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public HttpServletResponse download(String path, HttpServletResponse response) {
try {
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File file = new File(path);
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String filename = file.getName();
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String ext = filename.substring(filename.lastIndexOf(".") + 1).toUpperCase();
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InputStream fis = new BufferedInputStream(new FileInputStream(path));
byte[] buffer = new byte[fis.available()];
fis.read(buffer);
fis.close();
// Çå¿Õresponse
response.reset();
// ÉèÖÃresponseµÄHeader
response.addHeader("Content-Disposition", "attachment;filename=" + new String(filename.getBytes()));
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