jsp实现文件下载的代码

OutputStream out=response.getOutputStream();
			  byte by[]=new byte[500];
			  File fileLoad=new File(path);
			  response.reset();
			  response.setContentType("application/vnd.ms-excel");
			  response.setHeader("content-disposition","attachment; filename=text.xls");
			  long fileLength=fileLoad.length();
			  String length1=String.valueOf(fileLength);
			  response.setHeader("Content_Length",length1);
			  FileInputStream in=new FileInputStream(fileLoad);
			  int n;
			  while((n=in.read(by))!=-1){
			   out.write(by,0,n);
			  }
			  
			  in.close();
			  out.flush();

以上代码以下载excel为例，各种文件的下载大体相同只需改变相应的contentType即可。
其中response.setContentType()的String参数及对应类型为

<option   value="image/bmp">BMP</option>  
<option   value="image/gif">GIF</option>  
<option   value="image/jpeg">JPEG</option>  
<option   value="image/tiff">TIFF</option>  
<option   value="image/x-dcx">DCX</option>  
<option   value="image/x-pcx">PCX</option>  
<option   value="text/html">HTML</option>  
<option   value="text/plain">TXT</option>  
<option   value="text/xml">XML</option>  
<option   value="application/afp">AFP</option>  
<option   value="application/pdf">PDF</option>  
<option   value="application/rtf">RTF</option>  
<option   value="application/msword">MSWORD</option>  
<option   value="application/vnd.ms-excel">MSEXCEL</option>  
<option   value="application/vnd.ms-powerpoint">MSPOWERPOINT</option>  
<option   value="application/wordperfect5.1">WORDPERFECT</option>  
<option   value="application/vnd.lotus-wordpro">WORDPRO</option>  
<option   value="application/vnd.visio">VISIO</option>  
<option   value="application/vnd.framemaker">FRAMEMAKER</option>  
<option   value="application/vnd.lotus-1-2-3">LOTUS123</option>