Android开发笔记（一百四十）Word文件的读取与显示
读取纯文本
现在手机的用途越来越广泛，从原来只有通讯功能的电话，到拍照手机，到上网手机，再到办公手机，可谓是无所不能了。说到办公，除了收发邮件，还有个频繁使用的功能，就是处理word文件。电脑上的office文件，常见的有三种格式，分别是word、excel和ppt，其中excel文件的读写已经在博文《Android开发笔记（三十四）Excel文件的读写》中做了介绍，比excel更加常用的是word文件，本文就对手机如何读取并显示word文件进行探讨。 如果仅仅把word文件里面的文字内容读取出来，有个简单的解决办法，只要在android工程中导入tm-extractors-0.4.jar，即可快速获得word文件中的文本。下面是使用tm-extractors读取word文件的截图：
下面是使用tm-extractors读取word文件的代码：
public class TextActivity extends Activity implements OnClickListener, FileSelectCallbacks {
private final static String TAG = "TextActivity";
private TextView tv_content;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_text);
findViewById(R.id.btn_open).setOnClickListener(this);
tv_content = (TextView) findViewById(R.id.tv_content);
}
@Override
public void onClick(View v) {
if (v.getId() == R.id.btn_open) {
FileSelectFragment.show(this, new String[] {"doc"}, null);
}
}
@Override
public void onConfirmSelect(String absolutePath, String fileName, Map<String, Object> map_param) {
String path = String.format("%s/%s", absolutePath, fileName);
Log.d(TAG, "path="+path);
//tm-extractors-0.4.jar与poi的包在编译时会冲突，二者只能同时导入一个
String content = readWord(path).trim();
Log.d(TAG, "content="+content);
tv_content.setText(content);
}
@Override
public boolean isFileValid(String absolutePath, String fileName, Map<String, Object> map_param) {
return true;
}
private String readWord(String file) {
String text = "";
try {
FileInputStream in = new FileInputStream(new File(file));
WordExtractor extractor = new WordExtractor();
text = extractor.extractText(in);
} catch (Exception e) {
e.printStackTrace();
}
return text;
}
}读取图文内容
虽然使用tm-extractors能够方便读取word文件，但是它的局限性也是显而易见的，因为它只能读取纯文本，无法读取图片，也无法读取文字格式，比如文字大小、文字颜色、文字字体、对齐方式等等都无能为力；而且tm-extractors只能读取doc格式，不支持office2007之后的docx格式，更是极大限制了它的适用范围。 所以要想把word里的图文内容原样读出，就得另想办法了，如果是在java服务端，可以考虑apache的poi库，该库支持读取包括word、excel、ppt在内的office文件；然而在android手机端，仅仅把word文件的图文内容读取出来还是不够的，还要想办法把这些图文内容在手机上显示才行。可是，复杂的图文内容，包括各种字体，要想使用android的原生控件来显示，并不是一件容易的事；只有借助于WebView，把图文内容转换为html文件，方可在手机屏幕上显示丰富样式的word文档。 总之，就是想办法把word文件转为html文件，然后使用WebView予以展示。这个原理并不难，难的是如何把word文件转为html文件。虽然结合poi库，可以把word文件里的文字样式与图片读出来，但是还得把这些内容使用html标签进行拼接，这里的转换规则并不容易，需要合理运用html标签才行。 下面是一个word文件的截图，其中包含文字和图片，文字又有不同大小、不同颜色、不同字体的文本。
下面是在手机上读取word文件并显示在屏幕上的界面截图，可以看到读取的效果与原来的word文件基本相似。
需要注意的是，Android4.2的WebView不会显示文本的斜体效果，4.4之后才会显示斜体文本。下面是使用poi读取word文件的页面代码：
public class HtmlActivity extends Activity implements OnClickListener, FileSelectCallbacks {
private final static String TAG = "HtmlActivity";
private WebView wv_content;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_html);
findViewById(R.id.btn_open).setOnClickListener(this);
wv_content = (WebView) findViewById(R.id.wv_content);
}
@Override
public void onClick(View v) {
if (v.getId() == R.id.btn_open) {
FileSelectFragment.show(this, new String[] {"doc", "docx"}, null);
}
}
@Override
public void onConfirmSelect(String absolutePath, String fileName, Map<String, Object> map_param) {
String path = String.format("%s/%s", absolutePath, fileName);
Log.d(TAG, "path="+path);
//tm-extractors-0.4.jar与poi的包在编译时会冲突，二者只能同时导入一个
WordUtil wu = new WordUtil(path);
Log.d(TAG, "htmlPath="+wu.htmlPath);
wv_content.loadUrl("file:///" + wu.htmlPath);
}
@Override
public boolean isFileValid(String absolutePath, String fileName, Map<String, Object> map_param) {
return true;
}
}下面是使用poi读取word文件的工具代码：
public class WordUtil {
private final static String TAG = "WordUtil";
