JXL 导入excel到数据库

时间 2019-11-17 标签 jxl 导入 excel 数据库

1.所需jar javascript

commons-fileupload-x.x.x.jar html

commons-io-x.x.x.jar java

jxl.jar jquery

2.思路 ajax

a).jsp页面，用于上传Excel文件数据库

b).后台读取Excel文件 json

c).保存到数据库缓存

3.代码实现 app

a).jsp页面 jsp

jquery.form.js

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>jxl导入Excel文件</title>

<script type="text/javascript"
	src="<c:url value="/js/jquery-1.7.2.min.js"/>"></script>
<script type="text/javascript" src="<c:url value="/js/jquery.form.js"/>"></script>
<script type="text/javascript">
	$(document).ready(function() {
		$('#btnBatch').click(function(){
      	   //检验导入的文件是否为Excel文件  
      	    var file = document.getElementById("file").value;  
      	    if(file == null || file == ''){  
      	    	  alert('请选择要上传的Excel文件');  
      	        return;  
      	    }else{  
      	        var fileExtend = file.substring(file.lastIndexOf('.')).toLowerCase();   
      	        if(fileExtend == '.xls'){  
      	        	$('#excelForm').ajaxSubmit({
      	        		dataType:'json',
                      	success: function(data) {
                             if(data.flag == 'success') {
                            	 alert('导入成功');
                             }
                          }
                      });
      	        }else{  
      	           alert('文件格式需为\'.xls\'格式');  
      	           return;  
      	        }  
      	    }  
         });
	});
</script>

</head>

<body>
	<form id="excelForm" encType="multipart/form-data" method="post"
		action="<c:url value="/excel/excelBatch.do"/>">
		<input type="file" id="file" name="file" /> 
		<input type="button" id="btnBatch" value="导入">
	</form>
</body>
</html>

b.)后台处理

Excel格式：

/**
	 * 读取处理Excel
	 * */
	@RequestMapping(value = "/excelBatch.do")
	public void excelBatch(@RequestParam("file") MultipartFile file,
			HttpServletResponse response, HttpServletRequest request)
			throws Exception {
		ByteArrayInputStream is = null;
		try {
			//读取流文件
			is = new ByteArrayInputStream(file.getBytes());
			// 打开文件
			Workbook book = Workbook.getWorkbook(is);
			// 获得第一个工做表对象
			Sheet sheet = book.getSheet(0);
			// 获得第一个工做表中的总行数
			int rowCount = sheet.getRows();
			Map<String, String> map = new HashMap<String, String>();
			if (rowCount > 1) {
				// 循环取出Excel中的内容
				for (int i = 1; i < rowCount; i++) {
					Cell[] cells = sheet.getRow(i);
					String col1 = cells[0].getContents();//数据1
					String col2 = cells[1].getContents();//数据2
					String col3 = cells[2].getContents();//数据3
					// 保存到数据库...
				}
				map.put("flag", "success");
				writerJson(response, map);
			}
		} catch (BiffException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		} finally {
			is.close();
		}
	}

	public static void writerJson(HttpServletResponse response, String jsonStr) {
		writer(response, jsonStr);
	}

	public static void writerJson(HttpServletResponse response, Object object) {
		try {
			response.setContentType("application/json");
			writer(response, JSONUtil.toJSONString(object));
		} catch (JSONException e) {
			e.printStackTrace();
		}
	}

	private static void writer(HttpServletResponse response, String str) {
		try {
			StringBuffer result = new StringBuffer();
			// 设置页面不缓存
			response.setHeader("Pragma", "No-cache");
			response.setHeader("Cache-Control", "no-cache");
			response.setCharacterEncoding("UTF-8");
			response.setContentType("text/html");
			PrintWriter out = null;
			out = response.getWriter();
			out.print(str);
			out.flush();
			out.close();
		} catch (IOException e) {
			e.printStackTrace();
		}
	}