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如何創建和寫入 Excel 文件 (.xlsx)？

[英]How to create and write to Excel file (.xlsx)?

 原文  2018-06-07 09:46:51  6   9    java/ android/ excel

問題描述

Java 開發人員的庫中有大量在 Android 上不起作用的方法。

我從使用 OpenCSV 之類的庫開始，但不幸的是 Excel 在打開 CSV 文件時存在已知問題。

然后我嘗試使用：

  • Apache POI - 它肯定有太多的方法。
  • JExcelAPI - 它有效，但僅適用於舊的二進制 .xls 文件。
  • docx4j - jar 太多了，因為它是基於 JAXB 的，它不包含在 Android 中。

我的問題是，如何在 Android 上創建一個簡單的 .xlsx 格式的 Excel 文件，而不超過 65k 方法？

9 個解決方案

解決方案1
 16  2018-06-09 18:21:54

第一個答案：在服務器端做。

如果這不可能，只需使用 JExecelAPI - 幾乎所有讀取 xlsx 文件的東西也都會讀取 xls 文件。

其他所有 Excel 庫都會變得太大。

另一個想法 - 手動或使用許多可用的 csv 庫之一編寫 csv 文件。 同樣，大多數讀取 Excel 文件的應用程序也讀取 csv 文件。

解決方案2
 15  2018-06-16 09:06:31

由於這個問題似乎是：“為 Excel ( *.xlsx ) 創建 Office Open XML 文件的最輕量級方法是什么？”，我將提供一個示例，它不需要任何庫，除了默認的java.lang ， java.io和java.util.zip 。

*.xlsx文件只不過是包含 XML 文件和目錄結構中的其他文件的 ZIP 存檔。 因此，我們所需要的只是創建、讀取和寫入 ZIP 存檔以及創建、讀取和寫入 XML 文件的可能性。 對於 ZIP 部分，我使用java.util.zip ，對於 XML 部分，我使用字符串操作。 這種通過字符串操作創建和操作 XML 並不是最推薦的操作 XML 的方法，但它是最輕量級的方法，因為它不需要任何額外的 XML 庫。

完整示例：

import java.io.OutputStream;
import java.io.ByteArrayOutputStream;

import java.util.zip.*;

public class CreateXLSXFromScratch {

 //some static parts of the XLSX file:

 static String content_types_xml = "<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\"?><Types xmlns=\"http://schemas.openxmlformats.org/package/2006/content-types\"><Default ContentType=\"application/vnd.openxmlformats-package.relationships+xml\" Extension=\"rels\"/><Default ContentType=\"application/xml\" Extension=\"xml\"/><Override ContentType=\"application/vnd.openxmlformats-officedocument.extended-properties+xml\" PartName=\"/docProps/app.xml\"/><Override ContentType=\"application/vnd.openxmlformats-package.core-properties+xml\" PartName=\"/docProps/core.xml\"/><Override ContentType=\"application/vnd.openxmlformats-officedocument.spreadsheetml.sharedStrings+xml\" PartName=\"/xl/sharedStrings.xml\"/><Override ContentType=\"application/vnd.openxmlformats-officedocument.spreadsheetml.styles+xml\" PartName=\"/xl/styles.xml\"/><Override ContentType=\"application/vnd.openxmlformats-officedocument.spreadsheetml.sheet.main+xml\" PartName=\"/xl/workbook.xml\"/><Override ContentType=\"application/vnd.openxmlformats-officedocument.spreadsheetml.worksheet+xml\" PartName=\"/xl/worksheets/sheet1.xml\"/></Types>";

 static String docProps_app_xml = "<?xml version=\"1.0\" encoding=\"UTF-8\"?><Properties xmlns=\"http://schemas.openxmlformats.org/officeDocument/2006/extended-properties\"><Application>" + "Created Low level From Scratch" + "</Application></Properties>";

 static String docProps_core_xml = "<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\"?><cp:coreProperties xmlns:cp=\"http://schemas.openxmlformats.org/package/2006/metadata/core-properties\" xmlns:dc=\"http://purl.org/dc/elements/1.1/\" xmlns:dcterms=\"http://purl.org/dc/terms/\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"><dcterms:created xsi:type=\"dcterms:W3CDTF\">" + java.time.Instant.now().truncatedTo(java.time.temporal.ChronoUnit.SECONDS).toString() + "</dcterms:created><dc:creator>" + "Axel Richter from scratch" + "</dc:creator></cp:coreProperties>";

 static String _rels_rels_xml  = "<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\"?><Relationships xmlns=\"http://schemas.openxmlformats.org/package/2006/relationships\"><Relationship Id=\"rId1\" Target=\"xl/workbook.xml\" Type=\"http://schemas.openxmlformats.org/officeDocument/2006/relationships/officeDocument\"/><Relationship Id=\"rId2\" Target=\"docProps/app.xml\" Type=\"http://schemas.openxmlformats.org/officeDocument/2006/relationships/extended-properties\"/><Relationship Id=\"rId3\" Target=\"docProps/core.xml\" Type=\"http://schemas.openxmlformats.org/package/2006/relationships/metadata/core-properties\"/></Relationships>";

 static String xl_rels_workbook_xml_rels_xml = "<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\"?><Relationships xmlns=\"http://schemas.openxmlformats.org/package/2006/relationships\"><Relationship Id=\"rId1\" Target=\"sharedStrings.xml\" Type=\"http://schemas.openxmlformats.org/officeDocument/2006/relationships/sharedStrings\"/><Relationship Id=\"rId2\" Target=\"styles.xml\" Type=\"http://schemas.openxmlformats.org/officeDocument/2006/relationships/styles\"/><Relationship Id=\"rId3\" Target=\"worksheets/sheet1.xml\" Type=\"http://schemas.openxmlformats.org/officeDocument/2006/relationships/worksheet\"/></Relationships>";

