xlsx转csv格式，修改自apache poi提供的转换类

<pre name="code" class="java">package com.lenovo.lstp.biac.utils; import java.io.BufferedOutputStream;import java.io.File;import java.io.FileOutputStream;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.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 XLSX2CSV {     /**     * 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     * <p/>     * Also see Standard ECMA-376, 1st edition, part 4, pages 1928ff, at     * http://www.ecma-international.org/publications/standards/Ecma-376.htm     * <p/>     * 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;        //private final String csvFilePath;         /**         * 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();        }                 public void startElement(String uri, String localName, String name,                                 Attributes attributes) throws SAXException {             if ("inlineStr".equals(name) || "v".equals(name)||"t".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);                }            }         }                 public void endElement(String uri, String localName, String name)                throws SAXException {             String thisStr = null;            String vs="";            // v => contents of a cell            if ("v".equals(name)||"t".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.                        vs=value.toString().replaceAll("\"", "“");                        thisStr = '"' + vs + '"';                        break;                     case INLINESTR:                        // TODO: have seen an example of this, so it's untested.                        XSSFRichTextString rtsi = new XSSFRichTextString(value.toString());                        vs=rtsi.toString().replaceAll("\"", "”");                        thisStr = '"' + vs + '"';                        break;                     case SSTINDEX:                        String sstIndex = value.toString();                        try {                            int idx = Integer.parseInt(sstIndex);                            XSSFRichTextString rtss = new XSSFRichTextString(sharedStringsTable.getEntryAt(idx));                            vs=rtss.toString().replaceAll("\"", "”");                            thisStr = '"' + vs + '"';                        }                        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 String fileName;    private String csvFilePath;       public XLSX2CSV(OPCPackage pkg, String csvFilePath, int minColumns,String fileName) {        this.xlsxPackage = pkg;        //this.output = output;        this.csvFilePath=csvFilePath;        this.minColumns = minColumns;        this.fileName=fileName;    }     /**     * 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,            String sheetFile)            throws IOException, ParserConfigurationException, SAXException {        PrintStream ps=new PrintStream(new BufferedOutputStream(new FileOutputStream(new File(sheetFile))),false,"UTF-8");        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,ps);        sheetParser.setContentHandler(handler);        sheetParser.parse(sheetSource);        ps.close();    }     /**     * 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();        while (iter.hasNext()) {            InputStream stream = iter.next();            String sheetNamePath = csvFilePath+File.separator+fileName+"_"+iter.getSheetName()+".csv";            processSheet(styles, strings, stream,sheetNamePath);            stream.close();        }    }     public static void main(String[] args) throws Exception {                 File xlsxFile = new File("D:\\home\\PH UsageA201502/内部库_销账.xlsx");        if (!xlsxFile.exists()) {            System.err.println("Not found or not a file: " + xlsxFile.getPath());            return;        }        int minColumns = -1;        OPCPackage p = OPCPackage.open(xlsxFile.getPath(), PackageAccess.READ);        XLSX2CSV xlsx2csv = new XLSX2CSV(p,"G:/sf",minColumns,xlsxFile.getName());        xlsx2csv.process();    } }