package com.xueyi.core.util;import java.io.IOException;import java.io.InputStream;import java.io.PrintStream;import javax.xml.parsers.ParserConfigurationException;import javax.xml.parsers.SAXParser;import javax.xml.parsers.SAXParserFactory;import org.apache.poi.openxml4j.exceptions.OpenXML4JException;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.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 XLSXTOCSV { /** * 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, } /** * Derived from http://poi.apache.org/spreadsheet/how-to.html#xssf_sax_api * * Also see Standard ECMA-376, 1st edition, part 4, pages 1928ff, at * http://www.ecma-international.org/publications/standards/Ecma-376.htm * * A web-friendly version is http://openiso.org/Ecma/376/Part4 */ 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(); } /* * (non-Javadoc) * * @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); } } } /* * (non-Javadoc) * * @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); // 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(); 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; private final String OUTPUT_CHARSET = "GBK"; /** * 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 XLSXTOCSV(OPCPackage pkg, PrintStream output, int minColumns) { this.xlsxPackage = pkg; this.output = output; this.minColumns = minColumns; } //TODO catch exceptions public XLSXTOCSV(String inputFilePath, String outputFilePath) throws Exception { xlsxPackage = OPCPackage.open(inputFilePath, PackageAccess.READ); output = new PrintStream(outputFilePath, OUTPUT_CHARSET); minColumns = -1; } /** * 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 IOException, OpenXML4JException, ParserConfigurationException, SAXException { 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; } } public static void main(String[] args) throws Exception { XLSXTOCSV xlsx2csv = new XLSXTOCSV("E:\\V5User\\Desktop\\test.xlsx","E:\\V5User\\Desktop\\out.csv"); xlsx2csv.process(); } } 上面的是xlsx转化为csv，下面是xls转化为csv
package com.xueyi.core.util;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.IOException;import java.io.PrintStream;import java.util.ArrayList;import org.apache.poi.hssf.eventusermodel.FormatTrackingHSSFListener;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.eventusermodel.MissingRecordAwareHSSFListener;import org.apache.poi.hssf.eventusermodel.EventWorkbookBuilder.SheetRecordCollectingListener;import org.apache.poi.hssf.eventusermodel.dummyrecord.LastCellOfRowDummyRecord;import org.apache.poi.hssf.eventusermodel.dummyrecord.MissingCellDummyRecord;import org.apache.poi.hssf.model.HSSFFormulaParser;import org.apache.poi.hssf.record.BOFRecord;import org.apache.poi.hssf.record.BlankRecord;import org.apache.poi.hssf.record.BoolErrRecord;import org.apache.poi.hssf.record.BoundSheetRecord;import org.apache.poi.hssf.record.FormulaRecord;import org.apache.poi.hssf.record.LabelRecord;import org.apache.poi.hssf.record.LabelSSTRecord;import org.apache.poi.hssf.record.NoteRecord;import org.apache.poi.hssf.record.NumberRecord;import org.apache.poi.hssf.record.RKRecord;import org.apache.poi.hssf.record.Record;import org.apache.poi.hssf.record.SSTRecord;import org.apache.poi.hssf.record.StringRecord;import org.apache.poi.hssf.usermodel.HSSFWorkbook;import org.apache.poi.poifs.filesystem.POIFSFileSystem;/** * A XLS -> CSV processor, that uses the MissingRecordAware EventModel code to * ensure it outputs all columns and rows. * * @author Nick Burch */public class XLSTOCSV implements HSSFListener { private int minColumns; private POIFSFileSystem fs; private PrintStream output; private int lastRowNumber; private int lastColumnNumber; /** Should we output the formula, or the value it has? */ private boolean outputFormulaValues = true; /** For parsing Formulas */ private SheetRecordCollectingListener workbookBuildingListener; private HSSFWorkbook stubWorkbook; // Records we pick up as we process private SSTRecord sstRecord; private FormatTrackingHSSFListener formatListener; /** So we known which sheet we're on */ private int sheetIndex = -1; private BoundSheetRecord[] orderedBSRs; private ArrayList boundSheetRecords = new ArrayList(); // For handling formulas with string results private int nextRow; private int nextColumn; private boolean outputNextStringRecord; private final String OUTPUT_CHARSET = "GBK"; /** * Creates a new XLS -> CSV converter * * @param fs * The POIFSFileSystem 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 XLSTOCSV(POIFSFileSystem fs, PrintStream output, int minColumns) { this.fs = fs; this.output = output; this.minColumns = minColumns; } public XLSTOCSV(String inputFilePath, String outputFilePath) throws Exception { fs = new POIFSFileSystem(new FileInputStream(inputFilePath)); output = new PrintStream(outputFilePath, OUTPUT_CHARSET); minColumns = -1; } /** * Creates a new XLS -> CSV converter * * @param filename * The file to process * @param minColumns * The minimum number of columns to output, or -1 for no minimum * @throws IOException * @throws FileNotFoundException */ public XLSTOCSV(String filename, int minColumns) throws IOException, FileNotFoundException { this(new POIFSFileSystem(new FileInputStream(filename)), System.out, minColumns); } /** * Initiates the processing of the XLS file to CSV */ public void process() throws IOException { MissingRecordAwareHSSFListener listener = new MissingRecordAwareHSSFListener( this); formatListener = new FormatTrackingHSSFListener(listener); HSSFEventFactory factory = new HSSFEventFactory(); HSSFRequest request = new HSSFRequest(); if (outputFormulaValues) { request.addListenerForAllRecords(formatListener); } else { workbookBuildingListener = new SheetRecordCollectingListener( formatListener); request.addListenerForAllRecords(workbookBuildingListener); } factory.processWorkbookEvents(request, fs); } /** * Main HSSFListener method, processes events, and outputs the CSV as the * file is processed. */ public void processRecord(Record record) { int thisRow = -1; int thisColumn = -1; String thisStr = null; switch (record.getSid()) { case BoundSheetRecord.sid: boundSheetRecords.add(record); break; case BOFRecord.sid: BOFRecord br = (BOFRecord) record; if (br.getType() == BOFRecord.TYPE_WORKSHEET) { // Create sub workbook if required if (workbookBuildingListener != null && stubWorkbook == null) { stubWorkbook = workbookBuildingListener .getStubHSSFWorkbook(); } // Output the worksheet name // Works by ordering the BSRs by the location of // their BOFRecords, and then knowing that we // process BOFRecords in byte offset order sheetIndex++; if (orderedBSRs == null) { orderedBSRs = BoundSheetRecord .orderByBofPosition(boundSheetRecords); } output.println(); output.println(orderedBSRs[sheetIndex].getSheetname() + " [" + (sheetIndex + 1) + "]:"); } break; case SSTRecord.sid: sstRecord = (SSTRecord) record; break; case BlankRecord.sid: BlankRecord brec = (BlankRecord) record; thisRow = brec.getRow(); thisColumn = brec.getColumn(); thisStr = ""; break; case BoolErrRecord.sid: BoolErrRecord berec = (BoolErrRecord) record; thisRow = berec.getRow(); thisColumn = berec.getColumn(); thisStr = ""; break; case FormulaRecord.sid: FormulaRecord frec = (FormulaRecord) record; thisRow = frec.getRow(); thisColumn = frec.getColumn(); if (outputFormulaValues) { if (Double.isNaN(frec.getValue())) { // Formula result is a string // This is stored in the next record outputNextStringRecord = true; nextRow = frec.getRow(); nextColumn = frec.getColumn(); } else { thisStr = formatListener.formatNumberDateCell(frec); } } else { thisStr = '"' + HSSFFormulaParser.toFormulaString(stubWorkbook, frec.getParsedExpression()) + '"'; } break; case StringRecord.sid: if (outputNextStringRecord) { // String for formula StringRecord srec = (StringRecord) record; thisStr = srec.getString(); thisRow = nextRow; thisColumn = nextColumn; outputNextStringRecord = false; } break; case LabelRecord.sid: LabelRecord lrec = (LabelRecord) record; thisRow = lrec.getRow(); thisColumn = lrec.getColumn(); thisStr = '"' + lrec.getValue() + '"'; break; case LabelSSTRecord.sid: LabelSSTRecord lsrec = (LabelSSTRecord) record; thisRow = lsrec.getRow(); thisColumn = lsrec.getColumn(); if (sstRecord == null) { thisStr = '"' + "(No SST Record, can't identify string)" + '"'; } else { thisStr = '"' + sstRecord.getString(lsrec.getSSTIndex()) .toString() + '"'; } break; case NoteRecord.sid: NoteRecord nrec = (NoteRecord) record; thisRow = nrec.getRow(); thisColumn = nrec.getColumn(); // TODO: Find object to match nrec.getShapeId() thisStr = '"' + "(TODO)" + '"'; break; case NumberRecord.sid: NumberRecord numrec = (NumberRecord) record; thisRow = numrec.getRow(); thisColumn = numrec.getColumn(); // Format thisStr = formatListener.formatNumberDateCell(numrec); break; case RKRecord.sid: RKRecord rkrec = (RKRecord) record; thisRow = rkrec.getRow(); thisColumn = rkrec.getColumn(); thisStr = '"' + "(TODO)" + '"'; break; default: break; } // Handle new row if (thisRow != -1 && thisRow != lastRowNumber) { lastColumnNumber = -1; } // Handle missing column if (record instanceof MissingCellDummyRecord) { MissingCellDummyRecord mc = (MissingCellDummyRecord) record; thisRow = mc.getRow(); thisColumn = mc.getColumn(); thisStr = ""; } // If we got something to print out, do so if (thisStr != null) { if (thisColumn > 0) { output.print(','); } output.print(thisStr); } // Update column and row count if (thisRow > -1) lastRowNumber = thisRow; if (thisColumn > -1) lastColumnNumber = thisColumn; // Handle end of row if (record instanceof LastCellOfRowDummyRecord) { // Print out any missing commas if needed if (minColumns > 0) { // Columns are 0 based if (lastColumnNumber == -1) { lastColumnNumber = 0; } for (int i = lastColumnNumber; i < (minColumns); i++) { output.print(','); } } // We're onto a new row lastColumnNumber = -1; // End the row output.println(); } } public static void main(String[] args) throws Exception { XLSTOCSV xls2csv = new XLSTOCSV("E:\\Desktop\\资讯管理-添加资讯.xls","E:\\Desktop\\out1.csv"); xls2csv.process(); }} 上面转载自
但是里面的代码粘贴麻烦，就给整理保留以下，main测试在下面，更改路径可以直接使用