Java POI 读取Office Excel (2003,2007)及相关jar包 Spring Boot

poi-3.7-20101029.jar,下载地址:http://download.csdn.net/detail/evangel_z/4107089

geronimo-stax-api_1.0_spec-1.0.jar,下载地址:http://download.csdn.net/detail/evangel_z/4107083

xmlbeans-2.3.0.jar,下载地址:http://download.csdn.net/detail/evangel_z/4107140

poi-ooxml-3.7-20101029.jar,下载地址:http://download.csdn.net/detail/evangel_z/4107145

poi-ooxml-schemas-3.7-20101029.jar,下载地址:http://download.csdn.net/detail/evangel_z/4108997

以上5个jar,就可读取Excel 2003;

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读取Excel 2007,请加上dom4j-1.6.1.jar,下载地址:http://download.csdn.net/detail/evangel_z/6739735

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poi-3.6-20091214.jar,下载地址:http://download.csdn.net/detail/evangel_z/3895051

poi-contrib-3.6-20091214.jar,下载地址:http://download.csdn.net/detail/evangel_z/4107197

poi-scratch.6-20091214.jar,下载地址:http://download.csdn.net/detail/evangel_z/4107204

Java POI jar包专辑,下载地址:http://download.csdn.net/album/detail/3314

读取excel 文件的 java 代码:

public class ReadExcel {
     /**
     * 对外提供读取excel 的方法
     * */
public static List> readExcel(File file) throws IOException{
   String fileName = file.getName();
   String extension = fileName.lastIndexOf(".")==-1?"":fileName.substring(fileName.lastIndexOf(".")+1);
   if("xls".equals(extension)){
    return read2003Excel(file);
   }else if("xlsx".equals(extension)){
    return read2007Excel(file);
   }else{
    throw new IOException("不支持的文件类型");
   }
}
/**
* 读取 office 2003 excel
* @throws IOException 
* @throws FileNotFoundException */
private static List> read2003Excel(File file) throws IOException{
   List> list = new LinkedList>();
   HSSFWorkbook hwb = new HSSFWorkbook(new FileInputStream(file));
   HSSFSheet sheet = hwb.getSheetAt(0);
   Object value = null;
   HSSFRow row = null;
   HSSFCell cell = null; 
   for(int i = sheet.getFirstRowNum();i<= sheet.getPhysicalNumberOfRows();i++){
    row = sheet.getRow(i);
    if (row == null) {
     continue;
    }
    List linked = new LinkedList();
    for (int j = row.getFirstCellNum(); j <= row.getLastCellNum(); j++) {
     cell = row.getCell(j);
     if (cell == null) {
      continue;
     }
     DecimalFormat df = new DecimalFormat("0");// 格式化 number String 字符
     SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");// 格式化日期字符串
     DecimalFormat nf = new DecimalFormat("0.00");// 格式化数字
     switch (cell.getCellType()) {
     case XSSFCell.CELL_TYPE_STRING:
      System.out.println(i+"行"+j+" 列 is String type");
      value = cell.getStringCellValue();
      break;
     case XSSFCell.CELL_TYPE_NUMERIC:
      System.out.println(i+"行"+j+" 列 is Number type ; DateFormt:"+cell.getCellStyle().getDataFormatString());
      if("@".equals(cell.getCellStyle().getDataFormatString())){
         value = df.format(cell.getNumericCellValue());
      } else if("General".equals(cell.getCellStyle().getDataFormatString())){
         value = nf.format(cell.getNumericCellValue());
      }else{
        value = sdf.format(HSSFDateUtil.getJavaDate(cell.getNumericCellValue()));
      }
      break;
     case XSSFCell.CELL_TYPE_BOOLEAN:
      System.out.println(i+"行"+j+" 列 is Boolean type");
      value = cell.getBooleanCellValue();
      break;
     case XSSFCell.CELL_TYPE_BLANK:
      System.out.println(i+"行"+j+" 列 is Blank type");
      value = "";
      break;
     default:
      System.out.println(i+"行"+j+" 列 is default type");
      value = cell.toString();
     }
     if (value == null || "".equals(value)) {
      continue;
     }
     linked.add(value);  
   }
    list.add(linked);
   }
   return list;
}
/**
* 读取Office 2007 excel
* */
private static List> read2007Excel(File file) throws IOException {
   List> list = new LinkedList>();
   // 构造 XSSFWorkbook 对象,strPath 传入文件路径
   XSSFWorkbook xwb = new XSSFWorkbook(new FileInputStream(file));
   // 读取第一章表格内容
   XSSFSheet sheet = xwb.getSheetAt(0);
   Object value = null;
   XSSFRow row = null;
   XSSFCell cell = null;
   for (int i = sheet.getFirstRowNum(); i <= sheet
     .getPhysicalNumberOfRows(); i++) {
    row = sheet.getRow(i);
    if (row == null) {
     continue;
    }
    List linked = new LinkedList();
    for (int j = row.getFirstCellNum(); j <= row.getLastCellNum(); j++) {
     cell = row.getCell(j);
     if (cell == null) {
      continue;
     }
     DecimalFormat df = new DecimalFormat("0");// 格式化 number String 字符
     SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");// 格式化日期字符串
     DecimalFormat nf = new DecimalFormat("0.00");// 格式化数字
     switch (cell.getCellType()) {
     case XSSFCell.CELL_TYPE_STRING:
      System.out.println(i+"行"+j+" 列 is String type");
      value = cell.getStringCellValue();
      break;
     case XSSFCell.CELL_TYPE_NUMERIC:
      System.out.println(i+"行"+j+" 列 is Number type ; DateFormt:"+cell.getCellStyle().getDataFormatString());
      if("@".equals(cell.getCellStyle().getDataFormatString())){
        value = df.format(cell.getNumericCellValue());
      } else if("General".equals(cell.getCellStyle().getDataFormatString())){
        value = nf.format(cell.getNumericCellValue());
      }else{
       value = sdf.format(HSSFDateUtil.getJavaDate(cell.getNumericCellValue()));
      }
      break;
     case XSSFCell.CELL_TYPE_BOOLEAN:
      System.out.println(i+"行"+j+" 列 is Boolean type");
      value = cell.getBooleanCellValue();
      break;
     case XSSFCell.CELL_TYPE_BLANK:
      System.out.println(i+"行"+j+" 列 is Blank type");
      value = "";
      break;
     default:
      System.out.println(i+"行"+j+" 列 is default type");
      value = cell.toString();
     }
     if (value == null || "".equals(value)) {
      continue;
     }
     linked.add(value);
    }
    list.add(linked);
   }
   return list;
}
} 
  

