ReadExcel.java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());
- }
- }
- }
天生我才必有用,千金散去还复来!