poi操作excel，复制sheet，复制行，复制单元格

项目中，我们经常使用Poi来操作excel，但是经常碰到一个不方便的地方，不如最简单常用的，在两个excel之间复制sheet，复制行，复制单元格等。

源码如下：

public class POIUtils {
//  /**
//   * 把一个excel中的cellstyletable复制到另一个excel，这里会报错，不能用这种方法，不明白呀？？？？？
//   * @param fromBook
//   * @param toBook
//   */
//  public static void copyBookCellStyle(HSSFWorkbook fromBook,HSSFWorkbook toBook){
//      for(short i=0;i<fromBook.getNumCellStyles();i++){
//          HSSFCellStyle fromStyle=fromBook.getCellStyleAt(i);
//          HSSFCellStyle toStyle=toBook.getCellStyleAt(i);
//          if(toStyle==null){
//              toStyle=toBook.createCellStyle();
//          }
//          copyCellStyle(fromStyle,toStyle);
//      }
//  }
/**
* 复制一个单元格样式到目的单元格样式
* @param fromStyle
* @param toStyle
*/
public static void copyCellStyle(HSSFCellStyle fromStyle,
HSSFCellStyle toStyle) {
toStyle.setAlignment(fromStyle.getAlignment());
//边框和边框颜色
toStyle.setBorderBottom(fromStyle.getBorderBottom());
toStyle.setBorderLeft(fromStyle.getBorderLeft());
toStyle.setBorderRight(fromStyle.getBorderRight());
toStyle.setBorderTop(fromStyle.getBorderTop());
toStyle.setTopBorderColor(fromStyle.getTopBorderColor());
toStyle.setBottomBorderColor(fromStyle.getBottomBorderColor());
toStyle.setRightBorderColor(fromStyle.getRightBorderColor());
toStyle.setLeftBorderColor(fromStyle.getLeftBorderColor());

//背景和前景
toStyle.setFillBackgroundColor(fromStyle.getFillBackgroundColor());
toStyle.setFillForegroundColor(fromStyle.getFillForegroundColor());

toStyle.setDataFormat(fromStyle.getDataFormat());
toStyle.setFillPattern(fromStyle.getFillPattern());
//      toStyle.setFont(fromStyle.getFont(null));
toStyle.setHidden(fromStyle.getHidden());
toStyle.setIndention(fromStyle.getIndention());//首行缩进
toStyle.setLocked(fromStyle.getLocked());
toStyle.setRotation(fromStyle.getRotation());//旋转
toStyle.setVerticalAlignment(fromStyle.getVerticalAlignment());
toStyle.setWrapText(fromStyle.getWrapText());

}
/**
* Sheet复制
* @param fromSheet
* @param toSheet
* @param copyValueFlag
*/
public static void copySheet(HSSFWorkbook wb,HSSFSheet fromSheet, HSSFSheet toSheet,
boolean copyValueFlag) {
//合并区域处理
mergerRegion(fromSheet, toSheet);
for (Iterator rowIt = fromSheet.rowIterator(); rowIt.hasNext();) {
HSSFRow tmpRow = (HSSFRow) rowIt.next();
HSSFRow newRow = toSheet.createRow(tmpRow.getRowNum());
//行复制
copyRow(wb,tmpRow,newRow,copyValueFlag);
}
}
/**
* 行复制功能
* @param fromRow
* @param toRow
*/
public static void copyRow(HSSFWorkbook wb,HSSFRow fromRow,HSSFRow toRow,boolean copyValueFlag){
for (Iterator cellIt = fromRow.cellIterator(); cellIt.hasNext();) {
HSSFCell tmpCell = (HSSFCell) cellIt.next();
HSSFCell newCell = toRow.createCell(tmpCell.getCellNum());
copyCell(wb,tmpCell, newCell, copyValueFlag);
}
}
/**
* 复制原有sheet的合并单元格到新创建的sheet
*
* @param sheetCreat 新创建sheet
* @param sheet      原有的sheet
*/
public static void mergerRegion(HSSFSheet fromSheet, HSSFSheet toSheet) {
int sheetMergerCount = fromSheet.getNumMergedRegions();
for (int i = 0; i < sheetMergerCount; i++) {
Region mergedRegionAt = fromSheet.getMergedRegionAt(i);
toSheet.addMergedRegion(mergedRegionAt);
}
}
/**
* 复制单元格
*
* @param srcCell
* @param distCell
* @param copyValueFlag
*            true则连同cell的内容一起复制
*/
public static void copyCell(HSSFWorkbook wb,HSSFCell srcCell, HSSFCell distCell,
boolean copyValueFlag) {
HSSFCellStyle newstyle=wb.createCellStyle();
copyCellStyle(srcCell.getCellStyle(), newstyle);
distCell.setEncoding(srcCell.getEncoding());
//样式
distCell.setCellStyle(newstyle);
//评论
if (srcCell.getCellComment() != null) {
distCell.setCellComment(srcCell.getCellComment());
}
// 不同数据类型处理
int srcCellType = srcCell.getCellType();
distCell.setCellType(srcCellType);
if (copyValueFlag) {
if (srcCellType == HSSFCell.CELL_TYPE_NUMERIC) {
if (HSSFDateUtil.isCellDateFormatted(srcCell)) {
distCell.setCellValue(srcCell.getDateCellValue());
} else {
distCell.setCellValue(srcCell.getNumericCellValue());
}
} else if (srcCellType == HSSFCell.CELL_TYPE_STRING) {
distCell.setCellValue(srcCell.getRichStringCellValue());
} else if (srcCellType == HSSFCell.CELL_TYPE_BLANK) {
// nothing21
} else if (srcCellType == HSSFCell.CELL_TYPE_BOOLEAN) {
distCell.setCellValue(srcCell.getBooleanCellValue());
} else if (srcCellType == HSSFCell.CELL_TYPE_ERROR) {
distCell.setCellErrorValue(srcCell.getErrorCellValue());
} else if (srcCellType == HSSFCell.CELL_TYPE_FORMULA) {
distCell.setCellFormula(srcCell.getCellFormula());
} else { // nothing29
}
}
}
}