读取excel文件，支持doc ，docx格式 附带上传方法

没有用任何现有框架，以后遇见的在写用框架的吧

首先需要的jar包：poi-3.8-beta2-20110408.jar

             poi-examples-3.8-beta2-20110408.jar
             poi-excelant-3.8-beta2-20110408.jar
             poi-ooxml-3.8-beta2-20110408.jar
             poi-ooxml-schemas-3.8-beta2-20110408.jar
             xmlbeans-2.3.0.jar

             openxml4j-1.0-beta.jar

java 代码：

         /* 
	 * Java文件操作 获取文件扩展名 
	 * 
	 *  Created on: 2011-8-2 
	 *      Author: blueeagle 
	 */  
	    public static String getExtensionName(String filename) {   
	        if ((filename != null) && (filename.length() > 0)) {   
	            int dot = filename.lastIndexOf('.');   
	            if ((dot >-1) && (dot < (filename.length() - 1))) {   
	                return filename.substring(dot + 1);   
	            }   
	        }   
	        return filename;   
	    }
	    /* 
		 * Java读取excel 97-2010及以上 
		 * 
		 *  Created on: 2011-8-2 
		 *      Author: blueeagle 
		 */ 
	    public String readExcel(File file) throws IOException{
	    	setSavePath("tmp");
			String filePath = ServletActionContext.getServletContext().getRealPath(
					this.getSavePath())
					+ "\\" + getUploadFileName();
	    	File filepath = new File(filePath);
			copy(file, filepath); 
			String ExtensionName= getExtensionName(filePath);
			System.out.println("后缀名："+ExtensionName);
			String value =null;
			if(ExtensionName.equals("xls")){
				try {
                    System.out.println("2003");
					// 创建对Excel工作簿文件的引用
					HSSFWorkbook wookbook = new HSSFWorkbook(new FileInputStream(
							filePath));
					// 在Excel文档中，第一张工作表的缺省索引是0
					// 其语句为：HSSFSheet sheet = workbook.getSheetAt(0);
					HSSFSheet sheet = wookbook.getSheet("Sheet1");
					// 获取到Excel文件中的所有行数-
					int rows = sheet.getPhysicalNumberOfRows();
					// 遍历行-
					for (int i = 0; i < rows; i++) {
						// 读取左上端单元格
						HSSFRow row = sheet.getRow(i + 1);
						// 行不为空
						if (row != null) {
							// 获取到Excel文件中的所有的列
							int cells = row.getPhysicalNumberOfCells();
							
							// 遍历列
							for (int j = 0; j < cells; j++) {
								// 获取到列的值-
								try {
									HSSFCell cell = row.getCell(j);
									if (cell != null) {
										switch (cell.getCellType()) {
										case HSSFCell.CELL_TYPE_FORMULA:
											break;
										case HSSFCell.CELL_TYPE_NUMERIC:
											value += cell.getNumericCellValue() + "~";
											break;
										case HSSFCell.CELL_TYPE_STRING:
											value += cell.getStringCellValue() + "~";
											break;
										default:
											value += "0";
											break;
										}
									}
								} catch (Exception e) {
									
								}
							}
						}
					}
				} catch (IOException e) {
					e.printStackTrace();
				}
			}else if(ExtensionName.equals("xlsx")) {
				System.out.println("2007");
				// 构造 XSSFWorkbook 对象，strPath 传入文件路径  
				XSSFWorkbook xwb = new XSSFWorkbook(filePath);  
				// 读取第一章表格内容  
				System.out.println("没有读取第一个表格：");
				XSSFSheet sheet = xwb.getSheetAt(0);
				System.out.println("读取了第一个表格：");
				// 定义 row、cell  
				XSSFRow row; 
				
				// 循环输出表格中的内容  
				for (int i = sheet.getFirstRowNum(); i < sheet.getPhysicalNumberOfRows(); i++) {
					
				    row = sheet.getRow(i+1);
				    if(row !=null){
				    	 for (int j = row.getFirstCellNum(); j < row.getPhysicalNumberOfCells(); j++) {  
						        // 通过 row.getCell(j).toString() 获取单元格内容， 
						    	if(!row.getCell(j).toString().isEmpty()){
						    		value += row.getCell(j).toString()+"~";  
						    	}
						         
						    }  	
				    }
				   
				   
				} 		
			}else{
				String string="文件类型错误，不是Excel文件！";
				addActionMessage(string);
			    String errorString="error!";
				ServletActionContext.getRequest().setAttribute("ss", errorString);	
			}
			filepath.delete();
			System.out.println("value：的值"+value);
			return value;
	 			
	    }
	    	  
	 // -----------上传文件,工具方法---------
		private static final int BUFFER_SIZE = 10 * 1024;

		/**
		 * 
		 * @param src
		 *            源文件
		 * @param dst
		 *            目标位置
		 */
		private static void copy(File src, File dst) {
			InputStream in = null;
			OutputStream out = null;
			try {
				in = new BufferedInputStream(new FileInputStream(src), BUFFER_SIZE);
				out = new BufferedOutputStream(new FileOutputStream(dst),
						BUFFER_SIZE);
				byte[] buffer = new byte[BUFFER_SIZE];
				int len = 0;
				while ((len = in.read(buffer)) > 0) {
					out.write(buffer, 0, len);
				}
			} catch (Exception e) {
				e.printStackTrace();
			} finally {
				if (null != in) {
					try {
						in.close();
					} catch (IOException e) {
						e.printStackTrace();
					}
				}
				if (null != out) {
					try {
						out.close();
					} catch (IOException e) {
						e.printStackTrace();
					}
				}
			}
		}