读取excel

尝试了jxl和poi

首先 jxl

package excel;

import java.io.File;

import jxl.Cell;
import jxl.CellType;
import jxl.Sheet;
import jxl.Workbook;

public class Jxl {

	public static void main(String[] args) {
		Sheet sheet;
		Workbook book;
		Cell cell1;
		try {
			// t.xls为要读取的excel文件名
			book = Workbook.getWorkbook(new File("src//main//resources//test.xls"));
			// 获得第一个工作表对象(ecxel中sheet的编号从0开始,0,1,2,3,....)
			sheet = book.getSheet(0);
			// 获取左上角的单元格
			cell1 = sheet.getCell(0, 0);
			System.out.println("标题:" + cell1.getContents());
			//获取表格的总行数
			int rows = sheet.getRows();
			int cols = sheet.getColumns();
			//读取表格的内容
			for(int i=1;i<rows;i++){
				// 获取每一行的单元格
				for(int j=0;j<cols;j++){
					Cell cell = sheet.getCell(j,i);// (列,行)
//					System.out.println(cell1.getType());
//					System.out.println(CellType.LABEL);
					if ("".equals(cell.getContents()) == true) // 如果读取的数据为空
						break;
					System.out.print(cell.getContents() + "\t");
				}
				System.out.println("");
			}
			book.close();
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
}
上述代码未对单元格的数据进行类型的判定,直接获取string


poi:

package excel;

import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.text.SimpleDateFormat;
import java.util.Date;

import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFDateUtil;
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.poifs.filesystem.POIFSFileSystem;

/**
 * 操作Excel表格的功能类
 */
public class Poi {

	/**
	 * 获取单元格数据内容为字符串类型的数据
	 * 
	 * @param cell
	 *            Excel单元格
	 * @return String 单元格数据内容
	 */
	private String getStringCellValue(HSSFCell cell) {
		String strCell = "";
		switch (cell.getCellType()) {
		case HSSFCell.CELL_TYPE_STRING:
			strCell = cell.getStringCellValue();
			break;
		case HSSFCell.CELL_TYPE_NUMERIC:
			strCell = String.valueOf(cell.getNumericCellValue());
			break;
		case HSSFCell.CELL_TYPE_BOOLEAN:
			strCell = String.valueOf(cell.getBooleanCellValue());
			break;
		case HSSFCell.CELL_TYPE_BLANK:
			strCell = "";
			break;
		default:
			strCell = "";
			break;
		}
		if (strCell.equals("") || strCell == null) {
			return "";
		}
		return strCell;
	}

	/**
	 * 获取单元格数据内容为日期类型的数据
	 * 
	 * @param cell
	 *            Excel单元格
	 * @return String 单元格数据内容
	 */
	@SuppressWarnings({ "deprecation", "unused" })
	private String getDateCellValue(HSSFCell cell) {
		String result = "";
		try {
			int cellType = cell.getCellType();
			if (cellType == HSSFCell.CELL_TYPE_NUMERIC) {
				Date date = cell.getDateCellValue();
				result = (date.getYear() + 1900) + "-" + (date.getMonth() + 1)
						+ "-" + date.getDate();
			} else if (cellType == HSSFCell.CELL_TYPE_STRING) {
				String date = getStringCellValue(cell);
				result = date.replaceAll("[年月]", "-").replace("日", "").trim();
			} else if (cellType == HSSFCell.CELL_TYPE_BLANK) {
				result = "";
			}
		} catch (Exception e) {
			System.out.println("日期格式不正确!");
			e.printStackTrace();
		}
		return result;
	}

	/**
	 * 根据HSSFCell类型设置数据
	 * 
	 * @param cell
	 * @return
	 */
	private static String getCellFormatValue(HSSFCell cell) {
		String cellvalue = "";
		if (cell != null) {
			// 判断当前Cell的Type
			switch (cell.getCellType()) {
			// 如果当前Cell的Type为NUMERIC
			case HSSFCell.CELL_TYPE_NUMERIC:
			case HSSFCell.CELL_TYPE_FORMULA: {
				// 判断当前的cell是否为Date
				if (HSSFDateUtil.isCellDateFormatted(cell)) {
					// 如果是Date类型则,转化为Data格式

					// 方法1:这样子的data格式是带时分秒的:2011-10-12 0:00:00
					// cellvalue = cell.getDateCellValue().toLocaleString();

					// 方法2:这样子的data格式是不带带时分秒的:2011-10-12
					Date date = cell.getDateCellValue();
					SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
					cellvalue = sdf.format(date);

				}
				// 如果是纯数字
				else {
					// 取得当前Cell的数值
					cellvalue = String.valueOf(cell.getNumericCellValue());
				}
				break;
			}
			// 如果当前Cell的Type为STRIN
			case HSSFCell.CELL_TYPE_STRING:
				// 取得当前的Cell字符串
				cellvalue = cell.getRichStringCellValue().getString();
				break;
			// 默认的Cell值
			default:
				cellvalue = " ";
			}
		} else {
			cellvalue = "";
		}
		return cellvalue;

	}

	@SuppressWarnings("deprecation")
	public static void main(String[] args) {
		POIFSFileSystem fs;
		HSSFWorkbook wb = null;
		HSSFSheet sheet;
		HSSFRow row;
		try {
			InputStream is = new FileInputStream(
					"src//main//resources//test2.xls");
			fs = new POIFSFileSystem(is);
			wb = new HSSFWorkbook(fs);
			sheet = wb.getSheetAt(0);
			row = sheet.getRow(0);
			// 标题总列数
			int colNum = row.getPhysicalNumberOfCells();
			System.out.println("colNum:" + colNum);
			System.out.print("标题:");
			for (int i = 0; i < colNum; i++) {
				// title[i] = getStringCellValue(row.getCell((short) i));
				System.out.print(getCellFormatValue(row.getCell((short) i))+"\t");
			}
			System.out.println("");
			// 正文内容应该从第二行开始,第一行为表头的标题
			// 得到总行数
			int rowNum = sheet.getLastRowNum();
			for (int i = 1; i <= rowNum; i++) {
				row = sheet.getRow(i);
				int j = 0;
				while (j < colNum) {
					// 每个单元格的数据内容用"-"分割开,以后需要时用String类的replace()方法还原数据
					// 也可以将每个单元格的数据设置到一个javabean的属性中,此时需要新建一个javabean
					// str += getStringCellValue(row.getCell((short) j)).trim() +
					// "-";
					System.out.print(getCellFormatValue(row.getCell((short) j)).trim() + "\t");
					j++;
				}
				System.out.println("");
			}
		} catch (IOException e) {
			e.printStackTrace();
		}
	}
}


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