 static String xl_sharedstrings_xml = "<?xml version=\"1.0\" encoding=\"UTF-8\"?><sst count=\"0\" uniqueCount=\"0\" xmlns=\"http://schemas.openxmlformats.org/spreadsheetml/2006/main\"/>"; 

 static String xl_styles_xml = "<?xml version=\"1.0\" encoding=\"UTF-8\"?><styleSheet xmlns=\"http://schemas.openxmlformats.org/spreadsheetml/2006/main\"><numFmts count=\"0\"/><fonts count=\"1\"><font><sz val=\"11.0\"/><color indexed=\"8\"/><name val=\"Calibri\"/><family val=\"2\"/><scheme val=\"minor\"/></font></fonts><fills count=\"2\"><fill><patternFill patternType=\"none\"/></fill><fill><patternFill patternType=\"darkGray\"/></fill></fills><borders count=\"1\"><border><left/><right/><top/><bottom/><diagonal/></border></borders><cellStyleXfs count=\"1\"><xf numFmtId=\"0\" fontId=\"0\" fillId=\"0\" borderId=\"0\"/></cellStyleXfs><cellXfs count=\"1\"><xf numFmtId=\"0\" fontId=\"0\" fillId=\"0\" borderId=\"0\" xfId=\"0\"/></cellXfs></styleSheet>";

 static String xl_workbook_xml = "<?xml version=\"1.0\" encoding=\"UTF-8\"?><workbook xmlns=\"http://schemas.openxmlformats.org/spreadsheetml/2006/main\" xmlns:r=\"http://schemas.openxmlformats.org/officeDocument/2006/relationships\"><workbookPr date1904=\"false\"/><bookViews><workbookView activeTab=\"0\"/></bookViews><sheets><sheet name=\"" + "Sheet1" + "\" r:id=\"rId3\" sheetId=\"1\"/></sheets></workbook>";

 static String xl_worksheets_sheet1_xml = "<?xml version=\"1.0\" encoding=\"UTF-8\"?><worksheet xmlns=\"http://schemas.openxmlformats.org/spreadsheetml/2006/main\"><dimension ref=\"A1\"/><sheetViews><sheetView workbookViewId=\"0\" tabSelected=\"true\"/></sheetViews><sheetFormatPr defaultRowHeight=\"15.0\"/><sheetData/><pageMargins bottom=\"0.75\" footer=\"0.3\" header=\"0.3\" left=\"0.7\" right=\"0.7\" top=\"0.75\"/></worksheet>";

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

  // result goes into a ByteArrayOutputStream
  ByteArrayOutputStream resultout = new ByteArrayOutputStream();

  // needed objects
  ZipEntry zipentry = null;
  byte[] data = null;

  // create ZipOutputStream
  ZipOutputStream zipout = new ZipOutputStream(resultout);

  // create the static parts of the XLSX ZIP file:

  zipentry = new ZipEntry("[Content_Types].xml");
  zipout.putNextEntry(zipentry);
  data = content_types_xml.getBytes();
  zipout.write(data, 0, data.length);
  zipout.closeEntry();

  zipentry = new ZipEntry("docProps/app.xml");
  zipout.putNextEntry(zipentry);
  data = docProps_app_xml.getBytes();
  zipout.write(data, 0, data.length);
  zipout.closeEntry();

  zipentry = new ZipEntry("docProps/core.xml");
  zipout.putNextEntry(zipentry);
  data = docProps_core_xml.getBytes();
  zipout.write(data, 0, data.length);
  zipout.closeEntry();

  zipentry = new ZipEntry("_rels/.rels");
  zipout.putNextEntry(zipentry);
  data = _rels_rels_xml.getBytes();
  zipout.write(data, 0, data.length);
  zipout.closeEntry();

  zipentry = new ZipEntry("xl/_rels/workbook.xml.rels");
  zipout.putNextEntry(zipentry);
  data = xl_rels_workbook_xml_rels_xml.getBytes();
  zipout.write(data, 0, data.length);
  zipout.closeEntry();

  zipentry = new ZipEntry("xl/sharedStrings.xml");
  zipout.putNextEntry(zipentry);
  data = xl_sharedstrings_xml.getBytes();
  zipout.write(data, 0, data.length);
  zipout.closeEntry();

  zipentry = new ZipEntry("xl/styles.xml");
  zipout.putNextEntry(zipentry);
  data = xl_styles_xml.getBytes();
  zipout.write(data, 0, data.length);
  zipout.closeEntry();

  zipentry = new ZipEntry("xl/workbook.xml");
  zipout.putNextEntry(zipentry);
  data = xl_workbook_xml.getBytes();
  zipout.write(data, 0, data.length);
  zipout.closeEntry();

  // preparing the sheet data:

  Object[][] sheetData = new Object[][] {
   {"Text", "Value", "Formula"},
   {"Text1", 1.23456, "=SIN(B2)"},
   {"Text2", 2.34567, "=SQRT(B3)"},
   {"Text3", 123.456, "=B4/10"}
  };
  String sheetdata = "<sheetData>";
  int r = 0;
  char c = 'A'; --c;
  for (Object[] rowData : sheetData) {
   sheetdata += "<row r=\"" + ++r + "\">";
   c = 'A'; --c;
   for (Object cellData : rowData) {
    sheetdata += "<c r=\"" + Character.toString(++c) + r + "\"";
    if (cellData instanceof String && ((String)cellData).startsWith("=")) {
     sheetdata += "><f>" + ((String)cellData).replace("=", "") + "</f></c>";
    } else if (cellData instanceof String) {
     sheetdata += " t=\"inlineStr\"><is><t>" + ((String)cellData) + "</t></is></c>";
    } else if (cellData instanceof Double) {
     sheetdata += "><v>" + ((Double)cellData) + "</v></c>";
    }
   }
   sheetdata += "</row>";
  }
  sheetdata += "</sheetData>";

