Java读取Excel文件（包括xls和xlsx）的样例程序

样例程序如下所示，其中：

• parseXls()函数依赖于jxl，只能读取xls格式文件；
• parseExcel()函数依赖于apache poi，能够读取xls和xlsx两种格式的文件。
  
  jxl的依赖：

		<!-- https://mvnrepository.com/artifact/net.sourceforge.jexcelapi/jxl -->
		<dependency>
			<groupId>net.sourceforge.jexcelapi</groupId>
			<artifactId>jxl</artifactId>
			<version>2.6.12</version>
		</dependency>

apache poi的依赖：

		<dependency>
			<groupId>org.apache.poi</groupId>
			<artifactId>poi</artifactId>
			<version>3.10-FINAL</version>
		</dependency>
		<dependency>
			<groupId>org.apache.poi</groupId>
			<artifactId>poi-ooxml</artifactId>
			<version>3.10-FINAL</version>
		</dependency>

示例代码：

import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

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.xssf.usermodel.XSSFWorkbook;

import jxl.Sheet;
import jxl.Workbook;

public class ExcelParser {

	public List<List<String>> parseXls(File file) {
		try {
			Workbook workbook = Workbook.getWorkbook(file);
			Sheet sheet = workbook.getSheet(0);
			List<List<String>> list = new ArrayList<List<String>>();
			for (int i = 0; i < sheet.getRows(); i++) {
				List<String> rowList = new ArrayList<String>();
				for (int j = 0; j < sheet.getColumns(); j++) {
					rowList.add(sheet.getCell(j, i).getContents());
				}
				list.add(rowList);
			}
			// test
			for (List<String> rowList : list) {
				for (String s : rowList)
					System.out.print(s + ",");
				System.out.println();
			}

			return list;
		} catch (Exception e) {
			e.printStackTrace();
			return null;
		}
	}

	public List<List<String>> parseExcel(File file) {
		try {
			InputStream fis = new FileInputStream(file);
			String fileName = file.getName();
			org.apache.poi.ss.usermodel.Workbook workbook = null;
			if (fileName.toLowerCase().endsWith("xlsx")) {
				workbook = new XSSFWorkbook(fis);
			} else if (fileName.toLowerCase().endsWith("xls")) {
				workbook = new HSSFWorkbook(fis);
			}
			org.apache.poi.ss.usermodel.Sheet sheet = workbook.getSheetAt(0);
			List<List<String>> list = new ArrayList<List<String>>();
			Iterator<Row> rowIterator = sheet.iterator();
			while (rowIterator.hasNext()) {
				Row row = rowIterator.next();
				List<String> rowList = new ArrayList<String>();
				Iterator<Cell> cellIterator = row.cellIterator();
				while (cellIterator.hasNext()) {
					Cell cell = cellIterator.next();
					switch(cell.getCellType()) {
					case Cell.CELL_TYPE_NUMERIC:
						rowList.add("" + cell.getNumericCellValue());
						break;
					case Cell.CELL_TYPE_STRING:
					default:
						rowList.add(cell.getStringCellValue());
						break;
					}
				}
				list.add(rowList);
			}
			// test
			for (List<String> rowList : list) {
				for (String s : rowList)
					System.out.print(s + ",");
				System.out.println();
			}
			return list;
		} catch (Exception e) {
			e.printStackTrace();
			return null;
		}

	}

	public static void main(String[] args) {
		new ExcelParser().parseExcel(new File("C:\\Users\\zifeiy\\Documents\\zifeiy.xlsx"));
	}

}

参考链接：https://www.journaldev.com/2562/apache-poi-tutorial