@RequestMapping(value = "/fileDownload")
@ResponseBody
public String fileDownload(HttpServletRequest request, HttpServletResponse response) throws IOException {
String msg = "";
// 用来检测程序运行时间
long startTime = System.currentTimeMillis();
String filename = "/home/xxx.zip";
File file = new File(filename);
byte[] data = getFileByteArray(filename);
Date date = new Date();
SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMddHHmmss");
String now = sdf.format(date);
try {
if (data == null) {
throw new FileNotFoundException("文件没有找到！");
}
String filename2 = "eclopppppp.zip";
response.setContentType("application/binary;charset=UTF-8");
response.setHeader("Content-Disposition", "attachment;fileName=" + URLEncoder.encode(filename2, "UTF-8"));
response.setContentLength(data.length);
response.getOutputStream().write(data);
response.getOutputStream().flush();
response.getOutputStream().close();
msg = "download success!!!";
} catch (FileNotFoundException e) {
e.printStackTrace();
msg = "download fail!!!";
}
long endTime = System.currentTimeMillis();
System.out.println("下载的运行时间：" + String.valueOf(endTime - startTime) + "ms");
return msg;
}
/**
* 写入本地磁盘
*
* @param filename
* @param data
*/
public void createNewFile(String filename, byte[] data) {
File file = new File(filename);
OutputStream output = null;
try {
if (!file.exists())
file.createNewFile();
output = new FileOutputStream(file);
IOUtils.write(data, output);
} catch (IOException e) {
e.printStackTrace();
} finally {
if (null != output) {
try {
output.close();
} catch (IOException e1) {
e1.printStackTrace();
}
output = null;
}
}
}
/**
* 下载文件
*
* @param filename
* @return
*/
public byte[] getFileByteArray(String filename) {
File file = new File(filename);
InputStream input = null;
byte[] data = null;
try {
if (!file.exists())
return null;
input = new FileInputStream(file);
data = IOUtils.toByteArray(input);
} catch (IOException e) {
e.printStackTrace();
} finally {
if (null != input) {
try {
input.close();
} catch (IOException e1) {
e1.printStackTrace();
}
input = null;
}
}
return data;
}