将StudentInfo.xlsx里的内容读取出来并封装到StudentInfo类的对象中

StudentInfo类的字段分别对应了excel中的列名，合成结果如下

利用反射可以很好地实现对任意类的数据封装。实现如下

public class Test {

	public <T> List<T> parseFromExcel(String path, Class<T> aimClass) {
		return parseFromExcel(path, 0, aimClass);
	}

	@SuppressWarnings("deprecation")
	public <T> List<T> parseFromExcel(String path, int firstIndex, Class<T> aimClass) {
		List<T> result = new ArrayList<T>();
		try {
			FileInputStream fis = new FileInputStream(path);
			Workbook workbook = WorkbookFactory.create(fis);
			Sheet sheet = workbook.getSheetAt(0);
			int lastRaw = sheet.getLastRowNum();
			for (int i = firstIndex; i < lastRaw; i++) {
				Row row = sheet.getRow(i);
				T parseObject = aimClass.newInstance();
				Field[] fields = aimClass.getDeclaredFields();
				for (int j = 0; j < fields.length; j++) {
					Field field = fields[j];
					field.setAccessible(true);
					Class<?> type = field.getType();
					Cell cell = row.getCell(j);
					if (cell == null)
						continue;
                    //很重要的一行代码,如果不加,像12345这样的数字是不会给你转成String的,只会给你转成double,而且会导致cell.getStringCellValue()报错
					cell.setCellType(Cell.CELL_TYPE_STRING);
					String cellContent = cell.getStringCellValue();
					cellContent = "".equals(cellContent) ? 0 + "" : cellContent;
					if (type.equals(String.class)) {
						field.set(parseObject, cellContent);
					} else if (type.equals(char.class) || type.equals(Character.class)) {
						field.set(parseObject, cellContent.charAt(0));
					} else if (type.equals(int.class) || type.equals(Integer.class)) {
						field.set(parseObject, Integer.parseInt(cellContent));
					} else if (type.equals(long.class) || type.equals(Long.class)) {
						field.set(parseObject, Long.parseLong(cellContent));
					} else if (type.equals(float.class) || type.equals(Float.class)) {
						field.set(parseObject, Float.parseFloat(cellContent));
					} else if (type.equals(double.class) || type.equals(Double.class)) {
						field.set(parseObject, Double.parseDouble(cellContent));
					} else if (type.equals(short.class) || type.equals(Short.class)) {
						field.set(parseObject, Short.parseShort(cellContent));
					} else if (type.equals(byte.class) || type.equals(Byte.class)) {
						field.set(parseObject, Byte.parseByte(cellContent));
					} else if (type.equals(boolean.class) || type.equals(Boolean.class)) {
						field.set(parseObject, Boolean.parseBoolean(cellContent));
					}
				}
				result.add(parseObject);
			}
			fis.close();
			return result;
		} catch (

		Exception e) {
			e.printStackTrace();
			System.err.println("An error occured when parsing object from Excel. at " + this.getClass());
		}
		return result;
	}


	public static void main(String[] args) throws Exception {
         //参数里的5表示有效行数从第5行开始
		 List<StudentInfo> studentInfos = new
		 Test().parseFromExcel("C:\\Users\\unive\\Desktop\\StudentInfo.xlsx", 5,
		 StudentInfo.class);
		 for (int i = 0; i < studentInfos.size(); i++) {
		 System.err.println(studentInfos.get(i).toString());
		 }
	}

}

引用的jar包是Apache POI，版本3.17.x，更新于2017年9月，使用的人数是近年来最多的，Maven坐标如下

<!-- https://mvnrepository.com/artifact/org.apache.poi/poi-ooxml -->
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi-ooxml</artifactId>
            <version>3.17</version>
        </dependency>
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi</artifactId>
            <version>3.17</version>
        </dependency>