public String htmlPath;
private String docPath;
private String picturePath;
private List<Picture> pictures;
private TableIterator tableIterator;
private int presentPicture = 0;
private FileOutputStream output;
private String htmlBegin = "<html><meta charset=\"utf-8\"><body>";
private String htmlEnd = "</body></html>";
private String tableBegin = "<table style=\"border-collapse:collapse\" border=1 bordercolor=\"black\">";
private String tableEnd = "</table>";
private String rowBegin = "<tr>", rowEnd = "</tr>";
private String columnBegin = "<td>", columnEnd = "</td>";
private String lineBegin = "<p>", lineEnd = "</p>";
private String centerBegin = "<center>", centerEnd = "</center>";
private String boldBegin = "<b>", boldEnd = "</b>";
private String underlineBegin = "<u>", underlineEnd = "</u>";
private String italicBegin = "<i>", italicEnd = "</i>";
private String fontSizeTag = "<font size=\"%d\">";
private String fontColorTag = "<font color=\"%s\">";
private String fontEnd = "</font>";
private String spanColor = "<span style=\"color:%s;\">", spanEnd = "</span>";
private String divRight = "<div align=\"right\">", divEnd = "</div>";
private String imgBegin = "<img src=\"%s\" >";
public WordUtil(String doc_name) {
docPath = doc_name;
htmlPath = FileUtil.createFile("html", FileUtil.getFileName(docPath) + ".html");
Log.d(TAG, "htmlPath=" + htmlPath);
try {
output = new FileOutputStream(new File(htmlPath));
presentPicture = 0;
output.write(htmlBegin.getBytes());
if (docPath.endsWith(".doc")) {
readDOC();
} else if (docPath.endsWith(".docx")) {
readDOCX();
}
output.write(htmlEnd.getBytes());
output.close();
} catch (Exception e) {
e.printStackTrace();
}
}
//读取word中的内容并写到sd卡上的html文件中
private void readDOC() {
try {
FileInputStream in = new FileInputStream(docPath);
POIFSFileSystem pfs = new POIFSFileSystem(in);
HWPFDocument hwpf = new HWPFDocument(pfs);
Range range = hwpf.getRange();
pictures = hwpf.getPicturesTable().getAllPictures();
tableIterator = new TableIterator(range);
int numParagraphs = range.numParagraphs();// 得到页面所有的段落数
for (int i = 0; i < numParagraphs; i++) { // 遍历段落数
Paragraph p = range.getParagraph(i); // 得到文档中的每一个段落
if (p.isInTable()) {
int temp = i;
if (tableIterator.hasNext()) {
Table table = tableIterator.next();
output.write(tableBegin.getBytes());
int rows = table.numRows();
for (int r = 0; r < rows; r++) {
output.write(rowBegin.getBytes());
TableRow row = table.getRow(r);
int cols = row.numCells();
int rowNumParagraphs = row.numParagraphs();
int colsNumParagraphs = 0;
for (int c = 0; c < cols; c++) {
output.write(columnBegin.getBytes());
TableCell cell = row.getCell(c);
int max = temp + cell.numParagraphs();
colsNumParagraphs = colsNumParagraphs + cell.numParagraphs();
for (int cp = temp; cp < max; cp++) {
Paragraph p1 = range.getParagraph(cp);
output.write(lineBegin.getBytes());
writeParagraphContent(p1);
output.write(lineEnd.getBytes());
temp++;
}
output.write(columnEnd.getBytes());
}
int max1 = temp + rowNumParagraphs;
for (int m = temp + colsNumParagraphs; m < max1; m++) {
temp++;
}
output.write(rowEnd.getBytes());
}
output.write(tableEnd.getBytes());
}
i = temp;
} else {
output.write(lineBegin.getBytes());
writeParagraphContent(p);
output.write(lineEnd.getBytes());
}
}
} catch (Exception e) {
e.printStackTrace();
}
}
private void readDOCX() {
try {
ZipFile docxFile = new ZipFile(new File(docPath));
ZipEntry sharedStringXML = docxFile.getEntry("word/document.xml");
