word/excel在android读取，写入，更新数据

来源：互联网发布：天池大数据经验编辑：程序博客网时间：2024/05/20 06:08

> webview生成pdf的方法

public class WebViewDemoActivity extends Activity {
private WebView wv;
private static String url = "http://www.abc.pdf";

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);

wv = (WebView) this.findViewById(R.id.webView);
wv.getSettings().setJavaScriptEnabled(true);
wv.setWebChromeClient(new WebChromeClient());
wv.loadUrl("http://docs.google.com/gview?embedded=true&url="+url);
}
}

> android解析word，excel等文件的方法： http://blog.csdn.net/jingwen3699/article/details/9617739

1、使用poi。
2、使用Android-office-demo，Rendering MS-office documents with Library on Android platform. Supported formats: doc, docx, ppt, pptx, xls, xlsx View version is currently supported and editing function will be put out in future.
http://code.google.com/p/android-office-demo/downloads/list

》excel在android读取，写入，更新数据。依赖JXL.Jar文件：

public class ReadExcel extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
// createExcel();
// readExcel();
writeExcel("mnt/sdcard/test.xls");
}

public void readExcel() {
try {

/**
* 后续考虑问题,比如Excel里面的图片以及其他数据类型的读取
**/
InputStream is = new FileInputStream("mnt/sdcard/test.xls");

Workbook book = Workbook
.getWorkbook(new File("mnt/sdcard/test.xls"));
book.getNumberOfSheets();
// 获得第一个工作表对象
Sheet sheet = book.getSheet(0);
int Rows = sheet.getRows();
int Cols = sheet.getColumns();
System.out.println("当前工作表的名字:" + sheet.getName());
System.out.println("总行数:" + Rows);
System.out.println("总列数:" + Cols);
for (int i = 0; i < Cols; ++i) {
for (int j = 0; j < Rows; ++j) {
// getCell(Col,Row)获得单元格的值
System.out
.print((sheet.getCell(i, j)).getContents() + "\t");
}
System.out.print("\n");
}
// 得到第一列第一行的单元格
Cell cell1 = sheet.getCell(0, 0);
String result = cell1.getContents();
System.out.println(result);
book.close();
} catch (Exception e) {
System.out.println(e);
}
}

public void createExcel() {
try {
// 创建或打开Excel文件
WritableWorkbook book = Workbook.createWorkbook(new File(
"mnt/sdcard/test.xls"));

// 生成名为“第一页”的工作表,参数0表示这是第一页
WritableSheet sheet1 = book.createSheet("第一页", 0);
WritableSheet sheet2 = book.createSheet("第三页", 2);

// 在Label对象的构造函数中,元格位置是第一列第一行(0,0)以及单元格内容为test
Label label = new Label(0, 0, "test");

// 将定义好的单元格添加到工作表中
sheet1.addCell(label);

/*
* 生成一个保存数字的单元格.必须使用Number的完整包路径,否则有语法歧义
*/
jxl.write.Number number = new jxl.write.Number(1, 0, 555.12541);
sheet2.addCell(number);

// 写入数据并关闭文件
book.write();
book.close();
} catch (Exception e) {
System.out.println(e);
}
}

/**
* jxl暂时不提供修改已经存在的数据表,这里通过一个小办法来达到这个目的,不适合大型数据更新! 这里是通过覆盖原文件来更新的.
*
* @param filePath
*/
public void updateExcel(String filePath) {
try {
Workbook rwb = Workbook.getWorkbook(new File(filePath));
WritableWorkbook wwb = Workbook.createWorkbook(new File(
"d:/new.xls"), rwb);// copy
WritableSheet ws = wwb.getSheet(0);
WritableCell wc = ws.getWritableCell(0, 0);
// 判断单元格的类型,做出相应的转换
Label label = (Label) wc;
label.setString("The value has been modified");
wwb.write();
wwb.close();
rwb.close();
} catch (Exception e) {
e.printStackTrace();
}
}

public static void writeExcel(String filePath) {
try {
// 创建工作薄
WritableWorkbook wwb = Workbook.createWorkbook(new File(filePath));
// 创建工作表
WritableSheet ws = wwb.createSheet("Sheet1", 0);
// 添加标签文本
// Random rnd = new Random((new Date()).getTime());
// int forNumber = rnd.nextInt(100);
// Label label = new Label(0, 0, "test");
// for (int i = 0; i < 3; i++) {
// ws.addCell(label);
// ws.addCell(new jxl.write.Number(rnd.nextInt(50), rnd
// .nextInt(50), rnd.nextInt(1000)));
// }
// 添加图片(注意此处jxl暂时只支持png格式的图片)
// 0,1分别代表x,y 2,5代表宽和高占的单元格数
ws.addImage(new WritableImage(5, 5, 2, 5, new File(
"mnt/sdcard/nb.png")));
wwb.write();
wwb.close();
} catch (Exception e) {
System.out.println(e.toString());
}
}
}

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