JavaWeb文件下载功能实例代码

JavaWeb文件下载功能实例代码

在工作中遇到的一个下载文件的功能，自己将其抽取出来，代码简单，希望能帮到大家，好了，话不多说，上代码！

public void downloadFile(File file, String downName, HttpServletRequest request, HttpServletResponse response) {

OutputStream out = null;

FileInputStream fin = null;

BufferedInputStream bin = null;

try {

if (file.exists()) {

String finalFileName = null;

String agent = request.getHeader("User-Agent");

boolean isMSIE = (agent != null && agent.indexOf("MSIE") != -1);

if (isMSIE) {

finalFileName = URLEncoder.encode(downName, "UTF8");

} else {

finalFileName = new String(downName.getBytes("UTF-8"), "ISO-8859-1");

}

response.setContentType("application/x-msdownload");

response.setHeader("Content-Disposition", "attachment; filename=".concat(finalFileName));

out = response.getOutputStream();

fin = new FileInputStream(file);

bin = new BufferedInputStream(fin);

for (int data = bin.read(); data > http://-1; data = bin.read()) {

out.write(data);

}

} else {

}

} catch (Exception e) {

e.printStackTrace();

} finally {

try {

if (bin != null)

bin.close();

if (fin != null)

fin.close();

if (out != null)

out.close();

} catch (Exception e2) {

e2.printStackTrace();

}

}

}

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