说明:该类中共封装了三个方法,对外提供的读取excel文件的方法,两个私有的分别读取excel2003和excel2007的方法。外部使用,只需调用readExcel 方法,传入一个File 参数,程序根据文件扩展名来判断选取那个方法来读取Excel文件。

附:改进后代码

Q:excel的第1,2行有数据,第3,4行没数据,第5行有数据,第5行数据显示不出来。

A:sheet.getPhysicalNumberOfRows()获取有效的行数,多谢热心网友的指正,改进后代码如下:

public class ReadExcel {
	/**
	 * 对外提供读取excel 的方法
	 * */
	public static List> readExcel(File file) throws IOException {
		String fileName = file.getName();
		String extension = fileName.lastIndexOf(".") == -1 ? "" : fileName
				.substring(fileName.lastIndexOf(".") + 1);
		if ("xls".equals(extension)) {
			return read2003Excel(file);
		} else if ("xlsx".equals(extension)) {
			return read2007Excel(file);
		} else {
			throw new IOException("不支持的文件类型");
		}
	}
	/**
	 * 读取 office 2003 excel
	 * @throws IOException
	 * @throws FileNotFoundException
	 */
	private static List> read2003Excel(File file)
			throws IOException {
		List> list = new LinkedList>();
		HSSFWorkbook hwb = new HSSFWorkbook(new FileInputStream(file));
		HSSFSheet sheet = hwb.getSheetAt(0);
		Object value = null;
		HSSFRow row = null;
		HSSFCell cell = null;
		int counter = 0;
		for (int i = sheet.getFirstRowNum(); counter < sheet
				.getPhysicalNumberOfRows(); i++) {
			row = sheet.getRow(i);
			if (row == null) {
				continue;
			} else {
				counter++;
			}
			List linked = new LinkedList();
			for (int j = row.getFirstCellNum(); j <= row.getLastCellNum(); j++) {
				cell = row.getCell(j);
				if (cell == null) {
					continue;
				}
				DecimalFormat df = new DecimalFormat("0");// 格式化 number String 字符
				SimpleDateFormat sdf = new SimpleDateFormat(
						"yyyy-MM-dd HH:mm:ss");// 格式化日期字符串
				DecimalFormat nf = new DecimalFormat("0.00");// 格式化数字
				switch (cell.getCellType()) {
				case XSSFCell.CELL_TYPE_STRING:
					System.out.println(i + "行" + j + " 列 is String type");
					value = cell.getStringCellValue();
					break;
				case XSSFCell.CELL_TYPE_NUMERIC:
					System.out.println(i + "行" + j
							+ " 列 is Number type ; DateFormt:"
							+ cell.getCellStyle().getDataFormatString());
					if ("@".equals(cell.getCellStyle().getDataFormatString())) {
						value = df.format(cell.getNumericCellValue());
					} else if ("General".equals(cell.getCellStyle()
							.getDataFormatString())) {
						value = nf.format(cell.getNumericCellValue());
					} else {
						value = sdf.format(HSSFDateUtil.getJavaDate(cell
								.getNumericCellValue()));
					}
					break;
				case XSSFCell.CELL_TYPE_BOOLEAN:
					System.out.println(i + "行" + j + " 列 is Boolean type");
					value = cell.getBooleanCellValue();
					break;
				case XSSFCell.CELL_TYPE_BLANK:
					System.out.println(i + "行" + j + " 列 is Blank type");
					value = "";
					break;
				default:
					System.out.println(i + "行" + j + " 列 is default type");
					value = cell.toString();
				}
