我有一个Java代码可生成一堆工作簿，并希望将它们全部复制到一个工作簿中。
此问题的原始答案发布在：
答案 0 :(得分：0)
我最初的想法是使用XSSFWorkbook的cloneSheet方法来完成操作，我成功复制了Relations and Drawings，但是未能复制数据本身。为什么？因为XSSFSheet的方法读写是受保护的，所以我通过扩展XSSFSheet并公开了这两种方法来提出了自己的XSSFSheet版本，但这意味着我将不得不使用XSSFSheet替换来复制和编辑每个源文件。加上我的XSSFSheet版本，这意味着太多的编码，而我没有足够的时间进行项目。
此问题的原始答案发布在：
How to copy a sheet between Excel workbooks in Java
但是，我的项目要求不同，所以我即兴回答。
我添加了一个称为Combine的方法，该方法接受目标工作簿和源工作簿。
这些方法循环遍历源工作簿中的所有工作表，并将它们添加到目标工作簿中。最初的答案缺少复制关系和图纸。
我也要从缺少页脚的工作簿中复制工作簿，需要关闭需要的网格线并适合页面。所以这是我的解决方法
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.TreeSet;
import org.apache.poi.POIXMLDocumentPart;
import org.apache.poi.POIXMLDocumentPart.RelationPart;
import org.apache.poi.POIXMLException;
import org.apache.poi.openxml4j.exceptions.InvalidFormatException;
import org.apache.poi.openxml4j.opc.PackageRelationship;
import org.apache.poi.openxml4j.opc.TargetMode;
import org.apache.poi.ss.usermodel.CellStyle;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.util.CellRangeAddress;
import org.apache.poi.util.POILogger;
import org.apache.poi.xssf.usermodel.XSSFCell;
import org.apache.poi.xssf.usermodel.XSSFDrawing;
import org.apache.poi.xssf.usermodel.XSSFRelation;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.openxmlformats.schemas.spreadsheetml.x2006.main.CTWorksheet;
import com.hcsc.eas.framework.services.logging.Logger;
public class XSSFWorkbookHelper {
static protected Logger logger = Logger.getLogger(XSSFWorkbookHelper.class.getName());
public static void combine(XSSFWorkbook tgt, XSSFWorkbook src) throws InvalidFormatException {
// begin sheets loop
boolean first=true;
String firstSheetName = null;
XSSFSheet tgtSheet = null;
for (int i = 0; i < src.getNumberOfSheets(); i++) {
XSSFSheet srcSheet = src.getSheetAt(i);
String sheetName = srcSheet.getSheetName().replaceAll("_", "-");
if (first) {
firstSheetName = srcSheet.getSheetName();
if (sheetName.equals(firstSheetName)) sheetName = sheetName + "_";
first = false;
}
tgtSheet = tgt.createSheet(sheetName);
copyRelations(tgtSheet, srcSheet);
copySheets(tgtSheet, srcSheet);
} // end sheets loop
tgtSheet = tgt.getSheet(firstSheetName);
if(tgtSheet != null) {
tgt.removeSheetAt(tgt.getSheetIndex(tgtSheet));
}
}
private static void copyRelations(XSSFSheet tgtSheet,XSSFSheet srcSheet) {
// copy sheet's relations
List<RelationPart> rels = srcSheet.getRelationParts();
// if the sheet being cloned has a drawing then rememebr it and re-create it too
XSSFDrawing dg = null;
for(RelationPart rp : rels) {
POIXMLDocumentPart r = rp.getDocumentPart();
// do not copy the drawing relationship, it will be re-created
if(r instanceof XSSFDrawing) {
dg = (XSSFDrawing)r;
continue;
}
addRelation(rp, tgtSheet);
}
try {
for(PackageRelationship pr : srcSheet.getPackagePart().getRelationships()) {
if (pr.getTargetMode() == TargetMode.EXTERNAL) {
tgtSheet.getPackagePart().addExternalRelationship
(pr.getTargetURI().toASCIIString(), pr.getRelationshipType(), pr.getId());
}
}
} catch (InvalidFormatException e) {
throw new POIXMLException("Failed to clone sheet", e);
}
CTWorksheet ct = tgtSheet.getCTWorksheet();
if(ct.isSetLegacyDrawing()) {
logger.warn(POILogger.WARN + "Cloning sheets with comments is not yet supported.");
