Android中文档预览功能的实现思路及问题

Andriod中的文档在线查看功能,类似于网易邮箱大师中的附件预览功能,要求在app内直接打开office文档、pdf文档等。

思路一:后台统一转换文档格式,安卓端只预览一种格式文档。

  • 在后台将office(Word、Excle、PPT)文档转换为pdf文档,在安卓端预览的时候,其实是从后台先把pdf文档下载到手机上,再去读取。

  • 后台:openoffice + jodconverter将office文档转换为pdf格式。

    集成难度不大,网上教程非常多,需要在服务器上安装openoffice,转换速度很慢(页数多特别明显,页数少的话速度在可以接受的范围之内,转换速度与文档大小关系不大,主要是文档页数)。

  • 安卓端使用AndroidPdfViewer第三方库显示pdf文档。

    就是使用第三方库,也很简单。

思路二:在安卓端完成文档转换

  • 使用Apache的Poi组件,但是由于ppt在转换过程中需要用到java的awt,所以无法实现ppt的转换,也就是说只能实现word、excle的转换。如果项目中只是有转换word或者excle的需求,可以采用Poi。
  • 具体是:使用Poi将doc、docx、xls、xlsx文档转换为html,再使用webview加载本地html。
  • 这里要注意的是,Poi的jar包的导入。如果去apache的poi官网查看各组件的功能,以及要导入的jar包,但是网上的代码一般都是org.apache.poi.xwpf.converter.xhtml
    这个库的。等你导入了这个库,又自己从官网上下载了poi、poi-ooxml等jar包引入后,很可能会导致编译出错,提示有重复文件。这是由于导入的jar包的版本不一致导致的。正确的导入方式可以参考下面的:
    这个会自动把关联的jar包引入,从maven仓库可以看到这个jar的依赖,以及依赖的依赖,
    总之很多,可以在project视图中External Libraries来查看这个库文件到底包含了哪些jar包。
    compile 'fr.opensagres.xdocreport:org.apache.poi.xwpf.converter.xhtml:1.0.6'
  ---------------------------------------------------------------------------------------------------
    这个主要是doc的转换用到的,可以不引入,网上也有很多转换方法没有用到这个库
    //compile 'fr.opensagres.xdocreport:fr.opensagres.xdocreport.document:1.0.6'
  --------------------------------------------------------------------------------------------------- 
    这个库文件的版本至关重要,因为...xhtml:1.0.6中依赖的poi等jar的版本就是3.10-FINAL,
    所以这里必须也是3.10-FINAL,不然编译肯定不会通过。
    compile 'org.apache.poi:poi-scratchpad:3.10-FINAL'

总之,如果你在apache.poi官网上看各个组件之间的依赖关系有些困难,可以去maven看。
  • 除了引入库文件以外,还需要在app的gradle文件中添加如下语句:
  defaultConfig {
      ...
      multiDexEnabled true
      ...
  }
  packagingOptions { 
        ...
        exclude 'META-INF/LICENSE'
        exclude 'META-INF/NOTICE'
  dexOptions {
        javaMaxHeapSize "3g"
        jumboMode = true
        preDexLibraries = false
    }
    lintOptions {
        abortOnError false
    }
    project.tasks.withType(com.android.build.gradle.tasks.Dex) {
        additionalParameters = ['--core-library']
    }

思路三:其他

  • 参考附件在线预览控件实现的市场调研

  • POI由于预览效果不是很好,不建议使用(安卓无法转换ppt与pptx)

  • Flashpaper缺少后续支持,不建议使用(后台,与安卓无关)

  • 第三方付费产品中,Office Web 365

    完全依赖于第三方云服务,在安全性、灵活性、稳定性为验证,不建议使用

  • 科瀚的SOAOffice和卓正软件的pageoffice需要浏览器Activex插件的支持,对用户不是很友好,不建议试用(后台,与安卓无关)

  • OpenOffice的预览效果稍差,但集成方便;

  • Office Web Apps预览效果最佳,钉钉、126等也采用此方式,但估计集成难度稍大,另外钉钉的预览偶尔也出现不稳定的情况;