InputStream inputStream = docxFile.getInputStream(sharedStringXML);
XmlPullParser xmlParser = Xml.newPullParser();
xmlParser.setInput(inputStream, "utf-8");
boolean isTable = false; // 表格
boolean isSize = false; // 文字大小
boolean isColor = false; // 文字颜色
boolean isCenter = false; // 居中对齐
boolean isRight = false; // 靠右对齐
boolean isItalic = false; // 斜体
boolean isUnderline = false; // 下划线
boolean isBold = false; // 加粗
boolean isRegion = false; // 在那个区域中
int pic_ndex = 1; // docx中的图片名从image1开始，所以索引从1开始
int event_type = xmlParser.getEventType();
while (event_type != XmlPullParser.END_DOCUMENT) {
switch (event_type) {
case XmlPullParser.START_TAG: // 开始标签
String tagBegin = xmlParser.getName();
if (tagBegin.equalsIgnoreCase("r")) {
isRegion = true;
}
if (tagBegin.equalsIgnoreCase("jc")) { // 判断对齐方式
String align = xmlParser.getAttributeValue(0);
if (align.equals("center")) {
output.write(centerBegin.getBytes());
isCenter = true;
}
if (align.equals("right")) {
output.write(divRight.getBytes());
isRight = true;
}
}
if (tagBegin.equalsIgnoreCase("color")) { // 判断文字颜色
String color = xmlParser.getAttributeValue(0);
output.write(String.format(spanColor, color).getBytes());
isColor = true;
}
if (tagBegin.equalsIgnoreCase("sz")) { // 判断文字大小
if (isRegion == true) {
int size = getSize(Integer.valueOf(xmlParser.getAttributeValue(0)));
output.write(String.format(fontSizeTag, size).getBytes());
isSize = true;
}
}
if (tagBegin.equalsIgnoreCase("tbl")) { // 检测到表格
output.write(tableBegin.getBytes());
isTable = true;
} else if (tagBegin.equalsIgnoreCase("tr")) { // 表格行
output.write(rowBegin.getBytes());
} else if (tagBegin.equalsIgnoreCase("tc")) { // 表格列
output.write(columnBegin.getBytes());
}
if (tagBegin.equalsIgnoreCase("pic")) { // 检测到图片
ZipEntry pic_entry = FileUtil.getPicEntry(docxFile, pic_ndex);
if (pic_entry != null) {
byte[] pictureBytes = FileUtil.getPictureBytes(docxFile, pic_entry);
writeDocumentPicture(pictureBytes);
}
pic_ndex++; // 转换一张后，索引+1
}
if (tagBegin.equalsIgnoreCase("p") && !isTable) {// 检测到段落，如果在表格中就无视
output.write(lineBegin.getBytes());
}
if (tagBegin.equalsIgnoreCase("b")) { // 检测到加粗
isBold = true;
}
if (tagBegin.equalsIgnoreCase("u")) { // 检测到下划线
isUnderline = true;
}
if (tagBegin.equalsIgnoreCase("i")) { // 检测到斜体
isItalic = true;
}
// 检测到文本
if (tagBegin.equalsIgnoreCase("t")) {
if (isBold == true) { // 加粗
output.write(boldBegin.getBytes());
}
if (isUnderline == true) { // 检测到下划线，输入<u>
output.write(underlineBegin.getBytes());
}
if (isItalic == true) { // 检测到斜体，输入<i>
output.write(italicBegin.getBytes());
}
String text = xmlParser.nextText();
output.write(text.getBytes()); // 写入文本
if (isItalic == true) { // 输入斜体结束标签</i>
output.write(italicEnd.getBytes());
isItalic = false;
}
if (isUnderline == true) { // 输入下划线结束标签</u>
output.write(underlineEnd.getBytes());
isUnderline = false;
}
if (isBold == true) { // 输入加粗结束标签</b>
output.write(boldEnd.getBytes());
isBold = false;
}
if (isSize == true) { // 输入字体结束标签</font>
output.write(fontEnd.getBytes());
isSize = false;
}
if (isColor == true) { // 输入跨度结束标签</span>
output.write(spanEnd.getBytes());
isColor = false;
}
// if (isCenter == true) { // 输入居中结束标签</center>。要在段落结束之前再输入该标签，因为该标签会强制换行
// output.write(centerEnd.getBytes());
// isCenter = false;
// }
if (isRight == true) { // 输入区块结束标签</div>
output.write(divEnd.getBytes());
isRight = false;
}
}
break;
// 结束标签
case XmlPullParser.END_TAG:
String tagEnd = xmlParser.getName();
