有没有人知道使用POI将工作表从一个工作簿复制到另一个工作簿的方法？ Workbook类有一个cloneSheet方法，但似乎无法将克隆的工作表插入到新工作簿中？
如果没有API可以轻松完成此操作，是否有人有代码将所有数据（样式，列宽，数据等）从一个工作表复制到另一个工作表？
jxls具有复制工作表的方法，但在工作簿之间复制时它们不起作用。
答案 0 :(得分：5)
我已经用poi实现了一些功能。请参阅代码供您参考。
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
public class ExcelReadAndWrite {
public static void main(String[] args) throws IOException {
ExcelReadAndWrite excel = new ExcelReadAndWrite();
excel.process("D:/LNN/My Workspace/POI/src/tables.xls");
}
public void process(String fileName) throws IOException {
BufferedInputStream bis = new BufferedInputStream(new FileInputStream(fileName));
HSSFWorkbook workbook = new HSSFWorkbook(bis);
HSSFWorkbook myWorkBook = new HSSFWorkbook();
HSSFSheet sheet = null;
HSSFRow row = null;
HSSFCell cell = null;
HSSFSheet mySheet = null;
HSSFRow myRow = null;
HSSFCell myCell = null;
int sheets = workbook.getNumberOfSheets();
int fCell = 0;
int lCell = 0;
int fRow = 0;
int lRow = 0;
for (int iSheet = 0; iSheet < sheets; iSheet++) {
sheet = workbook.getSheetAt(iSheet);
if (sheet != null) {
mySheet = myWorkBook.createSheet(sheet.getSheetName());
fRow = sheet.getFirstRowNum();
lRow = sheet.getLastRowNum();
for (int iRow = fRow; iRow <= lRow; iRow++) {
row = sheet.getRow(iRow);
myRow = mySheet.createRow(iRow);
if (row != null) {
fCell = row.getFirstCellNum();
lCell = row.getLastCellNum();
for (int iCell = fCell; iCell < lCell; iCell++) {
cell = row.getCell(iCell);
myCell = myRow.createCell(iCell);
if (cell != null) {
myCell.setCellType(cell.getCellType());
switch (cell.getCellType()) {
case HSSFCell.CELL_TYPE_BLANK:
myCell.setCellValue("");
break;
case HSSFCell.CELL_TYPE_BOOLEAN:
myCell.setCellValue(cell.getBooleanCellValue());
break;
case HSSFCell.CELL_TYPE_ERROR:
myCell.setCellErrorValue(cell.getErrorCellValue());
break;
case HSSFCell.CELL_TYPE_FORMULA:
myCell.setCellFormula(cell.getCellFormula());
break;
case HSSFCell.CELL_TYPE_NUMERIC:
myCell.setCellValue(cell.getNumericCellValue());
break;
case HSSFCell.CELL_TYPE_STRING:
myCell.setCellValue(cell.getStringCellValue());
break;
default:
myCell.setCellFormula(cell.getCellFormula());
}
}
}
}
}
}
}
bis.close();
BufferedOutputStream bos = new BufferedOutputStream(
new FileOutputStream("workbook.xls", true));
myWorkBook.write(bos);
bos.close();
}
}
答案 1 :(得分：3)
我为NPOI创建了一个工作项目：http://npoi.codeplex.com/WorkItem/View.aspx?WorkItemId=6057。
更新：工作项目在NPOI 2.0中实施。您可以从https://npoi.codeplex.com/releases/view/112932
下载NPOI 2.0答案 2 :(得分：2)
如果您正在使用Java POI库，最好将电子表格加载到内存中，然后创建一个新的并写入您要复制的每个记录......不是最好的方法，但是要完成复制功能......
