用poi全文读取的简单方法

一个简单的全部读取excel内容的方法，基本思路是全部非空单元格读取后拼接起来

public static String readExcel(String path){
		StringBuffer content = new StringBuffer("");// 文档内容
		
		try {
			FileInputStream is = new FileInputStream(new File(path));
			HSSFWorkbook wb = new HSSFWorkbook(is);
			
			int sheetNumbers = wb.getNumberOfSheets();
			for(int i=0;i<sheetNumbers;i++){
				HSSFSheet sheet = wb.getSheetAt(i);
				
				int rows = sheet.getLastRowNum();
				for(int j=0;j<=rows;j++){
					
					HSSFRow row = sheet.getRow(j);
					
					if(null!=row){
						int cells = row.getLastCellNum();
						
						for(int k=0;k<=cells;k++){
							HSSFCell cell = row.getCell(k);
							if(cell!=null)
								content.append(cell.toString());
						}
					}
				}
			}
		} catch (FileNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		return content.toString().trim();
	}