  • 永中office的预览效果和集成难度比较平衡,但需付费。

  • 总之,除非需求必须,否则这种功能还是不要实现,因为难度很大,耗时费力,一般情况下交给系统去打开就行了。当然,主要功能是文档阅读的app除外。

一些代码参考

说明:大部分是从网上找的,仅供参考,功能没问题,但很多细节有待完善。

package com.ght.loginapp.utilities;

import org.apache.poi.hssf.converter.ExcelToHtmlConverter;
import org.apache.poi.hwpf.HWPFDocument;
import org.apache.poi.hwpf.converter.PicturesManager;
import org.apache.poi.hwpf.converter.WordToHtmlConverter;
import org.apache.poi.hwpf.usermodel.Picture;
import org.apache.poi.hwpf.usermodel.PictureType;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.ss.usermodel.WorkbookFactory;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.apache.poi.xwpf.converter.core.FileImageExtractor;
import org.apache.poi.xwpf.converter.core.FileURIResolver;
import org.apache.poi.xwpf.converter.xhtml.XHTMLConverter;
import org.apache.poi.xwpf.converter.xhtml.XHTMLOptions;
import org.apache.poi.xwpf.usermodel.XWPFDocument;
import org.w3c.dom.Document;

import java.io.BufferedWriter;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.text.DecimalFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.HashMap;
import java.util.List;

import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.OutputKeys;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerConfigurationException;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;


import org.apache.poi.hssf.usermodel.HSSFDateUtil;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import java.util.Map;


import org.apache.poi.hssf.usermodel.HSSFCellStyle;
import org.apache.poi.hssf.usermodel.HSSFDataFormat;
import org.apache.poi.hssf.usermodel.HSSFFont;
import org.apache.poi.hssf.usermodel.HSSFPalette;
import org.apache.poi.hssf.util.HSSFColor;
import org.apache.poi.ss.usermodel.CellStyle;
import org.apache.poi.ss.util.CellRangeAddress;
import org.apache.poi.xssf.usermodel.XSSFCellStyle;
import org.apache.poi.xssf.usermodel.XSSFColor;
import org.apache.poi.xssf.usermodel.XSSFFont;


/**
 * 2016/9/12 0012,由 yuezc 创建 .
 * 

* 功能描述: *

* 说明: * --------------------------- * 修改时间: * 修改说明: * 修改人: *

* POIFS * POIFS是该项目的最古老,最稳定的一部分。.这是格式化OLE 2复合文档为纯Java的接口。 它同时支持读写功能。所有的组件,最终都依赖于它的定义 *

* HSSF 和 XSSF * HSSF: MS-Excel 97-2003(.xls),基于BIFF8格式的JAVA接口。 * XSSF:MS-Excel 2007+(.xlsx),基于OOXML格式的JAVA接口。 *