  // get the static sheet xml into a buffer for further processing
  StringBuffer xl_worksheets_sheet1_xml_buffer = new StringBuffer(xl_worksheets_sheet1_xml);

  // get position of the <dimension ref=\"A1\"/> in the static xl_worksheets_sheet1_xml
  int dimensionstart = xl_worksheets_sheet1_xml_buffer.indexOf("<dimension ref=\"A1\"/>");
  // replace the <dimension ref=\"A1\"/> with the new dimension
  xl_worksheets_sheet1_xml_buffer = xl_worksheets_sheet1_xml_buffer.replace(
   dimensionstart, 
   dimensionstart + "<dimension ref=\"A1\"/>".length(), 
   "<dimension ref=\"A1:" + Character.toString(c) + r + "\"/>");

  // get position of the <sheetData/> in the static xl_worksheets_sheet1_xml
  int sheetdatastart = xl_worksheets_sheet1_xml_buffer.indexOf("<sheetData/>");
  // replace the <sheetData/> with the prepared sheet date string
  xl_worksheets_sheet1_xml_buffer = xl_worksheets_sheet1_xml_buffer.replace(
   sheetdatastart, 
   sheetdatastart + "<sheetData/>".length(), 
   sheetdata);

  // create the xl/worksheets/sheet1.xml
  zipentry = new ZipEntry("xl/worksheets/sheet1.xml");
  zipout.putNextEntry(zipentry);
  data = xl_worksheets_sheet1_xml_buffer.toString().getBytes();
  zipout.write(data, 0, data.length);
  zipout.closeEntry();

  zipout.finish();

  // now ByteArrayOutputStream resultout contains the XLSX file data

  // writing this data into a file
  try (java.io.FileOutputStream fileout = new java.io.FileOutputStream("test.xlsx")) {
   resultout.writeTo(fileout);
   resultout.close();
  }

 }
}

解決方案3
 2  2018-06-16 01:22:03

現在是 2018 年。使用 Microsoft Graph API 並在 O365 中創建 Excel 文件。

Microsoft 已經發布了一些 Angular 和 C# 的示例。 它不是 Java，但它是一個很好的起點： https ://developer.microsoft.com/en-us/graph/docs/concepts/excel-write-to-workbook。

MS Graph Java SDK與 Android 兼容。

限制 - 沒有簡單的方法可以使用 API 從頭開始​​創建 Excel 文件。 您可能希望保留一個空白工作簿並每次都克隆它。

解決方案4
 2  2019-11-26 08:15:50

更新 Axel Richter 的回答：

  • 動態添加單元格
  • 無限列（不僅 26）
import java.io.ByteArrayOutputStream;
import java.io.FileOutputStream;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;

public class CreatePlainXLSX {

    //some static parts of the XLSX file:

    static String content_types_xml = "<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\"?><Types xmlns=\"http://schemas.openxmlformats.org/package/2006/content-types\"><Default ContentType=\"application/vnd.openxmlformats-package.relationships+xml\" Extension=\"rels\"/><Default ContentType=\"application/xml\" Extension=\"xml\"/><Override ContentType=\"application/vnd.openxmlformats-officedocument.extended-properties+xml\" PartName=\"/docProps/app.xml\"/><Override ContentType=\"application/vnd.openxmlformats-package.core-properties+xml\" PartName=\"/docProps/core.xml\"/><Override ContentType=\"application/vnd.openxmlformats-officedocument.spreadsheetml.sharedStrings+xml\" PartName=\"/xl/sharedStrings.xml\"/><Override ContentType=\"application/vnd.openxmlformats-officedocument.spreadsheetml.styles+xml\" PartName=\"/xl/styles.xml\"/><Override ContentType=\"application/vnd.openxmlformats-officedocument.spreadsheetml.sheet.main+xml\" PartName=\"/xl/workbook.xml\"/><Override ContentType=\"application/vnd.openxmlformats-officedocument.spreadsheetml.worksheet+xml\" PartName=\"/xl/worksheets/sheet1.xml\"/></Types>";

    static String docProps_app_xml = "<?xml version=\"1.0\" encoding=\"UTF-8\"?><Properties xmlns=\"http://schemas.openxmlformats.org/officeDocument/2006/extended-properties\"><Application>" + "Created Low level From Scratch" + "</Application></Properties>";

    static SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss'Z'");

    static String docProps_core_xml = "<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\"?><cp:coreProperties xmlns:cp=\"http://schemas.openxmlformats.org/package/2006/metadata/core-properties\" xmlns:dc=\"http://purl.org/dc/elements/1.1/\" xmlns:dcterms=\"http://purl.org/dc/terms/\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"><dcterms:created xsi:type=\"dcterms:W3CDTF\">" + formatter.format(Calendar.getInstance().getTime()) /*java.time.Instant.now().truncatedTo(java.time.temporal.ChronoUnit.SECONDS).toString()*/ + "</dcterms:created><dc:creator>" + "Axel Richter from scratch" + "</dc:creator></cp:coreProperties>";