答案 3 :(得分：1)
我用POI（使用coderanch上的最新代码）做了大约一周的努力 - 请注意代码是有缺陷的（使用TreeSet时需要用HashMap替换它的问题），但是即使在确定它在公式上崩溃之后。
虽然有可能做到这一点是一个可怕的主张，不得不依赖于被黑客攻击的代码。
根据您的需求/预算，您可能需要考虑咬住子弹并支付aspose - http://www.aspose.com/doctest/java-components/aspose.cells-for-java/copy-move-worksheets-within-and-between-workbooks.html
它成功复制了包括格式，公式和＆amp ;;保护规则。我在130秒内完成了300张。 （300 x 90kb工作簿，编译成一个15mb工作簿）。该演示是免费的，它只是在工作簿中添加一张提醒您购买许可证的工作表。
答案 4 :(得分：0)
这是我将工作表从一个工作簿复制到另一个工作簿的实现。这个解决方案适合我。如果工作表没有表格等，此代码将起作用。如果工作表包含简单文本（String，boolean，int等），公式，此解决方案将起作用。
Workbook oldWB = new XSSFWorkbook(new FileInputStream("C:\\input.xlsx"));
Workbook newWB = new XSSFWorkbook();
CellStyle newStyle = newWB.createCellStyle(); // Need this to copy over styles from old sheet to new sheet. Next step will be processed below
Row row;
Cell cell;
for (int i = 0; i < oldWB.getNumberOfSheets(); i++) {
XSSFSheet sheetFromOldWB = (XSSFSheet) oldWB.getSheetAt(i);
XSSFSheet sheetForNewWB = (XSSFSheet) newWB.createSheet(sheetFromOldWB.getSheetName());
for (int rowIndex = 0; rowIndex < sheetFromOldWB.getPhysicalNumberOfRows(); rowIndex++) {
row = sheetForNewWB.createRow(rowIndex); //create row in this new sheet
for (int colIndex = 0; colIndex < sheetFromOldWB.getRow(rowIndex).getPhysicalNumberOfCells(); colIndex++) {
cell = row.createCell(colIndex); //create cell in this row of this new sheet
Cell c = sheetFromOldWB.getRow(rowIndex).getCell(colIndex, Row.CREATE_NULL_AS_BLANK ); //get cell from old/original WB's sheet and when cell is null, return it as blank cells. And Blank cell will be returned as Blank cells. That will not change.
if (c.getCellType() == Cell.CELL_TYPE_BLANK){
System.out.println("This is BLANK " + ((XSSFCell) c).getReference());
}
else { //Below is where all the copying is happening. First It copies the styles of each cell and then it copies the content.
CellStyle origStyle = c.getCellStyle();
newStyle.cloneStyleFrom(origStyle);
cell.setCellStyle(newStyle);
switch (c.getCellTypeEnum()) {
case STRING:
cell.setCellValue(c.getRichStringCellValue().getString());
break;
case NUMERIC:
if (DateUtil.isCellDateFormatted(cell)) {
cell.setCellValue(c.getDateCellValue());
} else {
cell.setCellValue(c.getNumericCellValue());
}
break;
case BOOLEAN:
cell.setCellValue(c.getBooleanCellValue());
break;
case FORMULA:
cell.setCellValue(c.getCellFormula());
break;
case BLANK:
cell.setCellValue("who");
break;
default:
System.out.println();
}
}
}
}
}
//Write over to the new file
FileOutputStream fileOut = new FileOutputStream("C:\\output.xlsx");
newWB.write(fileOut);
oldWB.close();
newWB.close();
fileOut.close();
如果您的要求是在不离开或添加任何内容的情况下复制整张纸。我认为消除过程比上面的代码更好，更快。而且您不必担心丢失公式，图纸，表格，样式，字体等。
XSSFWorkbook wb = new XSSFWorkbook("C:\\abc.xlsx");
for (int i = wb.getNumberOfSheets() - 1; i >= 0; i--) {
if (!wb.getSheetName(i).contentEquals("January")) //This is a place holder. You will insert your logic here to get the sheets that you want.
wb.removeSheetAt(i); //Just remove the sheets that don't match your criteria in the if statement above
}
FileOutputStream out = new FileOutputStream(new File("C:\\xyz.xlsx"));
wb.write(out);
out.close();
答案 5 :(得分：0)
最好的方法是打开文件并加载它。 如果要从源Excel文件中获取任何特定的工作表，则只需删除与预期工作表不匹配的工作表即可。
尝试一下：
FileInputStream fis=new FileInputStream("D:\\SourceExcel.xls");
Workbook wb=WorkbookFactory.create(fis);
for (int i = wb.getNumberOfSheets() - 1; i >= 0; i--) {
if (!wb.getSheetName(i).contentEquals("SheetNameWhichwantToRetain")) //This is a place holder. You will insert your logic here to get the sheets that you want.
wb.removeSheetAt(i); //Just remove the sheets that don't match your criteria in the if statement above
}
FileOutputStream fos = new FileOutputStream(new File("D:\\DestinationFileName.xls"));
wb.write(fos);
fos.close();
System.out.println("file is copied in a new file at destination :"+"D:\\DestinationFileName.xls");
}
catch(Exception e){
e.printStackTrace();
}
