POI读取excel适配07和03版本

03版读取


import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import java.util.concurrent.CopyOnWriteArrayList;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.util.CellRangeAddress;
import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;

public class ReadExcel03 {

    /**
     * 读取excel
     * @param is
     * @return
     * @throws FileNotFoundException
     * @throws IOException
     */
	public static  List<List<String>> readExcel(InputStream is)throws FileNotFoundException, IOException {
		// 构造 HSSFWorkbook 对象，传入参数为excel文件的io流
		HSSFWorkbook wb = new HSSFWorkbook(is);
		// 读取第一个sheet的内容
		HSSFSheet sheet = wb.getSheetAt(0);
		// 获取所有行的迭代对象
		Iterator<Row> rowIter = sheet.rowIterator();
		// 获取合并单元格对象的相关信息
		List<ExcelMergedRegionBean> mergedRegionMapList = new CopyOnWriteArrayList<ExcelMergedRegionBean>(getMergedRegionMapList(sheet));
		List<List<String>> contentList = new ArrayList<List<String>>();
		// 迭代所有行
		while (rowIter.hasNext()) {
			List<String> cellList = new ArrayList<String>();
			// 获取每一行
			Row row = rowIter.next();
			// 获取该行的列迭代对象
			Iterator<Cell> cellIter = row.cellIterator();
			// 迭代该行的每一列
			while (cellIter.hasNext()) {
				// 获取该行的每一列
				Cell cell = cellIter.next();
				// 获取该单元格的值
				String content = getActualCellValue(sheet, mergedRegionMapList,cell);
				cellList.add(content);

			}
			contentList.add(cellList);
		}
		return contentList;
	}
	/**
	 * 获取单元格真实的值
	 * @param sheet
	 * @param mergedRegionMapList
	 * @param myCell
	 * @return
	 */
	public static String getActualCellValue(HSSFSheet sheet,List<ExcelMergedRegionBean> mergedRegionMapList, Cell myCell) {

		Cell actualCell = myCell;

		// 迭代合并单元格对象，判断myCell该对象是否属于合并单元格
		for (ExcelMergedRegionBean mb : mergedRegionMapList) {

			if (myCell.getRowIndex() > mb.getLastRow()) {

				mergedRegionMapList.remove(mb);

			}

			// 判断myCell该对象是否属于合并单元格，如果是的话，则直接退出循环
			if (myCell.getColumnIndex() <= mb.getLastCell()
					&& myCell.getColumnIndex() >= mb.getFirstCell()
					&& myCell.getRowIndex() <= mb.getLastRow()
					&& myCell.getRowIndex() >= mb.getFirstRow()) {

				Row row = sheet.getRow(mb.getFirstRow());

				Cell cell = row.getCell(mb.getFirstCell());

				actualCell = cell;

				break;

			}

		}

		// 返回该单元对应的真实值
		return getCellValue(actualCell);

	}
	
	/**
	 * 处理合并的列
	 * @param sheet
	 * @return
	 */
	public static List<ExcelMergedRegionBean> getMergedRegionMapList(HSSFSheet sheet) {
		List<ExcelMergedRegionBean> mergedRegionMapList = new ArrayList<ExcelMergedRegionBean>();
		// 获得一个 sheet 中合并单元格的数量
		int sheetmergerCount = sheet.getNumMergedRegions();
		// 便利合并单元格
		for (int i = 0; i < sheetmergerCount; i++) {
			// 获得合并单元格
			CellRangeAddress ca = sheet.getMergedRegion(i);
			// 获得合并单元格的起始行, 结束行, 起始列, 结束列
			int firstC = ca.getFirstColumn();
			int lastC = ca.getLastColumn();
			int firstR = ca.getFirstRow();
			int lastR = ca.getLastRow();
			ExcelMergedRegionBean mb = new ExcelMergedRegionBean();
			mb.setFirstRow(firstR);
			mb.setLastRow(lastR);
			mb.setFirstCell(firstC);
			mb.setLastCell(lastC);
			mergedRegionMapList.add(mb);

		}

		// 排序，便于后面循环删除
		Collections.sort(mergedRegionMapList);
		return mergedRegionMapList;

	}
	/**
	 * 获得单元格的值
	 * @param cell
	 * @return
	 */
	public static String getCellValue(Cell cell) {
		String cellValue = "";
		if (cell.getCellType() == HSSFCell.CELL_TYPE_NUMERIC) {
			cellValue = rPadZeroUtil(String.valueOf(cell.getNumericCellValue()));
		} else if (cell.getCellType() == HSSFCell.CELL_TYPE_BOOLEAN) {
			cellValue = String.valueOf(cell.getBooleanCellValue());
		} else if (cell.getCellType() == HSSFCell.CELL_TYPE_STRING) {
			cellValue = cell.getStringCellValue();
		} else if (cell.getCellType() == HSSFCell.CELL_TYPE_FORMULA) {
			cellValue = String.valueOf(cell.getCellFormula());
		}
		return cellValue;
	}
	
	public static String rPadZeroUtil(String value) {
		if (value != null && !"".equals(value)) {
			if (value.endsWith(".0")) {
				return value.substring(0, value.indexOf(".0"));
			}
		}
		return value;
	}
}