    static String _rels_rels_xml  = "<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\"?><Relationships xmlns=\"http://schemas.openxmlformats.org/package/2006/relationships\"><Relationship Id=\"rId1\" Target=\"xl/workbook.xml\" Type=\"http://schemas.openxmlformats.org/officeDocument/2006/relationships/officeDocument\"/><Relationship Id=\"rId2\" Target=\"docProps/app.xml\" Type=\"http://schemas.openxmlformats.org/officeDocument/2006/relationships/extended-properties\"/><Relationship Id=\"rId3\" Target=\"docProps/core.xml\" Type=\"http://schemas.openxmlformats.org/package/2006/relationships/metadata/core-properties\"/></Relationships>";

    static String xl_rels_workbook_xml_rels_xml = "<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\"?><Relationships xmlns=\"http://schemas.openxmlformats.org/package/2006/relationships\"><Relationship Id=\"rId1\" Target=\"sharedStrings.xml\" Type=\"http://schemas.openxmlformats.org/officeDocument/2006/relationships/sharedStrings\"/><Relationship Id=\"rId2\" Target=\"styles.xml\" Type=\"http://schemas.openxmlformats.org/officeDocument/2006/relationships/styles\"/><Relationship Id=\"rId3\" Target=\"worksheets/sheet1.xml\" Type=\"http://schemas.openxmlformats.org/officeDocument/2006/relationships/worksheet\"/></Relationships>";

    static String xl_sharedstrings_xml = "<?xml version=\"1.0\" encoding=\"UTF-8\"?><sst count=\"0\" uniqueCount=\"0\" xmlns=\"http://schemas.openxmlformats.org/spreadsheetml/2006/main\"/>";

    static String xl_styles_xml = "<?xml version=\"1.0\" encoding=\"UTF-8\"?><styleSheet xmlns=\"http://schemas.openxmlformats.org/spreadsheetml/2006/main\"><numFmts count=\"0\"/><fonts count=\"1\"><font><sz val=\"11.0\"/><color indexed=\"8\"/><name val=\"Calibri\"/><family val=\"2\"/><scheme val=\"minor\"/></font></fonts><fills count=\"2\"><fill><patternFill patternType=\"none\"/></fill><fill><patternFill patternType=\"darkGray\"/></fill></fills><borders count=\"1\"><border><left/><right/><top/><bottom/><diagonal/></border></borders><cellStyleXfs count=\"1\"><xf numFmtId=\"0\" fontId=\"0\" fillId=\"0\" borderId=\"0\"/></cellStyleXfs><cellXfs count=\"1\"><xf numFmtId=\"0\" fontId=\"0\" fillId=\"0\" borderId=\"0\" xfId=\"0\"/></cellXfs></styleSheet>";

    static String xl_workbook_xml = "<?xml version=\"1.0\" encoding=\"UTF-8\"?><workbook xmlns=\"http://schemas.openxmlformats.org/spreadsheetml/2006/main\" xmlns:r=\"http://schemas.openxmlformats.org/officeDocument/2006/relationships\"><workbookPr date1904=\"false\"/><bookViews><workbookView activeTab=\"0\"/></bookViews><sheets><sheet name=\"" + "Sheet1" + "\" r:id=\"rId3\" sheetId=\"1\"/></sheets></workbook>";

    static String xl_worksheets_sheet1_xml = "<?xml version=\"1.0\" encoding=\"UTF-8\"?><worksheet xmlns=\"http://schemas.openxmlformats.org/spreadsheetml/2006/main\"><dimension ref=\"A1\"/><sheetViews><sheetView workbookViewId=\"0\" tabSelected=\"true\"/></sheetViews><sheetFormatPr defaultRowHeight=\"15.0\"/><sheetData/><pageMargins bottom=\"0.75\" footer=\"0.3\" header=\"0.3\" left=\"0.7\" right=\"0.7\" top=\"0.75\"/></worksheet>";


    ArrayList<ArrayList<Object>> sheetDat = new ArrayList<>();

    public CreatePlainXLSX() {
        sheetDat.add(0, new ArrayList<>());
    }

    public void addCell(int rowNum, int cellNum, Object value) {

        if (sheetDat.size() <= rowNum){
            for (int a = sheetDat.size(); a <= rowNum; a++) {
                sheetDat.add(new ArrayList<>());
            }
        }

        if (sheetDat.get(rowNum).size() <= cellNum) {
            for (int a = sheetDat.get(rowNum).size(); a <= cellNum; a++) {
                sheetDat.get(rowNum).add("");
            }
        }
        sheetDat.get(rowNum).set(cellNum, value);
    }

    private static int toNumber(String name) {
        int number = 0;
        for (int i = 0; i < name.length(); i++) {
            number = number * 26 + (name.charAt(i) - ('A' - 1));
        }
        return number;
    }

    private static String toName(int number) {
        StringBuilder sb = new StringBuilder();
        while (number-- > 0) {
            sb.append((char)('A' + (number % 26)));
            number /= 26;
        }
        return sb.reverse().toString();
    }

    private String incrementColumnR(String a){
        return toName(toNumber(a) + 1);
    }

    public void exportToFile(FileOutputStream fileout) throws Exception {

        // result goes into a ByteArrayOutputStream
        ByteArrayOutputStream resultout = new ByteArrayOutputStream();

        // needed objects
        ZipEntry zipentry;
        byte[] data;

        // create ZipOutputStream
        ZipOutputStream zipout = new ZipOutputStream(resultout);

