poi3.9 读取excel 2007 sax


package com.h3c.oos.util;

import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintStream;
import java.sql.PreparedStatement;
import java.util.ArrayList;
import java.util.List;

import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;

import org.apache.poi.openxml4j.opc.OPCPackage;
import org.apache.poi.openxml4j.opc.PackageAccess;
import org.apache.poi.ss.usermodel.BuiltinFormats;
import org.apache.poi.ss.usermodel.DataFormatter;
import org.apache.poi.xssf.eventusermodel.ReadOnlySharedStringsTable;
import org.apache.poi.xssf.eventusermodel.XSSFReader;
import org.apache.poi.xssf.model.StylesTable;
import org.apache.poi.xssf.usermodel.XSSFCellStyle;
import org.apache.poi.xssf.usermodel.XSSFRichTextString;
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;

/**
*
*/
public class ReaderEcxel {

// The type of the data value is indicated by an attribute on the cell.
// The value is usually in a "v" element within the cell.
enum xssfDataType {
BOOL, ERROR, FORMULA, INLINESTR, SSTINDEX, NUMBER,
}

int countrows = 0;

private List<String> list = new ArrayList<String>();
private List<String> listException = new ArrayList<String>();

class MyXSSFSheetHandler extends DefaultHandler {

// Table with styles
private StylesTable stylesTable;

// Table with unique strings
private ReadOnlySharedStringsTable sharedStringsTable;

// Destination for data
private final PrintStream output;

// Number of columns to read starting with leftmost
private final int minColumnCount;

// Set when V start element is seen
private boolean vIsOpen;

// Set when cell start element is seen;
// used when cell close element is seen.
private xssfDataType nextDataType;

// Used to format numeric cell values.
private short formatIndex;
private String formatString;
private final DataFormatter formatter;

private int thisColumn = -1;
// The last column printed to the output stream
private int lastColumnNumber = -1;

// Gathers characters as they are seen.
private StringBuffer value;

// Accepts objects needed while parsing.
// @param styles Table of styles
// @param strings Table of shared strings
// @param cols Minimum number of columns to show
// @param target Sink for output
public MyXSSFSheetHandler(StylesTable styles,
ReadOnlySharedStringsTable strings, int cols, PrintStream target) {
this.stylesTable = styles;
this.sharedStringsTable = strings;
this.minColumnCount = cols;
this.output = target;
this.value = new StringBuffer();
this.nextDataType = xssfDataType.NUMBER;
this.formatter = new DataFormatter();
}

// @see
// org.xml.sax.helpers.DefaultHandler#startElement(java.lang.String,
// java.lang.String, java.lang.String, org.xml.sax.Attributes)
public void startElement(String uri, String localName, String name,
Attributes attributes) throws SAXException {

if ("inlineStr".equals(name) || "v".equals(name)) {
vIsOpen = true;
// Clear contents cache
value.setLength(0);
}
// c => cell
else if ("c".equals(name)) {
// Get the cell reference
String r = attributes.getValue("r");
int firstDigit = -1;
for (int c = 0; c < r.length(); ++c) {
if (Character.isDigit(r.charAt(c))) {
firstDigit = c;
break;
}
}
thisColumn = nameToColumn(r.substring(0, firstDigit));

// Set up defaults.
this.nextDataType = xssfDataType.NUMBER;
this.formatIndex = -1;
this.formatString = null;
String cellType = attributes.getValue("t");
String cellStyleStr = attributes.getValue("s");
if ("b".equals(cellType))
nextDataType = xssfDataType.BOOL;
else if ("e".equals(cellType))
nextDataType = xssfDataType.ERROR;
else if ("inlineStr".equals(cellType))
nextDataType = xssfDataType.INLINESTR;
else if ("s".equals(cellType))
nextDataType = xssfDataType.SSTINDEX;
else if ("str".equals(cellType))
nextDataType = xssfDataType.FORMULA;
else if (cellStyleStr != null) {
// It's a number, but almost certainly one
// with a special style or format
int styleIndex = Integer.parseInt(cellStyleStr);
XSSFCellStyle style = stylesTable.getStyleAt(styleIndex);
this.formatIndex = style.getDataFormat();
this.formatString = style.getDataFormatString();
if (this.formatString == null)
this.formatString = BuiltinFormats
.getBuiltinFormat(this.formatIndex);
}
}

}

// @see org.xml.sax.helpers.DefaultHandler#endElement(java.lang.String,
// java.lang.String, java.lang.String)
public void endElement(String uri, String localName, String name)
throws SAXException {

String thisStr = null;

