poi Excel复制指定行案例

一、poi excel复制指定行

    

package com.smart.test;

import java.io.FileInputStream;
import java.io.FileOutputStream;

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;
import org.apache.poi.hssf.util.Region;
import org.apache.poi.poifs.filesystem.POIFSFileSystem;

public class ExcelCopy {

	public static void main(String[] args) throws Exception {
		copyTemplate("Template.xls",
				"workbook.xls");
	}

	public static void copyTemplate(String exTemplateFilePath,
			String targetFilePath) throws Exception {
		POIFSFileSystem fs = new POIFSFileSystem(new FileInputStream(
				exTemplateFilePath));
		HSSFWorkbook wb = new HSSFWorkbook(fs);
		HSSFSheet sheet = wb.getSheetAt(0);
		int lastRow = sheet.getLastRowNum() + 1;

		copyRows(sheet, wb.getSheetAt(0), 1, lastRow, 20);

		FileOutputStream fileOut = new FileOutputStream(targetFilePath);
		wb.write(fileOut);
		fileOut.flush();
		fileOut.close();
	}

	@SuppressWarnings("all")
	public static void copyRows(HSSFSheet sourceSheet, HSSFSheet targetSheet,
			int startRow, int endRow, int targetPosition) {
		int pStartRow = startRow - 1;
		int pEndRow = endRow - 1;
		int pPosition = targetPosition - 1;
		HSSFRow sourceRow = null, targetRow = null;
		HSSFCell sourceCell = null, targetCell = null;
		Region region = null;
		int cType, i, j, targetRowFrom, targetRowTo;

		if (pStartRow < 0 || pEndRow < 0 || pStartRow > pEndRow) {
			return;
		}
		// 获取合并行单元格的数目,并设定目标单元格合并属性
		int mergedc = sourceSheet.getNumMergedRegions();
		for (i = 0; i < mergedc; i++) {
			region = sourceSheet.getMergedRegionAt(i);
			int rf = region.getRowFrom();
			int rt = region.getRowTo();
			if ((rf >= pStartRow) && (rt <= pEndRow)) {
				targetRowFrom = rf - pStartRow + pPosition;
				targetRowTo = rt - pStartRow + pPosition;
				region.setRowFrom(targetRowFrom);
				region.setRowTo(targetRowTo);
				targetSheet.addMergedRegion(region);
			}
		}
		//设定个单元格的列宽
		for (i = pStartRow; i <= pEndRow; i++) {
			sourceRow = sourceSheet.getRow(i);
			if (sourceRow != null) {
				int firstC = sourceRow.getFirstCellNum();
				for (j = sourceRow.getLastCellNum(); j > firstC; j--) {
					targetSheet
							.setColumnWidth(j, sourceSheet.getColumnWidth(j));
					targetSheet.setColumnHidden(j, false);
				}
				break;
			}
		}
		//填充数据
		for (; i <= pEndRow; i++) {
			sourceRow = sourceSheet.getRow(i);
			if (sourceRow == null) {
				continue;
			}

			targetRow = targetSheet.createRow(i - pStartRow + pPosition);
			targetRow.setHeight(sourceRow.getHeight());
			int psy = sourceRow.getPhysicalNumberOfCells();
			for (j = sourceRow.getFirstCellNum(); j < psy; j++) {
				sourceCell = sourceRow.getCell(j);
				if (sourceCell == null) {
					continue;
				}

				targetCell = targetRow.createCell(j);
				targetCell.setCellStyle(sourceCell.getCellStyle());
				cType = sourceCell.getCellType();
				targetCell.setCellType(cType);

				switch (cType) {
				case HSSFCell.CELL_TYPE_BOOLEAN:
					targetCell.setCellValue(sourceCell.getBooleanCellValue());
					break;
				case HSSFCell.CELL_TYPE_ERROR:
					targetCell
							.setCellErrorValue(sourceCell.getErrorCellValue());
					break;
				case HSSFCell.CELL_TYPE_FORMULA:
					targetCell.setCellFormula(parseFormula(sourceCell
							.getCellFormula()));
					break;
				case HSSFCell.CELL_TYPE_NUMERIC:
					targetCell.setCellValue(sourceCell.getNumericCellValue());
					break;
				case HSSFCell.CELL_TYPE_STRING:
					targetCell
							.setCellValue(sourceCell.getRichStringCellValue());
					break;
				}
			}
		}
	}

	private static String parseFormula(String pPOIFormula) {
		final String cstReplaceString = "ATTR(semiVolatile)"; //$NON-NLS-1$ 
		StringBuffer result = null;
		int index;
		result = new StringBuffer();
		index = pPOIFormula.indexOf(cstReplaceString);
		if (index >= 0) {
			result.append(pPOIFormula.substring(0, index));
			result.append(pPOIFormula.substring(index
					+ cstReplaceString.length()));
		} else {
			result.append(pPOIFormula);
		}
		return result.toString();
	}
}