        // create the static parts of the XLSX ZIP file:

        zipentry = new ZipEntry("[Content_Types].xml");
        zipout.putNextEntry(zipentry);
        data = content_types_xml.getBytes();
        zipout.write(data, 0, data.length);
        zipout.closeEntry();

        zipentry = new ZipEntry("docProps/app.xml");
        zipout.putNextEntry(zipentry);
        data = docProps_app_xml.getBytes();
        zipout.write(data, 0, data.length);
        zipout.closeEntry();

        zipentry = new ZipEntry("docProps/core.xml");
        zipout.putNextEntry(zipentry);
        data = docProps_core_xml.getBytes();
        zipout.write(data, 0, data.length);
        zipout.closeEntry();

        zipentry = new ZipEntry("_rels/.rels");
        zipout.putNextEntry(zipentry);
        data = _rels_rels_xml.getBytes();
        zipout.write(data, 0, data.length);
        zipout.closeEntry();

        zipentry = new ZipEntry("xl/_rels/workbook.xml.rels");
        zipout.putNextEntry(zipentry);
        data = xl_rels_workbook_xml_rels_xml.getBytes();
        zipout.write(data, 0, data.length);
        zipout.closeEntry();

        zipentry = new ZipEntry("xl/sharedStrings.xml");
        zipout.putNextEntry(zipentry);
        data = xl_sharedstrings_xml.getBytes();
        zipout.write(data, 0, data.length);
        zipout.closeEntry();

        zipentry = new ZipEntry("xl/styles.xml");
        zipout.putNextEntry(zipentry);
        data = xl_styles_xml.getBytes();
        zipout.write(data, 0, data.length);
        zipout.closeEntry();

        zipentry = new ZipEntry("xl/workbook.xml");
        zipout.putNextEntry(zipentry);
        data = xl_workbook_xml.getBytes();
        zipout.write(data, 0, data.length);
        zipout.closeEntry();

        // preparing the sheet data:

        String sheetdata = "<sheetData>";
        int r = 0;
        String c = toName(0);
        ArrayList<ArrayList<Object>> sheet = sheetDat;
        for (ArrayList<Object> rowData : sheet) {
            sheetdata += "<row r=\"" + ++r + "\">";
            c = toName(0);
            for (Object cellData : rowData) {
                c = incrementColumnR(c);
                sheetdata += "<c r=\"" + c + r + "\"";
                if (cellData instanceof String && ((String) cellData).startsWith("=")) {
                    sheetdata += "><f>" + ((String) cellData).replace("=", "") + "</f></c>";
                } else if (cellData instanceof String) {
                    sheetdata += " t=\"inlineStr\"><is><t>" + cellData + "</t></is></c>";
                } else if (cellData instanceof Double || cellData instanceof Integer) {
                    sheetdata += "><v>" + cellData + "</v></c>";
                }
            }
            sheetdata += "</row>";
        }
        sheetdata += "</sheetData>";

        // get the static sheet xml into a buffer for further processing
        StringBuffer xl_worksheets_sheet1_xml_buffer = new StringBuffer(xl_worksheets_sheet1_xml);

        // get position of the <dimension ref=\"A1\"/> in the static xl_worksheets_sheet1_xml
        int dimensionstart = xl_worksheets_sheet1_xml_buffer.indexOf("<dimension ref=\"A1\"/>");
        // replace the <dimension ref=\"A1\"/> with the new dimension
        xl_worksheets_sheet1_xml_buffer = xl_worksheets_sheet1_xml_buffer.replace(
                dimensionstart,
                dimensionstart + "<dimension ref=\"A1\"/>".length(),
                "<dimension ref=\"A1:" + c + r + "\"/>");

        // get position of the <sheetData/> in the static xl_worksheets_sheet1_xml
        int sheetdatastart = xl_worksheets_sheet1_xml_buffer.indexOf("<sheetData/>");
        // replace the <sheetData/> with the prepared sheet date string
        xl_worksheets_sheet1_xml_buffer = xl_worksheets_sheet1_xml_buffer.replace(
                sheetdatastart,
                sheetdatastart + "<sheetData/>".length(),
                sheetdata);

        // create the xl/worksheets/sheet1.xml
        zipentry = new ZipEntry("xl/worksheets/sheet1.xml");
        zipout.putNextEntry(zipentry);
        data = xl_worksheets_sheet1_xml_buffer.toString().getBytes();
        zipout.write(data, 0, data.length);
        zipout.closeEntry();

        zipout.finish();

        // now ByteArrayOutputStream resultout contains the XLSX file data

        // writing this data into a file
        if(fileout != null) {
            resultout.writeTo(fileout);
            resultout.close();
        }
    }
}

解決方案5
 0  2018-06-11 07:17:45

使用 Apache POI 並通過簡單地將compile "com.android.support:multidex:1.0.1"添加到build.gradle中的依賴項來啟用多 dex。 您還需要將 multiDexEnabled 設置為 true。 那應該擺脫 65k 方法的限制。

解決方案6
 0  2018-06-16 08:31:16

如果您不需要從任何來源讀取 xlsx 文件，我建議您使用 CSV excel 完全能夠將該類型轉換為其任何標准輸出。

即使您需要公式、單元格格式，也可以使用您引用的庫或使用您自己的 xml 解析器，正如我之前的許多人所說，excel 格式只是一個帶有 xml 的 zip。 這些xml在這里描述：

https://msdn.microsoft.com/en-us/library/dd979921(v=office.12).aspx

你會發現 excel 是一種非常復雜的格式，簡單的向后兼容並不是他們的首要任務。 因此，使用 XPath 或 JAXB 制作您自己的受限解析器將是一項繁重的工作，但並非不可能。

但我不明白你為什么要限制方法的數量？ 如果它是關於制作一些嵌入式軟件，在我看來，你不應該使用.xlsx，這是一個復雜而沉重的文件，只是為了保存網格......

