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用Java将Excel的xls和xlsx文件转换成csv文件的方法, XLS2CSV, XLSX2CSV

时间:2017-06-30 15:28:16      阅读:4263      评论:0      收藏:0      [点我收藏+]

标签:后缀   sdi   park   tor   tco   调用   com   minimum   step   

利用poi将excel文件后缀为.xls .xlsx的文件转换成txt/csv文本文件

首先,引入所需的jar包:

 <dependencies>
 2        <dependency>
 3            <groupId>net.sf.opencsv</groupId>
 4            <artifactId>opencsv</artifactId>
 5            <version>2.1</version>
 6        </dependency>
 7        <dependency>
 8            <groupId>org.apache.poi</groupId>
 9            <artifactId>ooxml-schemas</artifactId>
10            <version>1.1</version>
11            <type>pom</type>
12        </dependency>
13        <dependency>
14            <groupId>org.apache.poi</groupId>
15            <artifactId>poi</artifactId>
16            <version>3.7</version>
17        </dependency>
18        <dependency>
19            <groupId>org.apache.poi</groupId>
20            <artifactId>ooxml-schemas</artifactId>
21            <version>1.1</version>
22        </dependency>
23        <dependency>
24            <groupId>org.apache.poi</groupId>
25            <artifactId>poi-ooxml</artifactId>
26            <version>3.7</version>
27        </dependency>
28        <dependency>
29            <groupId>dom4j</groupId>
30            <artifactId>dom4j</artifactId>
31            <version>1.6.1</version>
32        </dependency>
33    </dependencies>

  

  完整代码

import jxl.Cell;
import jxl.Sheet;
import jxl.Workbook;
import jxl.WorkbookSettings;

import java.io.*;
import java.util.Locale;

/**
 * @ClassName: ExcelToCsv
 * @Description:转换excel成csv格式
 * @Author: mashiwei

 */
public class ExcelToCsv {
    /**
    *将excel(xls/xlsx)转换成csv文件
    * @param excelFile
    * @param csvFile
    * @return String
    */
    public static String getCsv(String excelFile, String csvFile) {
        //.xlsx文件后缀转成csv
        if (excelFile.endsWith(".xlsx")){
            XLSX2CSV.trans(excelFile,csvFile);
            return csvFile;
        }
        //.xls文件后缀转成csv
        else {
            try {
                OutputStream os = new FileOutputStream(new File(csvFile));
                OutputStreamWriter osw = new OutputStreamWriter(os, "UTF8");
                BufferedWriter bw = new BufferedWriter(osw);
                // 载入Excel文件
                WorkbookSettings ws = new WorkbookSettings();
                ws.setLocale(new Locale("en", "EN"));
                Workbook wk = Workbook.getWorkbook(new File(excelFile), ws);
                // 从工作簿(workbook)取得每页(sheets)
                for (int sheet = 0; sheet < wk.getNumberOfSheets(); sheet++) {
                    Sheet s = wk.getSheet(sheet);
                    Cell[] row = null;
                    // 从每页(sheet)取得每个区块(Cell)
                    for (int i = 0; i < s.getRows(); i++) {
                        row = s.getRow(i);
                        if (row.length > 0) {
                            bw.write(row[0].getContents());
                            for (int j = 1; j < row.length; j++) {
                                //写入分隔符
                                bw.write(‘,‘);
                                bw.write(row[j].getContents());
                            }
                        }
                        bw.newLine();
                    }
                }
                bw.flush();
                bw.close();

            } catch (Exception e) {
                System.err.println(e.toString());
                e.printStackTrace();
            }
            return csvFile;
        }
    }
}

  

package com.ys.penspark.steps.excelinput;
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.*;
import org.xml.sax.helpers.DefaultHandler;

import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintStream;


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,
    }


    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;


        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)) {
                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;

            // 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() + ‘"‘;
                        thisStr = "\"ERROR:" + value.toString() + ‘"‘;
                        break;

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

        }


        public void characters(char[] ch, int start, int length)
                throws SAXException {
            if (vIsOpen)
                value.append(ch, start, length);
        }


        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 XLSX2CSV(OPCPackage pkg, PrintStream output, int minColumns) {
        this.xlsxPackage = pkg;
        this.output = output;
        this.minColumns = minColumns;
    }

    //TODO catch exceptions
    public XLSX2CSV(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);
    }


    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 trans(String fileInput,String fileOutput){

        XLSX2CSV xlsx2csv = null;
        try {
            xlsx2csv = new XLSX2CSV(fileInput, fileOutput);
        } catch (Exception e) {
            e.printStackTrace();
        }
        try {
            xlsx2csv.process();
        } catch (IOException e) {
            e.printStackTrace();
        } catch (OpenXML4JException e) {
            e.printStackTrace();
        } catch (ParserConfigurationException e) {
            e.printStackTrace();
        } catch (SAXException e) {
            e.printStackTrace();
        }
    }

}

  调用

ExcelToCsv.getCsv("input", "output");

  

用Java将Excel的xls和xlsx文件转换成csv文件的方法, XLS2CSV, XLSX2CSV

标签:后缀   sdi   park   tor   tco   调用   com   minimum   step   

原文地址:http://www.cnblogs.com/xiaoma0529/p/7098518.html

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