				if (value == null || "".equals(value)) {
					continue;
				}
				linked.add(value);
			}
			list.add(linked);
		}
		return list;
	}
	/**
	 * 读取Office 2007 excel
	 * */
	private static List> read2007Excel(File file)
			throws IOException {
		List> list = new LinkedList>();
		// 构造 XSSFWorkbook 对象,strPath 传入文件路径
		XSSFWorkbook xwb = new XSSFWorkbook(new FileInputStream(file));
		// 读取第一章表格内容
		XSSFSheet sheet = xwb.getSheetAt(0);
		Object value = null;
		XSSFRow row = null;
		XSSFCell cell = null;
		int counter = 0;
		for (int i = sheet.getFirstRowNum(); counter < sheet
				.getPhysicalNumberOfRows(); i++) {
			row = sheet.getRow(i);
			if (row == null) {
				continue;
			} else {
				counter++;
			}
			List linked = new LinkedList();
			for (int j = row.getFirstCellNum(); j <= row.getLastCellNum(); j++) {
				cell = row.getCell(j);
				if (cell == null) {
					continue;
				}
				DecimalFormat df = new DecimalFormat("0");// 格式化 number String 字符
				SimpleDateFormat sdf = new SimpleDateFormat(
						"yyyy-MM-dd HH:mm:ss");// 格式化日期字符串
				DecimalFormat nf = new DecimalFormat("0.00");// 格式化数字
				switch (cell.getCellType()) {
				case XSSFCell.CELL_TYPE_STRING:
					System.out.println(i + "行" + j + " 列 is String type");
					value = cell.getStringCellValue();
					break;
				case XSSFCell.CELL_TYPE_NUMERIC:
					System.out.println(i + "行" + j
							+ " 列 is Number type ; DateFormt:"
							+ cell.getCellStyle().getDataFormatString());
					if ("@".equals(cell.getCellStyle().getDataFormatString())) {
						value = df.format(cell.getNumericCellValue());
					} else if ("General".equals(cell.getCellStyle()
							.getDataFormatString())) {
						value = nf.format(cell.getNumericCellValue());
					} else {
						value = sdf.format(HSSFDateUtil.getJavaDate(cell
								.getNumericCellValue()));
					}
					break;
				case XSSFCell.CELL_TYPE_BOOLEAN:
					System.out.println(i + "行" + j + " 列 is Boolean type");
					value = cell.getBooleanCellValue();
					break;
				case XSSFCell.CELL_TYPE_BLANK:
					System.out.println(i + "行" + j + " 列 is Blank type");
					value = "";
					break;
				default:
					System.out.println(i + "行" + j + " 列 is default type");
					value = cell.toString();
				}
				if (value == null || "".equals(value)) {
					continue;
				}
				linked.add(value);
			}
			list.add(linked);
		}
		return list;
	}
	public static void main(String[] args) {
		try {
			readExcel(new File("D:\\test.xlsx"));
			// readExcel(new File("D:\\test.xls"));
		} catch (IOException e) {
			e.printStackTrace();
		}
	}
}
 
  

相关文章&源代码下载地址:

Java POI导出Excel经典实现 导出Excel弹出下载框 Spring Boot【不定期更新】

源代码下载地址:http://download.csdn.net/detail/evangel_z/7834173
最新代码下载地址:https://github.com/T5750/poi
相关说明:http://blog.csdn.net/evangel_z/article/details/7332535#t2

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