解決方案7
 0  2019-10-17 00:39:32

我正在擴展 Axel Richter 的回答我下面的代碼將為您添加動態添加列和值的功能。

導入android.os.Build；

導入androidx.annotation.RequiresApi；

導入 java.io.ByteArrayOutputStream；

import java.util.ArrayList;
import java.util.Comparator;
import java.util.zip.*;

@SuppressWarnings("WeakerAccess")
@RequiresApi(api = Build.VERSION_CODES.O)
public class ExcelSpreadSheet {

//some static parts of the XLSX file:

String content_types_xml = "<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\"?><Types xmlns=\"http://schemas.openxmlformats.org/package/2006/content-types\"><Default ContentType=\"application/vnd.openxmlformats-package.relationships+xml\" Extension=\"rels\"/><Default ContentType=\"application/xml\" Extension=\"xml\"/><Override ContentType=\"application/vnd.openxmlformats-officedocument.extended-properties+xml\" PartName=\"/docProps/app.xml\"/><Override ContentType=\"application/vnd.openxmlformats-package.core-properties+xml\" PartName=\"/docProps/core.xml\"/><Override ContentType=\"application/vnd.openxmlformats-officedocument.spreadsheetml.sharedStrings+xml\" PartName=\"/xl/sharedStrings.xml\"/><Override ContentType=\"application/vnd.openxmlformats-officedocument.spreadsheetml.styles+xml\" PartName=\"/xl/styles.xml\"/><Override ContentType=\"application/vnd.openxmlformats-officedocument.spreadsheetml.sheet.main+xml\" PartName=\"/xl/workbook.xml\"/><Override ContentType=\"application/vnd.openxmlformats-officedocument.spreadsheetml.worksheet+xml\" PartName=\"/xl/worksheets/sheet1.xml\"/></Types>";

String docProps_app_xml = "<?xml version=\"1.0\" encoding=\"UTF-8\"?><Properties xmlns=\"http://schemas.openxmlformats.org/officeDocument/2006/extended-properties\"><Application>" + "Created Low level From Scratch" + "</Application></Properties>";

String docProps_core_xml = "<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\"?><cp:coreProperties xmlns:cp=\"http://schemas.openxmlformats.org/package/2006/metadata/core-properties\" xmlns:dc=\"http://purl.org/dc/elements/1.1/\" xmlns:dcterms=\"http://purl.org/dc/terms/\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"><dcterms:created xsi:type=\"dcterms:W3CDTF\">" + java.time.Instant.now().truncatedTo(java.time.temporal.ChronoUnit.SECONDS).toString() + "</dcterms:created><dc:creator>" + "Axel Richter from scratch" + "</dc:creator></cp:coreProperties>";

String _rels_rels_xml = "<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\"?><Relationships xmlns=\"http://schemas.openxmlformats.org/package/2006/relationships\"><Relationship Id=\"rId1\" Target=\"xl/workbook.xml\" Type=\"http://schemas.openxmlformats.org/officeDocument/2006/relationships/officeDocument\"/><Relationship Id=\"rId2\" Target=\"docProps/app.xml\" Type=\"http://schemas.openxmlformats.org/officeDocument/2006/relationships/extended-properties\"/><Relationship Id=\"rId3\" Target=\"docProps/core.xml\" Type=\"http://schemas.openxmlformats.org/package/2006/relationships/metadata/core-properties\"/></Relationships>";

String xl_rels_workbook_xml_rels_xml = "<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\"?><Relationships xmlns=\"http://schemas.openxmlformats.org/package/2006/relationships\"><Relationship Id=\"rId1\" Target=\"sharedStrings.xml\" Type=\"http://schemas.openxmlformats.org/officeDocument/2006/relationships/sharedStrings\"/><Relationship Id=\"rId2\" Target=\"styles.xml\" Type=\"http://schemas.openxmlformats.org/officeDocument/2006/relationships/styles\"/><Relationship Id=\"rId3\" Target=\"worksheets/sheet1.xml\" Type=\"http://schemas.openxmlformats.org/officeDocument/2006/relationships/worksheet\"/></Relationships>";

String xl_sharedstrings_xml = "<?xml version=\"1.0\" encoding=\"UTF-8\"?><sst count=\"0\" uniqueCount=\"0\" xmlns=\"http://schemas.openxmlformats.org/spreadsheetml/2006/main\"/>";

String xl_styles_xml = "<?xml version=\"1.0\" encoding=\"UTF-8\"?><styleSheet xmlns=\"http://schemas.openxmlformats.org/spreadsheetml/2006/main\"><numFmts count=\"0\"/><fonts count=\"1\"><font><sz val=\"11.0\"/><color indexed=\"8\"/><name val=\"Calibri\"/><family val=\"2\"/><scheme val=\"minor\"/></font></fonts><fills count=\"2\"><fill><patternFill patternType=\"none\"/></fill><fill><patternFill patternType=\"darkGray\"/></fill></fills><borders count=\"1\"><border><left/><right/><top/><bottom/><diagonal/></border></borders><cellStyleXfs count=\"1\"><xf numFmtId=\"0\" fontId=\"0\" fillId=\"0\" borderId=\"0\"/></cellStyleXfs><cellXfs count=\"1\"><xf numFmtId=\"0\" fontId=\"0\" fillId=\"0\" borderId=\"0\" xfId=\"0\"/></cellXfs></styleSheet>";