if (tagEnd.equalsIgnoreCase("tbl")) { // 输入表格结束标签</table>
output.write(tableEnd.getBytes());
isTable = false;
}
if (tagEnd.equalsIgnoreCase("tr")) { // 输入表格行结束标签</tr>
output.write(rowEnd.getBytes());
}
if (tagEnd.equalsIgnoreCase("tc")) { // 输入表格列结束标签</td>
output.write(columnEnd.getBytes());
}
if (tagEnd.equalsIgnoreCase("p")) { // 输入段落结束标签</p>，如果在表格中就无视
if (isTable == false) {
if (isCenter == true) { // 输入居中结束标签</center>
output.write(centerEnd.getBytes());
isCenter = false;
}
output.write(lineEnd.getBytes());
}
}
if (tagEnd.equalsIgnoreCase("r")) {
isRegion = false;
}
break;
default:
break;
}
event_type = xmlParser.next();
}
} catch (Exception e) {
e.printStackTrace();
}
}
private int getSize(int sizeType) {
if (sizeType >= 1 && sizeType <= 8) {
return 1;
} else if (sizeType >= 9 && sizeType <= 11) {
return 2;
} else if (sizeType >= 12 && sizeType <= 14) {
return 3;
} else if (sizeType >= 15 && sizeType <= 19) {
return 4;
} else if (sizeType >= 20 && sizeType <= 29) {
return 5;
} else if (sizeType >= 30 && sizeType <= 39) {
return 6;
} else if (sizeType >= 40) {
return 7;
} else {
return 3;
}
}
private String getColor(int colorType) {
if (colorType == 1) {
return "#000000";
} else if (colorType == 2) {
return "#0000FF";
} else if (colorType == 3 || colorType == 4) {
return "#00FF00";
} else if (colorType == 5 || colorType == 6) {
return "#FF0000";
} else if (colorType == 7) {
return "#FFFF00";
} else if (colorType == 8) {
return "#FFFFFF";
} else if (colorType == 9 || colorType == 15) {
return "#CCCCCC";
} else if (colorType == 10 || colorType == 11) {
return "#00FF00";
} else if (colorType == 12 || colorType == 16) {
return "#080808";
} else if (colorType == 13 || colorType == 14) {
return "#FFFF00";
} else {
return "#000000";
}
}
public void writeDocumentPicture(byte[] pictureBytes) {
picturePath = FileUtil.createFile("html", FileUtil.getFileName(docPath) + presentPicture + ".jpg");
FileUtil.writePicture(picturePath, pictureBytes);
presentPicture++;
String imageString = String.format(imgBegin, picturePath);
try {
output.write(imageString.getBytes());
} catch (Exception e) {
e.printStackTrace();
}
}
public void writeParagraphContent(Paragraph paragraph) {
Paragraph p = paragraph;
int pnumCharacterRuns = p.numCharacterRuns();
for (int j = 0; j < pnumCharacterRuns; j++) {
CharacterRun run = p.getCharacterRun(j);
if (run.getPicOffset() == 0 || run.getPicOffset() >= 1000) {
if (presentPicture < pictures.size()) {
writeDocumentPicture(pictures.get(presentPicture).getContent());
}
} else {
try {
String text = run.text();
if (text.length() >= 2 && pnumCharacterRuns < 2) {
output.write(text.getBytes());
} else {
String fontSizeBegin = String.format(fontSizeTag, getSize(run.getFontSize()));
String fontColorBegin = String.format(fontColorTag, getColor(run.getColor()));
output.write(fontSizeBegin.getBytes());
output.write(fontColorBegin.getBytes());
if (run.isBold()) {
output.write(boldBegin.getBytes());
}
if (run.isItalic()) {
output.write(italicBegin.getBytes());
}
output.write(text.getBytes());
if (run.isBold()) {
output.write(boldEnd.getBytes());
}
if (run.isItalic()) {
output.write(italicEnd.getBytes());
}
output.write(fontEnd.getBytes());
output.write(fontEnd.getBytes());
}
} catch (Exception e) {
e.printStackTrace();
}
}
}
}
}本文参与 腾讯云自媒体分享计划，分享自作者个人站点/博客。
原始发表：2017年04月10日，如有侵权请联系 cloudcommunity@tencent.com 删除
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