jsp从服务器下载xls文件到客户端

参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。

Html代码

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");
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();
45. }
46. %>
48. <form action="" method="post">
49. <select name="file">
50. <option value="D:\Program Files\apache-tomcat-6.0.18\webapps\StarAttendance\upload/temp.xls">
51. 冷山sky_snow
52. </option>
53. </select>
54. <input type="submit"/>
55. </form>
56. </html>

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<%@ page import="java.io.*" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
		<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
		<link href="styles/basic.css" rel="stylesheet" type="text/css" />
		<title>download</title>
</head>
<%    
     response.setCharacterEncoding("gb2312");    
     request.setCharacterEncoding("gb2312");    
   
    if (request.getParameter("file") != null) {    
         OutputStream os = null;    
         FileInputStream fis = null;    
        try {    
             String file = request.getParameter("file");    
            if (!(new File(file)).exists()) {    
                 System.out.println("没有文件");    
                return;    
             }    
             System.out.println("文件名为："+file);    
             os = response.getOutputStream();    
             response.setHeader("content-disposition", "attachment;filename=" + file);    
             response.setContentType("application/vnd.ms-excel");//此项内容随文件类型而异    
            byte temp[] = new byte[1000];    
             fis = new FileInputStream(file);    
            int n = 0;    
            while ((n = fis.read(temp)) != -1) {    
                 os.write(temp, 0, n);    
             }    
         } catch (Exception e) {    
             out.print("出错");    
         } finally {    
            if (os != null)    
                 os.close();    
            if (fis != null)    
                 fis.close();    
         }    
         out.clear();    
         out = pageContext.pushBody();    
   
     }    
%>    
   
<form action="" method="post">    
     <select name="file">    
         <option value="D:\Program Files\apache-tomcat-6.0.18\webapps\StarAttendance\upload/temp.xls">    
             冷山sky_snow    
         </option>    
     </select>    
     <input type="submit"/>    
</form> 
</html>

2.另外一个修改后的版本（下载文件名可包含中文）

Html代码

1. <%@ page language="java"import="java.util.*,java.net.*"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. <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
7. <html xmlns="http://www.w3.org/1999/xhtml">
8. <head>
9. <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
10. <link href="styles/basic.css" rel="stylesheet" type="text/css" />
11. <title>download</title>
12. </head>
13. <%
14. response.setCharacterEncoding("UTF-8");
15. request.setCharacterEncoding("UTF-8");
17. String filepath = new String(request.getParameter("file").getBytes("ISO-8859-1"),"UTF-8");
18. System.out.println("============================"+filepath);
19. if (filepath != null) {
20. OutputStream os = null;
21. FileInputStream fis = null;
22. try {
23. String file = filepath;
24. if (!(new File(file)).exists()) {
25. System.out.println("没有文件");
26. return;
27. }
28. String filefilename = file.substring(file.lastIndexOf("\\")+1);
29. System.out.println("文件名为："+filename);
30. os = response.getOutputStream();
31. response.setHeader("content-disposition", "attachment;filename=" + new String(filename.getBytes("GBK"), "ISO-8859-1"));
32. response.setContentType("application/octet-stream");//八进制流 与文件类型无关
33. byte temp[] = new byte[1024];
34. fis = new FileInputStream(file);
35. int n = 0;
36. while ((n = fis.read(temp)) != -1) {
37. os.write(temp, 0, n);
38. }
39. } catch (Exception e) {
40. out.print("出错了");
41. } finally {
42. if (os != null)
43. os.close();
44. if (fis != null)
45. fis.close();
46. }
47. out.clear();
48. out = pageContext.pushBody();
50. }
51. %>
52. </html>