POI解析读写EXCEL,复制SHEET,兼容EXCEL93－2003，2007

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.ss.util.CellRangeAddress;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;

public class ExcelTest {

	private static final String EXL_2003 = "C:\\Users\\Administrator\\Desktop\\sale2003.xls";
	private static final String EXL_2007 = "C:\\Users\\Administrator\\Desktop\\sale2007.xlsx";

	public static void main(String[] args){
		try {
			test(EXL_2003);
			test(EXL_2007);
		} catch (Exception e) {
			System.out.println("请检查EXCEL文件及格式!!");
		}
	}

	private static void test(String file) throws Exception  {
		Workbook wb = null;
		if (file.endsWith(".xlsx")) {//EXCEL2007
			wb = new XSSFWorkbook(new FileInputStream(new File(file)));
		}else if(file.endsWith(".xls")){//EXCEL97-2003
			wb = new HSSFWorkbook(new FileInputStream(new File(file)));
		}else{
			throw new Exception("");
		}

		if(wb.getNumberOfSheets() > 1){
			wb.removeSheetAt(1);
		}

		//单元格合并
		CellRangeAddress region = null;
		Sheet sheet1 = wb.getSheetAt(0);
		Sheet sheet2 = wb.createSheet(sheet1.getSheetName() + "_副本");
		for (int i = 0; i < sheet1.getNumMergedRegions(); i++) {
			region = sheet1.getMergedRegion(i);
			if ((region.getFirstColumn() >= sheet1.getFirstRowNum())
					&& (region.getLastRow() <= sheet1.getLastRowNum())) {
				sheet2.addMergedRegion(region);
			}
		}

		//复制内容
		Row rowFrom = null;
		Row rowTo = null;
		Cell cellFrom = null;
		Cell cellTo = null;
		for (int i = sheet1.getFirstRowNum(); i < sheet1.getLastRowNum(); i++) {
			rowFrom = sheet1.getRow(i);
			if (null == rowFrom){
				continue;
			}

			rowTo = sheet2.createRow(i);
			rowTo.setHeight(rowFrom.getHeight());
			for (int j = 0; j < rowFrom.getLastCellNum(); j++) {
				sheet2.setColumnWidth(j, sheet1.getColumnWidth(j));
				if(null != sheet1.getColumnStyle(j)){
					sheet2.setDefaultColumnStyle(j, sheet1.getColumnStyle(j));
				}

				cellFrom = rowFrom.getCell(j);
				if (null == cellFrom){
					continue;
				}

				cellTo = rowTo.createCell(j);
				cellTo.setCellStyle(cellFrom.getCellStyle());
				cellTo.setCellType(cellFrom.getCellType());

				if(Cell.CELL_TYPE_STRING == cellFrom.getCellType()){
					cellTo.setCellValue(cellFrom.getStringCellValue());
				}else if(Cell.CELL_TYPE_NUMERIC == cellFrom.getCellType()){
					cellTo.setCellValue(cellFrom.getNumericCellValue());
				}
			}
		}

		sheet2.setDisplayGridlines(true);//
		FileOutputStream fileOut = new FileOutputStream(file);
		wb.write(fileOut);
        fileOut.close(); 

        System.out.println(file + " 复制sheet成功!");
	}

}

本人没装EXCEL2007以上版本，不知是否向上兼容