* HWPF 和XWPF * HWPF: MS-Word 97-2003(.doc),基于BIFF8格式的JAVA接口。只支持.doc文件简单的操作,读写能力有限。本API为POI项目早期开发,很不幸的 是主要负责HWPF模块开发的工程师-“Ryan Ackley”已经离开Apache组织,现在该模块没有人维护、更新、完善。 * XWPF:MS-Word 2007+(.docx),基于OOXML格式的JAVA接口。较HWPF功能完善。 */ public class DocumentFormatConvertUtils { /** * doc文档转成html格式 */ public static void doc2html(String docPath, final String docName, String htmlName, String htmlPath) { HWPFDocument wordDocument = null; try { wordDocument = new HWPFDocument(new FileInputStream(docPath + docName)); } catch (IOException e) { e.printStackTrace(); } WordToHtmlConverter wordToHtmlConverter = null; try { wordToHtmlConverter = new WordToHtmlConverter( DocumentBuilderFactory.newInstance().newDocumentBuilder().newDocument()); } catch (ParserConfigurationException e) { e.printStackTrace(); } //设置图片路径 wordToHtmlConverter.setPicturesManager(new PicturesManager() { public String savePicture(byte[] content, PictureType pictureType, String suggestedName, float widthInches, float heightInches) { String name = docName.substring(0, docName.indexOf("\\.")); return name + "/" + suggestedName; } }); //保存图片 List pics = wordDocument.getPicturesTable().getAllPictures(); if (pics != null) { for (int i = 0; i < pics.size(); i++) { Picture pic = (Picture) pics.get(i); System.out.println(pic.suggestFullFileName()); try { String name = docName.substring(0, docName.indexOf("\\.")); pic.writeImageContent(new FileOutputStream(htmlPath + name + "/" + pic.suggestFullFileName())); } catch (Exception e) { e.printStackTrace(); } } } wordToHtmlConverter.processDocument(wordDocument); Document htmlDocument = wordToHtmlConverter.getDocument(); ByteArrayOutputStream out = new ByteArrayOutputStream(); DOMSource domSource = new DOMSource(htmlDocument); StreamResult streamResult = new StreamResult(out); TransformerFactory tf = TransformerFactory.newInstance(); Transformer serializer = null; try { serializer = tf.newTransformer(); } catch (TransformerConfigurationException e) { e.printStackTrace(); } serializer.setOutputProperty(OutputKeys.ENCODING, "utf-8"); serializer.setOutputProperty(OutputKeys.INDENT, "yes"); serializer.setOutputProperty(OutputKeys.METHOD, "html"); try { serializer.transform(domSource, streamResult); } catch (TransformerException e) { e.printStackTrace(); } try { out.close(); } catch (IOException e) { e.printStackTrace(); } //保存html文件 writeFile(new String(out.toByteArray()), htmlPath + htmlName); } /** * docx文档转成html格式 */ public static void docx2html(String docxPath, String docxName, String htmlName, String htmlPath) { try { final String file = docxPath + docxName; File f = new File(file); if (!f.exists()) { System.out.println("Sorry File does not Exists!"); } else { if (f.getName().endsWith(".docx") || f.getName().endsWith(".DOCX")) { // 1) 加载word文档生成 XWPFDocument对象 InputStream in = new FileInputStream(f); XWPFDocument document = new XWPFDocument(in); // 2) 解析 XHTML配置 (这里设置IURIResolver来设置图片存放的目录) File imageFolderFile = new File(docxPath); XHTMLOptions options = XHTMLOptions.create().URIResolver(new FileURIResolver(imageFolderFile)); options.setExtractor(new FileImageExtractor(imageFolderFile)); options.setIgnoreStylesIfUnused(false); options.setFragment(true); // 3) 将 XWPFDocument转换成XHTML OutputStream out = new FileOutputStream(new File(htmlPath + htmlName)); XHTMLConverter.getInstance().convert(document, out, options); } else { System.out.println("Enter only MS Office 2007+ files"); } } } catch (Exception e) { e.printStackTrace(); } } /** * xls文档转成html格式 */ public static void xls2html(String xlsPath, String xlsName, String htmlName, String htmlPath) { try { InputStream input = new FileInputStream(xlsPath + xlsName); HSSFWorkbook excelBook = new HSSFWorkbook(input); ExcelToHtmlConverter excelToHtmlConverter = new ExcelToHtmlConverter(DocumentBuilderFactory.newInstance().newDocumentBuilder().newDocument()); excelToHtmlConverter.processWorkbook(excelBook); List pics = excelBook.getAllPictures(); if (pics != null) { for (int i = 0; i < pics.size(); i++) { Picture pic = (Picture) pics.get(i); try { pic.writeImageContent(new FileOutputStream(xlsName.substring(0, xlsName.indexOf(".")) + pic.suggestFullFileName())); } catch (FileNotFoundException e) { e.printStackTrace(); } } } Document htmlDocument = excelToHtmlConverter.getDocument(); ByteArrayOutputStream outStream = new ByteArrayOutputStream(); DOMSource domSource = new DOMSource(htmlDocument); StreamResult streamResult = new StreamResult(outStream); TransformerFactory tf = TransformerFactory.newInstance(); Transformer serializer = tf.newTransformer(); serializer.setOutputProperty(OutputKeys.ENCODING, "utf-8"); serializer.setOutputProperty(OutputKeys.INDENT, "yes"); serializer.setOutputProperty(OutputKeys.METHOD, "html"); serializer.transform(domSource, streamResult); outStream.close(); //保存html文件 writeFile(new String(outStream.toByteArray()), htmlPath + htmlName); } catch (Exception e) { } } /** * xlsx文档转成html格式 */ public static void xlsx2html(String xlsxPath, String xlsxName, String htmlName, String htmlPath) { writeFile(readExcelToHtml(xlsxPath + xlsxName, true), htmlPath + htmlName); } public static void ppt2html(String pptPath, String pptName, String htmlName, String htmlPath) { //抱歉,没有实现 } public static void pptx2html(String pptxPath, String pptxName, String htmlName, String htmlPath) { //抱歉,没有实现 } --------------------------------------- /** * 将html文件保存到sd卡 */ public static void writeFile(String content, String path) { FileOutputStream fos = null; BufferedWriter bw = null; try { File file = new File(path); if (!file.exists()) { file.createNewFile(); } fos = new FileOutputStream(file); bw = new BufferedWriter(new OutputStreamWriter(fos, "utf-8")); bw.write(content); } catch (FileNotFoundException fnfe) { fnfe.printStackTrace(); } catch (IOException ioe) { ioe.printStackTrace(); } finally { try { if (bw != null) bw.close(); if (fos != null) fos.close(); } catch (IOException ie) { } } } /** * @param filePath 文件的路径 * @param isWithStyle 是否需要表格样式 包含 字体 颜色 边框 对齐方式 * @return

