Java 操作POI 之复制sheet页
来点干货直接上代码，就不细说了
package com.qs.web.tools.core.excel;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;
import java.util.TreeSet;
import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFCellStyle;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.ss.util.CellRangeAddress;
public class ExcelCopySheetUtil {
public ExcelCopySheetUtil() {
}
public static void copySheets(HSSFSheet newSheet, HSSFSheet sheet) {
copySheets(newSheet, sheet, true);
}
public static void copySheets(HSSFSheet newSheet, HSSFSheet sheet,
boolean copyStyle) {
int maxColumnNum = 0;
Map<Integer, HSSFCellStyle> styleMap = (copyStyle) ? new HashMap<Integer, HSSFCellStyle>()
: null;
for (int i = sheet.getFirstRowNum(); i <= sheet.getLastRowNum(); i++) {
HSSFRow srcRow = sheet.getRow(i);
HSSFRow destRow = newSheet.createRow(i);
if (srcRow != null) {
ExcelCopySheetUtil.copyRow(sheet, newSheet, srcRow, destRow,
styleMap);
if (srcRow.getLastCellNum() > maxColumnNum) {
maxColumnNum = srcRow.getLastCellNum();
}
}
}
for (int i = 0; i <= maxColumnNum; i++) { //设置列宽
newSheet.setColumnWidth(i, sheet.getColumnWidth(i));
}
}
/**
* 复制并合并单元格
* @param newSheet
* @param sheet
* @param copyStyle
*/
public static void copyRow(HSSFSheet srcSheet, HSSFSheet destSheet,
HSSFRow srcRow, HSSFRow destRow,
Map<Integer, HSSFCellStyle> styleMap) {
Set<CellRangeAddressWrapper> mergedRegions = new TreeSet<CellRangeAddressWrapper>();
destRow.setHeight(srcRow.getHeight());
int deltaRows = destRow.getRowNum() - srcRow.getRowNum(); //如果copy到另一个sheet的起始行数不同
for (int j = srcRow.getFirstCellNum(); j <= srcRow.getLastCellNum(); j++) {
HSSFCell oldCell = srcRow.getCell(j); // old cell
HSSFCell newCell = destRow.getCell(j); // new cell
if (oldCell != null) {
if (newCell == null) {
newCell = destRow.createCell(j);
}
copyCell(oldCell, newCell, styleMap);
CellRangeAddress mergedRegion = getMergedRegion(srcSheet,
srcRow.getRowNum(), (short) oldCell.getColumnIndex());
if (mergedRegion != null) {
CellRangeAddress newMergedRegion = new CellRangeAddress(
mergedRegion.getFirstRow() + deltaRows,
mergedRegion.getLastRow() + deltaRows, mergedRegion
.getFirstColumn(), mergedRegion
.getLastColumn());
CellRangeAddressWrapper wrapper = new CellRangeAddressWrapper(
newMergedRegion);
if (isNewMergedRegion(wrapper, mergedRegions)) {
mergedRegions.add(wrapper);
destSheet.addMergedRegion(wrapper.range);
}
}
}
}
}
/**
* 把原来的Sheet中cell（列）的样式和数据类型复制到新的sheet的cell（列）中 *
* @param oldCell
* @param newCell
* @param styleMap
*/
public static void copyCell(HSSFCell oldCell, HSSFCell newCell,
Map<Integer, HSSFCellStyle> styleMap) {
if (styleMap != null) {
if (oldCell.getSheet().getWorkbook() == newCell.getSheet()
.getWorkbook()) {
newCell.setCellStyle(oldCell.getCellStyle());
} else {
int stHashCode = oldCell.getCellStyle().hashCode();
HSSFCellStyle newCellStyle = styleMap.get(stHashCode);
if (newCellStyle == null) {
newCellStyle = newCell.getSheet().getWorkbook()
.createCellStyle();
newCellStyle.cloneStyleFrom(oldCell.getCellStyle());
styleMap.put(stHashCode, newCellStyle);
}
newCellStyle.setLocked(false);
newCell.setCellStyle(newCellStyle);
}
}
switch (oldCell.getCellType()) {
case HSSFCell.CELL_TYPE_STRING:
newCell.setCellValue(oldCell.getStringCellValue());
break;
case HSSFCell.CELL_TYPE_NUMERIC:
newCell.setCellValue(oldCell.getNumericCellValue());
break;
case HSSFCell.CELL_TYPE_BLANK:
newCell.setCellType(HSSFCell.CELL_TYPE_BLANK);
break;
case HSSFCell.CELL_TYPE_BOOLEAN:
newCell.setCellValue(oldCell.getBooleanCellValue());
break;
case HSSFCell.CELL_TYPE_ERROR:
newCell.setCellErrorValue(oldCell.getErrorCellValue());
break;
case HSSFCell.CELL_TYPE_FORMULA:
newCell.setCellFormula(oldCell.getCellFormula());
break;
default:
break;
}
}
// 获取merge对象
public static CellRangeAddress getMergedRegion(HSSFSheet 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;
}
private static boolean isNewMergedRegion(
CellRangeAddressWrapper newMergedRegion,
Set<CellRangeAddressWrapper> mergedRegions) {
boolean bool = mergedRegions.contains(newMergedRegion);
return !bool;
}
}