页面设置隐藏的iframe

页面下载按钮

id="btnDown" href="javascript:void(download('btnDown'))" >下载模板

页面JS脚本

function download(id){

$("#reqFrame").attr("src",encodeURI("/servlet/Common?action=downloadByPath&filePath="+$("#"+id).attr("title")));

}

后台servlet方法

public class SV_Common extends HttpServlet {

/**

*

*/

private static final long serialVersionUID = 1L;

public static final Logger logger = Logger.getLogger(SV_Common.class

.getName());

protected void service(HttpServletRequest request,

HttpServletResponse response) throws ServletException, IOException {

String action = request.getParameter("action");

try {

if ("downloadByPath".equals(action)) { //下载指定路径的文件

downloadByPath(request, response);

} else {

throw new IllegalArgumentException("没有相匹配的操作类型，请检查opp变量.");

}

} catch (Exception ex) {

ex.printStackTrace();

}

}

private void downloadByPath(HttpServletRequest request,

HttpServletResponse response) throws IOException, ServletException {

String filePath = request.getParameter("filePath");

logger.info("filePath="+filePath);

String fileFullName = filePath.substring(filePath.lastIndexOf("/") + 1);

response.reset();

if (request.getHeader("User-Agent").toLowerCase().indexOf("firefox") > 0) {

logger.info("User-Agent=firefox");

response.setHeader(

"Content-Disposition",

"attachment;filename=" + new String(fileFullName.getBytes("UTF-8"), "ISO8859-1")

);

} else {

logger.info("User-Agent=not firefox");

response.setHeader(

"Content-Disposition",

"attachment;filename=" + URLEncoder.encode(fileFullName, "UTF-8")

);

}

File file = new File(PathUtil.getPath("") + "/" + filePath);

response.setContentType(new MimetypesFileTypeMap().getContentType(file));

OutputStream out = response.getOutputStream();

BufferedInputStream in = null;

byte[] buffer = new byte[8192];

int length;

try

{

in = new BufferedInputStream(

new FileInputStream(file),8192

);

while ( (length = in.read(buffer)) != -1)

{

out.write(buffer, 0 ,length);

}

}

catch (IOException ex)

{

ex.printStackTrace();

}

finally

{

if (out != null)

{

try {out.close();}

catch (IOException ex) {}

out = null;

}

if (in != null)

{

try {in.close();}

catch (IOException ex) {}

in = null;

}

}

response.flushBuffer();

};

}

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