* ... *
* 字符串 */ public static String readExcelToHtml(String filePath, boolean isWithStyle) { InputStream is = null; String htmlExcel = null; try { File sourcefile = new File(filePath); is = new FileInputStream(sourcefile); Workbook wb = WorkbookFactory.create(is); if (wb instanceof XSSFWorkbook) { XSSFWorkbook xWb = (XSSFWorkbook) wb; htmlExcel = getExcelInfo(xWb, isWithStyle); } else if (wb instanceof HSSFWorkbook) { HSSFWorkbook hWb = (HSSFWorkbook) wb; htmlExcel = getExcelInfo(hWb, isWithStyle); } } catch (Exception e) { e.printStackTrace(); } finally { try { is.close(); } catch (IOException e) { e.printStackTrace(); } } return htmlExcel; } public static String getExcelInfo(Workbook wb, boolean isWithStyle) { StringBuffer sb = new StringBuffer(); Sheet sheet = wb.getSheetAt(0);// 获取第一个Sheet的内容 int lastRowNum = sheet.getLastRowNum(); Map map[] = getRowSpanColSpanMap(sheet); sb.append(""); Row row = null; // 兼容 Cell cell = null; // 兼容 for (int rowNum = sheet.getFirstRowNum(); rowNum <= lastRowNum; rowNum++) { row = sheet.getRow(rowNum); if (row == null) { sb.append(""); continue; } sb.append(""); int lastColNum = row.getLastCellNum(); for (int colNum = 0; colNum < lastColNum; colNum++) { cell = row.getCell(colNum); if (cell == null) { // 特殊情况 空白的单元格会返回null sb.append(""); continue; } String stringValue = getCellValue(cell); if (map[0].containsKey(rowNum + "," + colNum)) { String pointString = map[0].get(rowNum + "," + colNum); map[0].remove(rowNum + "," + colNum); int bottomeRow = Integer.valueOf(pointString.split(",")[0]); int bottomeCol = Integer.valueOf(pointString.split(",")[1]); int rowSpan = bottomeRow - rowNum + 1; int colSpan = bottomeCol - colNum + 1; sb.append(""); } sb.append(""); } sb.append("
"); if (stringValue == null || "".equals(stringValue.trim())) { sb.append(" "); } else { // 将ascii码为160的空格转换为html下的空格( ) sb.append(stringValue.replace(String.valueOf((char) 160), " ")); } sb.append("
"); return sb.toString(); } private static Map[] getRowSpanColSpanMap(Sheet sheet) { Map map0 = new HashMap(); Map map1 = new HashMap(); int mergedNum = sheet.getNumMergedRegions(); CellRangeAddress range = null; for (int i = 0; i < mergedNum; i++) { range = sheet.getMergedRegion(i); int topRow = range.getFirstRow(); int topCol = range.getFirstColumn(); int bottomRow = range.getLastRow(); int bottomCol = range.getLastColumn(); map0.put(topRow + "," + topCol, bottomRow + "," + bottomCol); // System.out.println(topRow + "," + topCol + "," + bottomRow + "," // + bottomCol); int tempRow = topRow; while (tempRow <= bottomRow) { int tempCol = topCol; while (tempCol <= bottomCol) { map1.put(tempRow + "," + tempCol, ""); tempCol++; } tempRow++; } map1.remove(topRow + "," + topCol); } Map[] map = {map0, map1}; return map; } /** * 获取表格单元格Cell内容 * * @param cell * @return */ private static String getCellValue(Cell cell) { String result = new String(); switch (cell.getCellType()) { case Cell.CELL_TYPE_NUMERIC:// 数字类型 if (HSSFDateUtil.isCellDateFormatted(cell)) {// 处理日期格式、时间格式 SimpleDateFormat sdf = null; if (cell.getCellStyle().getDataFormat() == HSSFDataFormat.getBuiltinFormat("h:mm")) { sdf = new SimpleDateFormat("HH:mm"); } else {// 日期 sdf = new SimpleDateFormat("yyyy-MM-dd"); } Date date = cell.getDateCellValue(); result = sdf.format(date); } else if (cell.getCellStyle().getDataFormat() == 