// v => contents of a cell
if ("v".equals(name)) {
// Process the value contents as required.
// Do now, as characters() may be called more than once
switch (nextDataType) {

case BOOL:
char first = value.charAt(0);
thisStr = first == '0' ? "FALSE" : "TRUE";
break;

case ERROR:
thisStr = "\"ERROR:" + value.toString() + '"';
break;

case FORMULA:
// A formula could result in a string value,
// so always add double-quote characters.
thisStr = value.toString();
break;

case INLINESTR:
// TODO: have seen an example of this, so it's untested.
XSSFRichTextString rtsi = new XSSFRichTextString(value
.toString());
thisStr = rtsi.toString();
break;

case SSTINDEX:
String sstIndex = value.toString();
try {
int idx = Integer.parseInt(sstIndex);
XSSFRichTextString rtss = new XSSFRichTextString(
sharedStringsTable.getEntryAt(idx));
thisStr = rtss.toString();
} catch (NumberFormatException ex) {
output.println("Failed to parse SST index '" + sstIndex
+ "': " + ex.toString());
}
break;

case NUMBER:
String n = value.toString();
if (this.formatString != null)
thisStr = formatter.formatRawCellContents(Double
.parseDouble(n), this.formatIndex,
this.formatString);
else
thisStr = n;
break;

default:
thisStr = "(TODO: Unexpected type: " + nextDataType + ")";
break;
}

// Output after we've seen the string contents
// Emit commas for any fields that were missing on this row
if (lastColumnNumber == -1) {
lastColumnNumber = 0;
}
for (int i = lastColumnNumber; i < thisColumn; ++i) {
output.print(',');
}

// Might be the empty string.
output.print(thisStr);
if ("".equals(thisStr)) {
thisStr = "N/A";
}
list.add(thisStr);
// Update column
if (thisColumn > -1) {
lastColumnNumber = thisColumn;
}

} else if ("row".equals(name)) {

// Print out any missing commas if needed
if (minColumns > 0) {
// Columns are 0 based
if (lastColumnNumber == -1) {
lastColumnNumber = 0;
}
for (int i = lastColumnNumber; i < (this.minColumnCount); i++) {
output.print(',');
}
}

// We're onto a new row

output.println();
output.println(countrows++);
lastColumnNumber = -1;
}

}

// Captures characters only if a suitable element is open.
// Originally was just "v"; extended for inlineStr also.
public void characters(char[] ch, int start, int length)
throws SAXException {
if (vIsOpen)
value.append(ch, start, length);
}

// Converts an Excel column name like "C" to a zero-based index.
// @param name
// @return Index corresponding to the specified name
private int nameToColumn(String name) {
int column = -1;
for (int i = 0; i < name.length(); ++i) {
int c = name.charAt(i);
column = (column + 1) * 26 + c - 'A';
}
return column;
}

}

// /////////////////////////////////////

private OPCPackage xlsxPackage;
private int minColumns;
private PrintStream output;

// Creates a new XLSX -> CSV converter
// @param pkg The XLSX package to process
// @param output The PrintStream to output the CSV to
// @param minColumns The minimum number of columns to output, or -1 for no
// minimum
public ReaderEcxel(OPCPackage pkg, PrintStream output, int minColumns) {
this.xlsxPackage = pkg;
this.output = output;
this.minColumns = minColumns;
}

// Parses and shows the content of one sheet
// using the specified styles and shared-strings tables.
// @param styles
// @param strings
// @param sheetInputStream
public void processSheet(StylesTable styles,
ReadOnlySharedStringsTable strings, InputStream sheetInputStream)
throws IOException, ParserConfigurationException, SAXException {

InputSource sheetSource = new InputSource(sheetInputStream);
SAXParserFactory saxFactory = SAXParserFactory.newInstance();
SAXParser saxParser = saxFactory.newSAXParser();
XMLReader sheetParser = saxParser.getXMLReader();
ContentHandler handler = new MyXSSFSheetHandler(styles, strings,
this.minColumns, this.output);
sheetParser.setContentHandler(handler);
sheetParser.parse(sheetSource);
}

// Initiates the processing of the XLS workbook file to CSV.
// @throws IOException
// @throws OpenXML4JException
// @throws ParserConfigurationException
// @throws SAXException

public void process() throws Exception {

ReadOnlySharedStringsTable strings = new ReadOnlySharedStringsTable(
this.xlsxPackage);
XSSFReader xssfReader = new XSSFReader(this.xlsxPackage);

StylesTable styles = xssfReader.getStylesTable();

XSSFReader.SheetIterator iter = (XSSFReader.SheetIterator) xssfReader
.getSheetsData();
int index = 0;
while (iter.hasNext()) {
InputStream stream = iter.next();
String sheetName = iter.getSheetName();
this.output.println();
this.output.println(sheetName + " [index=" + index + "]:");
processSheet(styles, strings, stream);
stream.close();
++index;
break;
}

}

public static void main(String[] args) throws Exception {

// File xlsxFile = new File(args[0]);
File xlsxFile = new File("C:/Users/zkf4583/develp/1.xlsx");
if (!xlsxFile.exists()) {
System.err
.println("Not found or not a file: " + xlsxFile.getPath());
return;
}

int minColumns = -1;
// if (args.length >= 2)
// minColumns = Integer.parseInt(args[1]);

// minColumns = 0;
// The package open is instantaneous, as it should be.
OPCPackage p = OPCPackage.open(xlsxFile.getPath(), PackageAccess.READ);
ReaderEcxel xlsx2csv = new ReaderEcxel(p, System.out, minColumns);
xlsx2csv.process();
}

public List processReaderSheet(OPCPackage pkg) throws Exception {

ReaderEcxel xlsx2csv = new ReaderEcxel(pkg, System.out, -1);
xlsx2csv.process();

return list;

}
}

 

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