java从服务器下载xls文件到客户端

本是古典何须时尚 2024-02-17 20:13 4阅读 0赞

查考网上的代码写了一个下载xls文件到客户端的jsp页面，只要将服务器的文件地址传给这个jsp页面就可以实现下载文件到客户端了。

Code:

1.  <%@ page language="java" import="java.util.\*" pageEncoding="utf-8"%>
2.  <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
3.  <%@ page import="java.io.\*" %>
4.  <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
5.  <html xmlns="http://www.w3.org/1999/xhtml">
6.  <head>
7.  <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
8.  <link href="styles/basic.css" rel="stylesheet" type="text/css" />
9.  <title>download</title>
10. </head>
11. <%
12. response.setCharacterEncoding("gb2312");
13. request.setCharacterEncoding("gb2312");
14. 
15. if (request.getParameter("file") != null) \{
16. OutputStream os = null;
17. FileInputStream fis = null;
18. try \{
19. String file = request.getParameter("file");
20. if (!(new File(file)).exists()) \{
21. System.out.println("没有文件");
22. return;
23. \}
24. System.out.println("文件名为："+file);
25. os = response.getOutputStream();
26. response.setHeader("content-disposition", "attachment;filename=" + file);
27. response.setContentType("application/vnd.ms-excel");//此项内容随文件类型而异
28. byte temp\[\] = new byte\[1000\];
29. fis = new FileInputStream(file);
30. int n = 0;
31. while ((n = fis.read(temp)) != -1) \{
32. os.write(temp, 0, n);
33. \}
34. \} catch (Exception e) \{
35. out.print("出错");
36. \} finally \{
37. if (os != null)
38. os.close();
39. if (fis != null)
40. fis.close();
41. \}
42. out.clear();
43. out = pageContext.pushBody();
44. 
45. \}
46. %>
47. 
48. <form action="" method="post">
49. <select name="file">
50. <option value="D://test//test.xls">
51. 冷山sky\_snow
52. </option>
53. </select>
54. <input type="submit"/>
55. </form>
56. </html>