String xl_workbook_xml = "<?xml version=\"1.0\" encoding=\"UTF-8\"?><workbook xmlns=\"http://schemas.openxmlformats.org/spreadsheetml/2006/main\" xmlns:r=\"http://schemas.openxmlformats.org/officeDocument/2006/relationships\"><workbookPr date1904=\"false\"/><bookViews><workbookView activeTab=\"0\"/></bookViews><sheets><sheet name=\"" + "Sheet1" + "\" r:id=\"rId3\" sheetId=\"1\"/></sheets></workbook>";

String xl_worksheets_sheet1_xml = "<?xml version=\"1.0\" encoding=\"UTF-8\"?><worksheet xmlns=\"http://schemas.openxmlformats.org/spreadsheetml/2006/main\"><dimension ref=\"A1\"/><sheetViews><sheetView workbookViewId=\"0\" tabSelected=\"true\"/></sheetViews><sheetFormatPr defaultRowHeight=\"15.0\"/><sheetData/><pageMargins bottom=\"0.75\" footer=\"0.3\" header=\"0.3\" left=\"0.7\" right=\"0.7\" top=\"0.75\"/></worksheet>";

ArrayList<ArrayList<Object>> sheetDat = new ArrayList<>();
ArrayList<Object> sheetKeys = new ArrayList<>();

ExcelSpreadSheet() {
    sheetDat.add(0, new ArrayList<>());
}

int addFirstColumnKey(String key) {
    if (!sheetKeys.contains(key)) {
        if (sheetKeys.size() > 26) return -1;
        sheetKeys.add(key);
    }
    return sheetKeys.indexOf(key);
}

void addValueToRow(int rowID, String keyName, Object value) {
    addFirstColumnKey("ID");
    int columnEdit = addFirstColumnKey(keyName);
    if (columnEdit == -1) return;//ERROR
    int editingRow = -1;
    for (int i = 0; i < sheetDat.size(); i++) {
        if (sheetDat.get(i).get(0).equals(rowID)) {
            editingRow = i;
        }
    }
    if (editingRow == -1) {
        sheetDat.add(new ArrayList<>());
        editingRow = sheetDat.size() - 1;
    }
    if (sheetDat.get(editingRow).size() < sheetKeys.size()) {
        for (int a = 0; a < sheetKeys.size(); a++) {
            sheetDat.get(editingRow).add(0);
        }
    }
    sheetDat.get(editingRow).set(columnEdit, value);
    sheetDat.get(editingRow).set(0, rowID);
}

private class Sort implements Comparator<ArrayList<Object>> {
    int sortColumn;

    Sort(int columnToSortBy) {
        sortColumn = columnToSortBy;
    }

    public int compare(ArrayList<Object> a, ArrayList<Object> b) {
        if (a.size() < sortColumn || a.get(sortColumn) == null) {
            return 0;
        } else if (a.get(sortColumn) instanceof String) {
            return ((String) a.get(sortColumn)).compareTo(((String) b.get(sortColumn)));
        } else if (a.get(sortColumn) instanceof Integer) {
            return ((Integer) a.get(sortColumn)).compareTo(((Integer) b.get(sortColumn)));
        } else if (a.get(sortColumn) instanceof Long) {
            return ((Long) a.get(sortColumn)).compareTo(((Long) b.get(sortColumn)));
        } else if (a.get(sortColumn) instanceof Double) {
            return ((Double) a.get(sortColumn)).compareTo(((Double) b.get(sortColumn)));
        }
        return 0;
    }
}

void exportToFile() throws Exception {

    // result goes into a ByteArrayOutputStream
    ByteArrayOutputStream resultout = new ByteArrayOutputStream();

    // needed objects
    ZipEntry zipentry;
    byte[] data;

    // create ZipOutputStream
    ZipOutputStream zipout = new ZipOutputStream(resultout);

    // create the static parts of the XLSX ZIP file:

    zipentry = new ZipEntry("[Content_Types].xml");
    zipout.putNextEntry(zipentry);
    data = content_types_xml.getBytes();
    zipout.write(data, 0, data.length);
    zipout.closeEntry();

    zipentry = new ZipEntry("docProps/app.xml");
    zipout.putNextEntry(zipentry);
    data = docProps_app_xml.getBytes();
    zipout.write(data, 0, data.length);
    zipout.closeEntry();

    zipentry = new ZipEntry("docProps/core.xml");
    zipout.putNextEntry(zipentry);
    data = docProps_core_xml.getBytes();
    zipout.write(data, 0, data.length);
    zipout.closeEntry();

    zipentry = new ZipEntry("_rels/.rels");
    zipout.putNextEntry(zipentry);
    data = _rels_rels_xml.getBytes();
    zipout.write(data, 0, data.length);
    zipout.closeEntry();

    zipentry = new ZipEntry("xl/_rels/workbook.xml.rels");
    zipout.putNextEntry(zipentry);
    data = xl_rels_workbook_xml_rels_xml.getBytes();
    zipout.write(data, 0, data.length);
    zipout.closeEntry();

    zipentry = new ZipEntry("xl/sharedStrings.xml");
    zipout.putNextEntry(zipentry);
    data = xl_sharedstrings_xml.getBytes();
    zipout.write(data, 0, data.length);
    zipout.closeEntry();

    zipentry = new ZipEntry("xl/styles.xml");
    zipout.putNextEntry(zipentry);
    data = xl_styles_xml.getBytes();
    zipout.write(data, 0, data.length);
    zipout.closeEntry();

    zipentry = new ZipEntry("xl/workbook.xml");
    zipout.putNextEntry(zipentry);
    data = xl_workbook_xml.getBytes();
    zipout.write(data, 0, data.length);
    zipout.closeEntry();

