| key words: jsp文件下载 中文乱码 文件名乱码
文件上传参看: 这里
碰到文件乱码，google了一下，发现这篇文章还不赖
摘录如下:
之前,写过一个Download.jsp文件,可以解决下载文件乱码问题(诸如:DOC,XSL文件等等).
后来发现,遇到中文名的文件的时候,文件下载将会报错~~~~
今天,通过改写原Download.jsp文件已经彻底解决了这个问题~
现在,把一整套的文件上传下载的方法给贴出来~~~以便大家借鉴!~!~!~!~!?
作者:古埃及法老
download.jsp文件
---------------------------------------------------------
<%
??java.io.BufferedInputStream?bis=null;
??java.io.BufferedOutputStream??bos=null;
try{
?String?filename=request.getParameter("filename");
?????????????filename=new?String(filename.getBytes("iso8859-1"),"gb2312");
?response.setContentType("application/x-msdownload");
?response.setHeader("Content-disposition","attachment;?filename="+new?String(filename.getBytes("gb2312"),"iso8859-1"));
?bis?=new?java.io.BufferedInputStream(new?java.io.FileInputStream(config.getServletContext().getRealPath("files/"?+?filename)));
?bos=new?java.io.BufferedOutputStream(response.getOutputStream());?
?byte[]?buff?=?new?byte[2048];
?int?bytesRead;
?while(-1?!=?(bytesRead?=?bis.read(buff,?0,?buff.length)))?{
??bos.write(buff,0,bytesRead);
?}
}
catch(Exception?e){
?e.printStackTrace();
}
finally?{
?if?(bis?!=?null)bis.close();
?if?(bos?!=?null)bos.close();
}
%>?
注意，关键就是setHeader里的filename需要重新编码,格式是ISO-8859-1就ＯＫ了
以下是我自己项目中用到的代码片断，供参考:
list.jsp: 显示附件名称的页面
<tr>
????????????<td?height="25"?class="tdcor">附 件 </td>
????????????<td?colspan="3"?height=50>
????????????????<%
????????????????????if?(null?!=?publish.getAttatchFilename()?&&
publish.getAttatchFilename().length()?>?0)?{
????????????????%>
????????????????<a?href="publish_do.jsp?method=download&fileName=
<%=URLEncoder.encode(publish.getAttatchFilename(),"GBK")%>">
<%=URLDecoder.decode(publish.getAttatchFilename(),"GBK")%></a>
????????????????<%
????????????????????}
????????????????%>
????????????</td>
</tr>
download.jsp:下载页面else?if?(null?!=?method?&&?method.equals("download"))?{//下载附件
????????String?fileName?=?request.getParameter("fileName");
????????File?file?=?new?File(Constants.PUBLISH_FILE_PATH?+?"/"?+?URLDecoder.decode(fileName,"GBK"));
????????response.reset();
????????response.setContentType("application/octet-stream;?charset=GBK");
????????response.addHeader("Content-Disposition",?"attachment;?filename="?+?CourseDetailBusiness.transfer(URLDecoder.decode(fileName,"GBK"),"GBK","ISO-8859-1"));
????????response.setContentLength((int)?file.length());
????????byte[]?buffer?=?new?byte[4096];
????????BufferedOutputStream?output?=?null;
????????BufferedInputStream?input?=?null;
????????//?写缓冲区：
????????try?{
????????????output?=?new?BufferedOutputStream(response.getOutputStream());
????????????input?=?new?BufferedInputStream(new?FileInputStream(file));
????????????int?n?=?(-1);
????????????while?((n?=?input.read(buffer,?0,?4096))?>?-1)?{
????????????????output.write(buffer,?0,?n);
????????????}
????????????response.flushBuffer();
????????}
????????catch?(Exception?e)?{
????????}?//?maybe?user?cancelled?download
????????finally?{
????????????if?(input?!=?null)?input.close();
????????????if?(output?!=?null)?output.close();
????????}
说明:
１。文件名在数据库中保存的编码为URLEncode
2.在list.jsp显示的时候多了一次encode,不知为什么，不encode一次还不行，实际上是第二次编码了
Alex 2006-06-14 22:48
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