Java 使用 POI 解析 EXCEL 2003 2007

MAVEN POI

    
      org.apache.poi
      poi
      3.15
    

    
    
      org.apache.poi
      poi-ooxml
      3.15
    

代码:

package zy.learn.one;

import java.io.IOException;
import java.io.InputStream;
import java.text.DecimalFormat;
import java.text.SimpleDateFormat;
import java.util.List;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.util.ArrayList;
import java.util.Date;
import java.util.LinkedHashMap;
import java.util.Map;

import org.apache.poi.hssf.usermodel.HSSFDataFormat;
import org.apache.poi.hssf.usermodel.HSSFDateUtil;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.CellStyle;
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.xssf.usermodel.XSSFWorkbook;

public class Main {

	public static void main(String[] args) {
		analysis("D://test.xlsx");
	}

	
	/**
	 *   用来解析  excel 文件
	 * @param filePath  文件路径
	 * @return
	 */
	public static  List> analysis(String filePath) {
		Workbook workbook = null;
		Sheet sheet = null;
		Row row = null;
		List> list = null;
		String cellData = null;


		// 用来存储第一行 (列名行)
		ArrayList arrayList = new ArrayList();

		workbook = readExcel(filePath);

		if (workbook != null) {

			// 用来存放表中数据
			list = new ArrayList>();
			// 获取第一个sheet
			sheet = workbook.getSheetAt(0);

			// 获取最大行数
			int rownum = sheet.getPhysicalNumberOfRows();
			// 获取第一行
			row = sheet.getRow(0);

			// 获取最大列数
			int colnum = row.getPhysicalNumberOfCells();
			// 把所有的行的名字都添加到集合中
			for (int i = 0; i < colnum; i++) {
				arrayList.add(String.valueOf(row.getCell(i)));
			}
			for (int i = 1; i < rownum; i++) {
				// 用map 来临时存储 遍历出来一列的值
				Map map = new LinkedHashMap();
				row = sheet.getRow(i);
				if (row != null) {
					for (int j = 0; j < colnum; j++) {
						cellData = (String) getCellFormatValue(row.getCell(j));
						map.put(arrayList.get(j), cellData);
					}
				} else {
					break;
				}
				list.add(map);
			}
		}
		System.out.println(list);
		return list;
		
	}

	/**
	 * 读取excel 文件内数据
	 * 
	 * @param filePath   文件路径
	 * @return
	 */
	public static Workbook readExcel(String filePath) {
		Workbook workbook = null;
		if (filePath == null) {
			return null;
		}
		// 判断文件是以什么 xls 还是 xlsx 保存
		String extString = filePath.substring(filePath.lastIndexOf("."));
		InputStream is = null;
		try {
			is = new FileInputStream(filePath);
			if (".xls".equals(extString)) {
				return workbook = new HSSFWorkbook(is);
			} else if (".xlsx".equals(extString)) {
				return workbook = new XSSFWorkbook(is);
			} else {
				workbook = null;
			}
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
		return workbook;
	}

	/**
	 * 判断单元格的内容 属于什么类型的数据 相应进行转换
	 * 
	 * @param cell     数据对象
	 * @return
	 */
	public static Object getCellFormatValue(Cell cell) {
		Object cellValue = null;
		if (cell != null) {
			// 判断cell类型
			switch (cell.getCellType()) {
			case Cell.CELL_TYPE_NUMERIC: // 数字
				cellValue = stringDateProcess(cell);
				break;
			case Cell.CELL_TYPE_STRING: // 字符串
				cellValue = String.valueOf(cell.getStringCellValue());
				break;
			case Cell.CELL_TYPE_BOOLEAN: // Boolean
				cellValue = String.valueOf(cell.getBooleanCellValue());
				break;
			case Cell.CELL_TYPE_FORMULA: // 公式
				cellValue = String.valueOf(cell.getCellFormula());
				break;
			case Cell.CELL_TYPE_BLANK: // 空值
				cellValue = "";
				break;
			case Cell.CELL_TYPE_ERROR: // 异常
				cellValue = "非法字符";
				break;
			default:
				cellValue = "未知类型";
				break;
			}
		} else {
			cellValue = "";
		}
		return cellValue;
	}

	/**
	 * 日期格式转换方法
	 * 
	 * @param cell   数据对象
	 * @return
	 */
	public static String stringDateProcess(Cell cell) {
		String result = new String();
		if (HSSFDateUtil.isCellDateFormatted(cell)) {// 处理日期格式、时间格式
			SimpleDateFormat sdf = null;
			if (cell.getCellStyle().getDataFormat() == HSSFDataFormat.getBuiltinFormat("h:mm")) {
				sdf = new SimpleDateFormat("HH:mm");
			} else {// 日期
				sdf = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");
			}
			Date date = cell.getDateCellValue();
			result = sdf.format(date);
		} else if (cell.getCellStyle().getDataFormat() == 58) {
			// 处理自定义日期格式：m月d日(通过判断单元格的格式id解决，id的值是58)
			SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");
			double value = cell.getNumericCellValue();
			Date date = org.apache.poi.ss.usermodel.DateUtil.getJavaDate(value);
			result = sdf.format(date);
		} else {
			double value = cell.getNumericCellValue();
			CellStyle style = cell.getCellStyle();
			DecimalFormat format = new DecimalFormat();
			String temp = style.getDataFormatString();
			// 单元格设置成常规
			if (temp.equals("General")) {
				format.applyPattern("#");
			}
			result = format.format(value);
		}

		return result;
	}

}

效果: