser"
- );
- ContentHandler handler = new SheetHandler(sst);
- parser.setContentHandler(handler);
- return parser;
- }
-
- /**
- * See org.xml.sax.helpers.DefaultHandler javadocs
- */
- private static class SheetHandler extends DefaultHandler {
- private SharedStringsTable sst;
- private String lastContents;
- private boolean nextIsString;
-
- private SheetHandler(SharedStringsTable sst) {
- this.sst = sst;
- }
-
- public void startElement(String uri, String localName, String name,
- Attributes attributes) throws SAXException {
- // c => cell
- if(name.equals("c")) {
- // Print the cell reference
- System.out.print(attributes.getValue("r") + " - ");
- // Figure out if the value is an index in the SST
- String cellType = attributes.getValue("t");
- if(cellType != null && cellType.equals("s")) {
- nextIsString = true;
- } else {
- nextIsString = false;
- }
- }
- // Clear contents cache
- lastContents = "";
- }
-
- public void endElement(String uri, String localName, String name)
- throws SAXException {
- // Process the last contents as required.
- // Do now, as characters() may be called more than once
- if(nextIsString) {
- int idx = Integer.parseInt(lastContents);
- lastContents = new XSSFRichTextString(sst.getEntryAt(idx)).toString();
- nextIsString = false;
- }
-
- // v => contents of a cell
- // Output after we've seen the string contents
- if(name.equals("v")) {
- System.out.println(lastContents);
- }
- }
-
- public void characters(char[] ch, int start, int length)
- throws SAXException {
- lastContents += new String(ch, start, length);
- }
- }
-
- public static void main(String[] args) throws Exception {
- FromHowTo howto = new FromHowTo();
- howto.processOneSheet(args[0]);
- howto.processAllSheets(args[0]);
- }
- }
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