58) { // 处理自定义日期格式:m月d日(通过判断单元格的格式id解决,id的值是58) SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd"); double value = cell.getNumericCellValue(); Date date = org.apache.poi.ss.usermodel.DateUtil.getJavaDate(value); result = sdf.format(date); } else { double value = cell.getNumericCellValue(); CellStyle style = cell.getCellStyle(); DecimalFormat format = new DecimalFormat(); String temp = style.getDataFormatString(); // 单元格设置成常规 if (temp.equals("General")) { format.applyPattern("#"); } result = format.format(value); } break; case Cell.CELL_TYPE_STRING:// String类型 result = cell.getRichStringCellValue().toString(); break; case Cell.CELL_TYPE_BLANK: result = ""; break; default: result = ""; break; } return result; } /** * 处理表格样式 * * @param wb * @param sheet * @param cell * @param sb */ private static void dealExcelStyle(Workbook wb, Sheet sheet, Cell cell, StringBuffer sb) { CellStyle cellStyle = cell.getCellStyle(); if (cellStyle != null) { short alignment = cellStyle.getAlignment(); sb.append("align='" + convertAlignToHtml(alignment) + "' ");// 单元格内容的水平对齐方式 short verticalAlignment = cellStyle.getVerticalAlignment(); sb.append("valign='" + convertVerticalAlignToHtml(verticalAlignment) + "' ");// 单元格中内容的垂直排列方式 if (wb instanceof XSSFWorkbook) { XSSFFont xf = ((XSSFCellStyle) cellStyle).getFont(); short boldWeight = xf.getBoldweight(); sb.append("style='"); sb.append("font-weight:" + boldWeight + ";"); // 字体加粗 sb.append("font-size: " + xf.getFontHeight() / 2 + "%;"); // 字体大小 int columnWidth = sheet.getColumnWidth(cell.getColumnIndex()); sb.append("width:" + columnWidth + "px;"); XSSFColor xc = xf.getXSSFColor(); if (xc != null && !"".equals(xc)) { sb.append("color:#" + xc.getARGBHex().substring(2) + ";"); // 字体颜色 } XSSFColor bgColor = (XSSFColor) cellStyle.getFillForegroundColorColor(); // System.out.println("************************************"); // System.out.println("BackgroundColorColor: // "+cellStyle.getFillBackgroundColorColor()); // System.out.println("ForegroundColor: // "+cellStyle.getFillForegroundColor());//0 // System.out.println("BackgroundColorColor: // "+cellStyle.getFillBackgroundColorColor()); // System.out.println("ForegroundColorColor: // "+cellStyle.getFillForegroundColorColor()); // String bgColorStr = bgColor.getARGBHex(); // System.out.println("bgColorStr: "+bgColorStr); if (bgColor != null && !"".equals(bgColor)) { sb.append("background-color:#" + bgColor.getARGBHex().substring(2) + ";"); // 背景颜色 } sb.append(getBorderStyle(0, cellStyle.getBorderTop(), ((XSSFCellStyle) cellStyle).getTopBorderXSSFColor())); sb.append(getBorderStyle(1, cellStyle.getBorderRight(), ((XSSFCellStyle) cellStyle).getRightBorderXSSFColor())); sb.append(getBorderStyle(2, cellStyle.getBorderBottom(), ((XSSFCellStyle) cellStyle).getBottomBorderXSSFColor())); sb.append(getBorderStyle(3, cellStyle.getBorderLeft(), ((XSSFCellStyle) cellStyle).getLeftBorderXSSFColor())); } else if (wb instanceof HSSFWorkbook) { HSSFFont hf = ((HSSFCellStyle) cellStyle).getFont(wb); short boldWeight = hf.getBoldweight(); short fontColor = hf.getColor(); sb.append("style='"); HSSFPalette palette = ((HSSFWorkbook) wb).getCustomPalette(); // 类HSSFPalette用于求的颜色的国际标准形式 HSSFColor hc = palette.getColor(fontColor); sb.append("font-weight:" + boldWeight + ";"); // 字体加粗 sb.append("font-size: " + hf.getFontHeight() / 2 + "%;"); // 字体大小 String fontColorStr = convertToStardColor(hc); if (fontColorStr != null && !"".equals(fontColorStr.trim())) { sb.append("color:" + fontColorStr + ";"); // 字体颜色 } int columnWidth = sheet.getColumnWidth(cell.getColumnIndex()); sb.append("width:" + columnWidth + "px;"); short bgColor = cellStyle.getFillForegroundColor(); hc = palette.getColor(bgColor); String bgColorStr = convertToStardColor(hc); if (bgColorStr != null && !"".equals(bgColorStr.trim())) { sb.append("background-color:" + bgColorStr + ";"); // 背景颜色 } sb.append(getBorderStyle(palette, 0, cellStyle.getBorderTop(), cellStyle.getTopBorderColor())); sb.append(getBorderStyle(palette, 1, cellStyle.getBorderRight(), cellStyle.getRightBorderColor())); sb.append(getBorderStyle(palette, 3, cellStyle.getBorderLeft(), cellStyle.getLeftBorderColor())); sb.append(getBorderStyle(palette, 2, cellStyle.getBorderBottom(), cellStyle.getBottomBorderColor())); } sb.append("' "); } } /** * 单元格内容的水平对齐方式 * * @param alignment * @return */ private static String convertAlignToHtml(short alignment) { String align = "left"; switch (alignment) { case CellStyle.ALIGN_LEFT: align = "left"; break; case CellStyle.ALIGN_CENTER: align = "center"; break; case CellStyle.ALIGN_RIGHT: align = "right"; break; default: break; } return align; } /** * 单元格中内容的垂直排列方式 * * @param verticalAlignment * @return */ private static String convertVerticalAlignToHtml(short verticalAlignment) { String valign = "middle"; switch (verticalAlignment) { case CellStyle.VERTICAL_BOTTOM: valign = "bottom"; break; case CellStyle.VERTICAL_CENTER: valign = "center"; break; case CellStyle.VERTICAL_TOP: valign = "top"; break; default: break; } return valign; } private static String convertToStardColor(HSSFColor hc) { StringBuffer sb = new StringBuffer(""); if (hc != null) { if (HSSFColor.AUTOMATIC.index == hc.getIndex()) { return null; } sb.append("#"); for (int i = 0; i < hc.getTriplet().length; i++) { sb.append(fillWithZero(Integer.toHexString(hc.getTriplet()[i]))); } } return sb.toString(); } private static String fillWithZero(String str) { if (str != null && str.length() < 2) { return "0" + str; } return str; } static String[] bordesr = {"border-top:", "border-right:", "border-bottom:", "border-left:"}; static String[] borderStyles = {"solid ", "solid ", "solid ", "solid ", "solid ", "solid ", "solid ", "solid ", "solid ", "solid", "solid", "solid", "solid", "solid"}; private static String getBorderStyle(HSSFPalette palette, int b, short s, short t) { if (s == 0) return bordesr[b] + borderStyles[s] + "#d0d7e5 1px;"; String borderColorStr = convertToStardColor(palette.getColor(t)); borderColorStr = borderColorStr == null || borderColorStr.length() < 1 ? "#000000" : borderColorStr; return bordesr[b] + borderStyles[s] + borderColorStr + " 1px;"; } private static String getBorderStyle(int b, short s, XSSFColor xc) { if (s == 0) return bordesr[b] + borderStyles[s] + "#d0d7e5 1px;"; if (xc != null && !"".equals(xc)) { String borderColorStr = xc.getARGBHex();// t.getARGBHex(); borderColorStr = borderColorStr == null || borderColorStr.length() < 1 ? "#000000" : borderColorStr.substring(2); return bordesr[b] + borderStyles[s] + borderColorStr + " 1px;"; } return ""; } }

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