    // preparing the sheet data:

    String sheetdata = "<sheetData>";
    int r = 0;
    char c = 'A';
    --c;
    ArrayList<ArrayList<Object>> sheet = sheetDat;
    sheet.add(0, sheetKeys);
    for (ArrayList<Object> rowData : sheet) {
        sheetdata += "<row r=\"" + ++r + "\">";
        c = 'A';
        --c;
        for (Object cellData : rowData) {
            sheetdata += "<c r=\"" + Character.toString(++c) + r + "\"";
            if (cellData instanceof String && ((String) cellData).startsWith("=")) {
                sheetdata += "><f>" + ((String) cellData).replace("=", "") + "</f></c>";
            } else if (cellData instanceof String) {
                sheetdata += " t=\"inlineStr\"><is><t>" + cellData + "</t></is></c>";
            } else if (cellData instanceof Double) {
                sheetdata += "><v>" + cellData + "</v></c>";
            }
        }
        sheetdata += "</row>";
    }
    sheetdata += "</sheetData>";

    // get the static sheet xml into a buffer for further processing
    StringBuffer xl_worksheets_sheet1_xml_buffer = new StringBuffer(xl_worksheets_sheet1_xml);

    // get position of the <dimension ref=\"A1\"/> in the static xl_worksheets_sheet1_xml
    int dimensionstart = xl_worksheets_sheet1_xml_buffer.indexOf("<dimension ref=\"A1\"/>");
    // replace the <dimension ref=\"A1\"/> with the new dimension
    xl_worksheets_sheet1_xml_buffer = xl_worksheets_sheet1_xml_buffer.replace(
            dimensionstart,
            dimensionstart + "<dimension ref=\"A1\"/>".length(),
            "<dimension ref=\"A1:" + c + r + "\"/>");

    // get position of the <sheetData/> in the static xl_worksheets_sheet1_xml
    int sheetdatastart = xl_worksheets_sheet1_xml_buffer.indexOf("<sheetData/>");
    // replace the <sheetData/> with the prepared sheet date string
    xl_worksheets_sheet1_xml_buffer = xl_worksheets_sheet1_xml_buffer.replace(
            sheetdatastart,
            sheetdatastart + "<sheetData/>".length(),
            sheetdata);

    // create the xl/worksheets/sheet1.xml
    zipentry = new ZipEntry("xl/worksheets/sheet1.xml");
    zipout.putNextEntry(zipentry);
    data = xl_worksheets_sheet1_xml_buffer.toString().getBytes();
    zipout.write(data, 0, data.length);
    zipout.closeEntry();

    zipout.finish();

    // now ByteArrayOutputStream resultout contains the XLSX file data

    // writing this data into a file
    try (java.io.FileOutputStream fileout = new java.io.FileOutputStream("working.xlsx")) {
        resultout.writeTo(fileout);
        resultout.close();
    }

}
}

解決方案8
 0  2022-06-13 18:04:19

或者，如果您需要手動添加值，直到行 AZ，請更改 Axel Richter 答案的這一部分：

從

String sheetdata = "<sheetData>";
        int r = 0;
        String c = toName(0);
        ArrayList<ArrayList<Object>> sheet = sheetDat;
        for (ArrayList<Object> rowData : sheet) {
            sheetdata += "<row r=\"" + ++r + "\">";
            c = toName(0);
            for (Object cellData : rowData) {
                c = incrementColumnR(c);
                sheetdata += "<c r=\"" + c + r + "\"";
                if (cellData instanceof String && ((String) cellData).startsWith("=")) {
                    sheetdata += "><f>" + ((String) cellData).replace("=", "") + "</f></c>";
                } else if (cellData instanceof String) {
                    sheetdata += " t=\"inlineStr\"><is><t>" + cellData + "</t></is></c>";
                } else if (cellData instanceof Double || cellData instanceof Integer) {
                    sheetdata += "><v>" + cellData + "</v></c>";
                }
            }
            sheetdata += "</row>";
        }
        sheetdata += "</sheetData>";

至

String sheetdata = "<sheetData>";
    int column = 0;
    int r = 0;
    char c = 'A';
    --c;
    for (Object[] rowData : sheetData) {
        sheetdata += "<row r=\"" + ++r + "\">";
        column = 0;
        c = 'A';
        --c;
        for (Object cellData : rowData) {
            if (column > 25 || ((Character.isLetter(c) && Character.isUpperCase(c)) || c == '@')) {
                if (column > 25) {
                    if (column == 26) {
                        c = 'A';
                        --c;
                    }
                    sheetdata += "<c r=\"" + "A" + Character.toString(++c) + r + "\"";
                } else if ((Character.isLetter(c) && Character.isUpperCase(c)) || c == '@') {
                    sheetdata += "<c r=\"" + Character.toString(++c) + r + "\"";
                }   
                column++;
                if (cellData instanceof String && ((String) cellData).startsWith("=")) {
                    sheetdata += "><f>" + ((String) cellData).replace("=", "") + "</f></c>";
                } else if (cellData instanceof String) {
                    sheetdata += " t=\"inlineStr\"><is><t>" + ((String) cellData) + "</t></is></c>";
                } else if (cellData instanceof Double) {
                    sheetdata += "><v>" + ((Double) cellData) + "</v></c>";
                }
            }
        }
        sheetdata += "</row>";
    }

解決方案9
 -1  2018-06-13 15:46:16

xlsx 是一個壓縮文件。 因此，我們可以提取 zip 並獲取其中的 xml 文件，然后我們可以自己解析它以獲取工作表數據。

這應該適用於 xls 和 xlsx。

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