response.setContentType()的String参数及对应类型

<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>

附件下载的话，需要做如下设置：

response.setContentType("application/octet-stream");

response.setHeader("Content-disposition", "attachment;filename=" + fileName)；

response.setHeader("content-disposition", "attachment;filename="+URLEncoder.encode(file.getName(),"utf-8"));