我试过使用Jexcel
如 Vogella教程中所述，更新现有的 excel 表。
这里的问题是现有 excel 表中已经存在的数据被新写入的 excel 数据清除。
例如，如果我在 excel 中有这个
<table>
<tr>
<td>1</td> <td>2 </td>
</tr>
<tr>
<td>3</td> <td>4 </td>
</tr>
<table>
我想将数据添加到 2 和 4 旁边的新单元格中，例如
<table>
<tr>
<td>1</td> <td>2 </td> <td>X </td>
</tr>
<tr>
<td>3</td> <td>4 </td> <td>Y </td>
</tr>
<table>
写程序执行后，这就是我得到的
<table>
<tr>
<td> </td> <td> </td> <td>X </td>
</tr>
<tr>
<td> </td> <td> </td> <td>Y </td>
</tr>
<table>
Label label;
label = new Label(column, row, s, times);
sheet.addCell(label);
这是在指定的列和行添加单元格，但会清除其余的 excel 数据。
如何将数据添加到保留数据的现有 Excel 中？
以下是程序（参考：Vogella）。Excel 表已经有 20 行和前 2 列的数据，我正在尝试在第 3 列添加 20 行包 excel 的数据；
import java.io.File;
import java.io.IOException;
import java.util.Locale;
import jxl.CellView;
import jxl.Workbook;
import jxl.WorkbookSettings;
import jxl.format.UnderlineStyle;
import jxl.write.Label;
import jxl.write.WritableCellFormat;
import jxl.write.WritableFont;
import jxl.write.WritableSheet;
import jxl.write.WritableWorkbook;
import jxl.write.WriteException;
import jxl.write.biff.RowsExceededException;
public class WriteExcel {
private WritableCellFormat timesBoldUnderline;
private WritableCellFormat times;
private String inputFile;
public void setOutputFile(String inputFile) {
this.inputFile = inputFile;
}
public void write() throws IOException, WriteException {
File file = new File(inputFile);
WorkbookSettings wbSettings = new WorkbookSettings();
wbSettings.setLocale(new Locale("en", "EN"));
WritableWorkbook workbook = Workbook.createWorkbook(file, wbSettings);
workbook.createSheet("Report", 0);
WritableSheet excelSheet = workbook.getSheet(0);
createLabel(excelSheet);
createContent(excelSheet);
workbook.write();
workbook.close();
}
private void createLabel(WritableSheet sheet) throws WriteException {
// Lets create a times font
WritableFont times10pt = new WritableFont(WritableFont.TIMES, 10);
// Define the cell format
times = new WritableCellFormat(times10pt);
// Lets automatically wrap the cells
times.setWrap(true);
// Create create a bold font with unterlines
WritableFont times10ptBoldUnderline = new WritableFont(
WritableFont.TIMES, 10, WritableFont.BOLD, false,
UnderlineStyle.SINGLE);
timesBoldUnderline = new WritableCellFormat(times10ptBoldUnderline);
// Lets automatically wrap the cells
timesBoldUnderline.setWrap(true);
CellView cv = new CellView();
cv.setFormat(times);
cv.setFormat(timesBoldUnderline);
cv.setAutosize(true);
}
private void createContent(WritableSheet sheet) throws WriteException,
RowsExceededException {
Integer salary = 1000;
// Now a bit of text
for (int i = 0; i < 20; i++) {
// third column
addLabel(sheet, 2, i, salary.toString());
// WritableCell cell = sheet.getWritableCell(2, i);
// if (cell.getType() == CellType.LABEL) {
// Label l = (Label) cell;
// l.setString("modified cell");
// }
salary += 1000;
}
}
private void addLabel(WritableSheet sheet, int column, int row, String s)
throws WriteException, RowsExceededException {
Label label;
label = new Label(column, row, s, times);
sheet.addCell(label);
}
public static void main(String[] args) throws WriteException, IOException {
WriteExcel test = new WriteExcel();
test.setOutputFile("c:/temp/lars.xls");
test.write();
System.out
.println("Please check the result file under c:/temp/lars.xls ");
}
}