07版读取



import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import java.util.concurrent.CopyOnWriteArrayList;

import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.util.CellRangeAddress;
import org.apache.poi.xssf.usermodel.XSSFCell;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;

public class ReadExcel07 {

	/**
	 * 读取excel
	 * @param is
	 * @return
	 * @throws FileNotFoundException
	 * @throws IOException
	 */
	public static  List<List<String>> readExcel(InputStream is)throws FileNotFoundException, IOException {
		// 构造 XSSFWorkbook 对象，传入参数为excel文件的io流
		XSSFWorkbook wb = new XSSFWorkbook(is);
		// 读取第一个sheet的内容
		XSSFSheet sheet = wb.getSheetAt(0);
		// 获取所有行的迭代对象
		Iterator<Row> rowIter = sheet.rowIterator();
		// 获取合并单元格对象的相关信息
		List<ExcelMergedRegionBean> mergedRegionMapList = new CopyOnWriteArrayList<ExcelMergedRegionBean>(getMergedRegionMapList(sheet));
		List<List<String>> contentList = new ArrayList<List<String>>();
		// 迭代所有行
		while (rowIter.hasNext()) {
			List<String> cellList = new ArrayList<String>();
			// 获取每一行
			Row row = rowIter.next();
			// 获取该行的列迭代对象
			Iterator<Cell> cellIter = row.cellIterator();
			// 迭代该行的每一列
			while (cellIter.hasNext()) {
				// 获取该行的每一列
				Cell cell = cellIter.next();
				// 获取该单元格的值
				String content = getActualCellValue(sheet, mergedRegionMapList,cell);
				cellList.add(content);

			}
			contentList.add(cellList);
		}
		return contentList;
	}

	/**
	 * 获取单元格真实的值
	 * @param sheet
	 * @param mergedRegionMapList
	 * @param myCell
	 * @return
	 */
	public static String getActualCellValue(XSSFSheet sheet,List<ExcelMergedRegionBean> mergedRegionMapList, Cell myCell) {
		Cell actualCell = myCell;
		// 迭代合并单元格对象，判断myCell该对象是否属于合并单元格
		for (ExcelMergedRegionBean mb : mergedRegionMapList) {
			if (myCell.getRowIndex() > mb.getLastRow()) {
				mergedRegionMapList.remove(mb);
			}

			// 判断myCell该对象是否属于合并单元格，如果是的话，则直接退出循环
			if (myCell.getColumnIndex() <= mb.getLastCell()
					&& myCell.getColumnIndex() >= mb.getFirstCell()
					&& myCell.getRowIndex() <= mb.getLastRow()
					&& myCell.getRowIndex() >= mb.getFirstRow()) {

				Row row = sheet.getRow(mb.getFirstRow());
				Cell cell = row.getCell(mb.getFirstCell());
				actualCell = cell;
				break;

			}

		}
		// 返回该单元对应的真实值
		return getCellValue(actualCell);

	}

	/**
	 * 处理有合并的列
	 * @param sheet
	 * @return
	 */
	public static List<ExcelMergedRegionBean> getMergedRegionMapList(XSSFSheet sheet) {

		List<ExcelMergedRegionBean> mergedRegionMapList = new ArrayList<ExcelMergedRegionBean>();
		// 获得一个 sheet 中合并单元格的数量
		int sheetmergerCount = sheet.getNumMergedRegions();
		// 便利合并单元格
		for (int i = 0; i < sheetmergerCount; i++) {
			// 获得合并单元格
			CellRangeAddress ca = sheet.getMergedRegion(i);
			// 获得合并单元格的起始行, 结束行, 起始列, 结束列
			int firstC = ca.getFirstColumn();//第一列
			int lastC = ca.getLastColumn();//最后一列
			int firstR = ca.getFirstRow();//第一行
			int lastR = ca.getLastRow();//第二行
			ExcelMergedRegionBean mb = new ExcelMergedRegionBean();
			mb.setFirstRow(firstR);
			mb.setLastRow(lastR);
			mb.setFirstCell(firstC);
			mb.setLastCell(lastC);
			mergedRegionMapList.add(mb);
		}

		// 排序，便于后面循环删除
		Collections.sort(mergedRegionMapList);
		return mergedRegionMapList;

	}

	/**
	 * 获得单元格的值
	 * @param cell
	 * @return
	 */
	public static String getCellValue(Cell cell) {
		String cellValue = "";
		if (cell.getCellType() == XSSFCell.CELL_TYPE_NUMERIC) 
			cellValue = String.valueOf(cell.getNumericCellValue());
		 else if (cell.getCellType() == XSSFCell.CELL_TYPE_BOOLEAN) 
			cellValue = String.valueOf(cell.getBooleanCellValue());
		else if (cell.getCellType() == XSSFCell.CELL_TYPE_STRING) 
			cellValue = cell.getStringCellValue();
		else if (cell.getCellType() == XSSFCell.CELL_TYPE_FORMULA) 
			cellValue = String.valueOf(cell.getCellFormula());
		
		return cellValue;
	}
}


适配器


import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.util.List;

/**
 * 读取excel适配器
 * @author Administrator
 *
 */
public class ReadExcelAdapter {

	private ReadExcelAdapter(){}
	/**
	 * 适配方法:可读取03版本和07版本的excel
	 * @return
	 */
	public static List<List<String>> readExcel(String filePath){
		InputStream is = null;
		try {
			is = new FileInputStream(filePath);
			return ReadExcel03.readExcel(is);
		} catch (Exception e) {
			try {
				is = new FileInputStream(filePath);
				return ReadExcel07.readExcel(is);
			} catch (FileNotFoundException e1) {
				e1.printStackTrace();
			} catch (IOException e3) {
				e3.printStackTrace();
			}
		}
		return null;
	}
}
测试类



import java.util.List;

public class ReadExcelTest {
	public static void main(String[] args) throws Exception {

		long startTime = System.currentTimeMillis();

		List<List<String>> result =  ReadExcelAdapter.readExcel("C:/test.xlsx");
        System.out.println(result);
        
		System.out.println("use time:"+ (System.currentTimeMillis() - startTime));
	}
}