ct.unsetLegacyDrawing();
}
if (ct.isSetPageSetup()) {
logger.warn(POILogger.WARN + "Cloning sheets with page setup is not yet supported.");
ct.unsetPageSetup();
}
tgtSheet.setSelected(false);
// clone the sheet drawing alongs with its relationships
if (dg != null) {
if(ct.isSetDrawing()) {
// unset the existing reference to the drawing,
// so that subsequent call of tgtSheet.createDrawingPatriarch() will create a new one
ct.unsetDrawing();
}
XSSFDrawing clonedDg = tgtSheet.createDrawingPatriarch();
// copy drawing contents
clonedDg.getCTDrawing().set(dg.getCTDrawing());
clonedDg = tgtSheet.createDrawingPatriarch();
// Clone drawing relations
List<RelationPart> srcRels = srcSheet.createDrawingPatriarch().getRelationParts();
for (RelationPart rp : srcRels) {
addRelation(rp, clonedDg);
}
}
}
private static void addRelation(RelationPart rp, POIXMLDocumentPart target) {
PackageRelationship rel = rp.getRelationship();
if (rel.getTargetMode() == TargetMode.EXTERNAL) {
target.getPackagePart().addRelationship(rel.getTargetURI(), rel.getTargetMode(), rel.getRelationshipType(),
rel.getId());
} else {
XSSFRelation xssfRel = XSSFRelation.getInstance(rel.getRelationshipType());
if (xssfRel == null) {
// Don't copy all relations blindly, but only the ones we know
// about
throw new POIXMLException(
"Can't clone sheet - unknown relation type found: " + rel.getRelationshipType());
}
target.addRelation(rel.getId(), xssfRel, rp.getDocumentPart());
}
}
/**
* @param newSheet
* the sheet to create from the copy.
* @param sheet
* the sheet to copy.
*/
public static void copySheets(XSSFSheet newSheet, XSSFSheet sheet) {
copySheets(newSheet, sheet, true);
}
/**
* @param newSheet
* the sheet to create from the copy.
* @param sheet
* the sheet to copy.
* @param copyStyle
* true copy the style.
*/
public static void copySheets(XSSFSheet newSheet, XSSFSheet sheet, boolean copyStyle) {
setupSheet(newSheet);
int maxColumnNum = 0;
Map<Integer, CellStyle> styleMap = (copyStyle) ? new HashMap<Integer, CellStyle>() : null;
for (int i = sheet.getFirstRowNum(); i <= sheet.getLastRowNum(); i++) {
XSSFRow srcRow = sheet.getRow(i);
XSSFRow destRow = newSheet.createRow(i);
if (srcRow != null) {
copyRow(sheet, newSheet, srcRow, destRow, styleMap);
if (srcRow.getLastCellNum() > maxColumnNum) {
maxColumnNum = srcRow.getLastCellNum();
}
}
}
for (int i = 0; i <= maxColumnNum; i++) {
newSheet.setColumnWidth(i, sheet.getColumnWidth(i));
}
}
public static void setupSheet(XSSFSheet newSheet) {
newSheet.getFooter().setCenter("&7 _x0000_ A Division of Health Care Service Corporation, a Mutual Legal Reserve Company, \n _x0000_ an Independent Licensee of the Blue Cross and Blue Shield Association");
newSheet.setDisplayGridlines(false);
newSheet.setMargin(Sheet.RightMargin, 0.5 /* inches */ );
newSheet.setMargin(Sheet.LeftMargin, 0.5 /* inches */ );
newSheet.setMargin(Sheet.TopMargin, 0.5 /* inches */ );
newSheet.setMargin(Sheet.BottomMargin, 0.5 /* inches */ );
newSheet.setFitToPage(true);
}
/**
* @param srcSheet
* the sheet to copy.
* @param destSheet
* the sheet to create.
* @param srcRow
* the row to copy.
* @param destRow
* the row to create.
* @param styleMap
* -
*/
public static void copyRow(XSSFSheet srcSheet, XSSFSheet destSheet, XSSFRow srcRow, XSSFRow destRow,
Map<Integer, CellStyle> styleMap) {
try {
// manage a list of merged zone in order to not insert two times a
// merged zone
Set<CellRangeAddressWrapper> mergedRegions = new TreeSet<CellRangeAddressWrapper>();
destRow.setHeight(srcRow.getHeight());
// reckoning delta rows
int deltaRows = destRow.getRowNum() - srcRow.getRowNum();
// pour chaque row
for (int j = srcRow.getFirstCellNum(); j <= srcRow.getLastCellNum(); j++) {
XSSFCell oldCell = srcRow.getCell(j); // ancienne cell
XSSFCell newCell = destRow.getCell(j); // new cell
if (oldCell != null) {
if (newCell == null) {
newCell = destRow.createCell(j);
}
// copy chaque cell
copyCell(oldCell, newCell, styleMap);
// copy les informations de fusion entre les cellules
// System.out.println("row num: " + srcRow.getRowNum() + " ,
// col: " + (short)oldCell.getColumnIndex());
CellRangeAddress mergedRegion = getMergedRegion(srcSheet, srcRow.getRowNum(),
(short) oldCell.getColumnIndex());
if (mergedRegion != null) {
// System.out.println("Selected merged region: " +
// mergedRegion.toString());
CellRangeAddress newMergedRegion = new CellRangeAddress(mergedRegion.getFirstRow() + deltaRows,
mergedRegion.getLastRow() + deltaRows, mergedRegion.getFirstColumn(),
mergedRegion.getLastColumn());
// System.out.println("New merged region: " +
// newMergedRegion.toString());
CellRangeAddressWrapper wrapper = new CellRangeAddressWrapper(newMergedRegion);
if (isNewMergedRegion(wrapper, mergedRegions)) {
mergedRegions.add(wrapper);
destSheet.addMergedRegion(wrapper.range);
}
}
}
}
} catch (Exception e) {
//e.printStackTrace();
logger.warn(POILogger.WARN + "merge area failure, happens when a merge area overlaps.");
}
}
/**
* @param oldCell
* @param newCell
* @param styleMap
*/
public static void copyCell(XSSFCell oldCell, XSSFCell newCell, Map<Integer, CellStyle> styleMap) {
if (styleMap != null) {
if (oldCell.getSheet().getWorkbook() == newCell.getSheet().getWorkbook()) {
newCell.setCellStyle(oldCell.getCellStyle());
} else {
int stHashCode = oldCell.getCellStyle().hashCode();
CellStyle newCellStyle = styleMap.get(stHashCode);
if (newCellStyle == null) {
newCellStyle = newCell.getSheet().getWorkbook().createCellStyle();
newCellStyle.cloneStyleFrom(oldCell.getCellStyle());
styleMap.put(stHashCode, newCellStyle);
}
newCell.setCellStyle(newCellStyle);
}
}
switch (oldCell.getCellType()) {
case XSSFCell.CELL_TYPE_STRING:
newCell.setCellValue(oldCell.getStringCellValue());
break;
case XSSFCell.CELL_TYPE_NUMERIC:
newCell.setCellValue(oldCell.getNumericCellValue());
break;
case XSSFCell.CELL_TYPE_BLANK:
newCell.setCellType(XSSFCell.CELL_TYPE_BLANK);
break;
case XSSFCell.CELL_TYPE_BOOLEAN:
newCell.setCellValue(oldCell.getBooleanCellValue());
break;
case XSSFCell.CELL_TYPE_ERROR:
newCell.setCellErrorValue(oldCell.getErrorCellValue());
break;
case XSSFCell.CELL_TYPE_FORMULA:
newCell.setCellFormula(oldCell.getCellFormula());
break;
default:
break;
}
}
/**
* Retrieves cell merge information in the source sheet
* to apply them to the destination sheet ... Get all zones
* merged in the source sheet and look for each of them if she
* find in the current row that we are dealing. If yes, return the object
* CellRangeAddress.
*
* @param sheet
* the sheet containing the data.
* @param rowNum
* the num of the row to copy.
* @param cellNum
* the num of the cell to copy.
* @return the CellRangeAddress created.
*/
public static CellRangeAddress getMergedRegion(XSSFSheet sheet, int rowNum, short cellNum) {
for (int i = 0; i < sheet.getNumMergedRegions(); i++) {
CellRangeAddress merged = sheet.getMergedRegion(i);
if (merged.isInRange(rowNum, cellNum)) {
return merged;
}
}
return null;
}
/**
* Check that the merged region has been created in the destination sheet.
*
* @param newMergedRegion
* the merged region to copy or not in the destination sheet.
* @param mergedRegions
* the list containing all the merged region.
* @return true if the merged region is already in the list or not.
*/
private static boolean isNewMergedRegion(CellRangeAddressWrapper newMergedRegion,
Set<CellRangeAddressWrapper> mergedRegions) {
return !mergedRegions.contains(newMergedRegion);
}
}
class CellRangeAddressWrapper implements Comparable<CellRangeAddressWrapper> {
public CellRangeAddress range;
/**
* @param theRange
* the CellRangeAddress object to wrap.
*/
public CellRangeAddressWrapper(CellRangeAddress theRange) {
this.range = theRange;
}
/**
* @param o
* the object to compare.
* @return -1 the current instance is prior to the object in parameter, 0:
* equal, 1: after...
*/
public int compareTo(CellRangeAddressWrapper o) {
if (range.getFirstColumn() < o.range.getFirstColumn() && range.getFirstRow() < o.range.getFirstRow()) {
return -1;
} else if (range.getFirstColumn() == o.range.getFirstColumn() && range.getFirstRow() == o.range.getFirstRow()) {
return 0;
} else {
return 1;
}
}
}