/**
* 文件下载
* @param url 下载路径
* @param request 解析对象
* @param response 响应对象
* @return
*/
@ResponseBody
@RequestMapping("/fileDownload")
public String fileDownload(@RequestParam("url")String url,HttpServletRequest request,HttpServletResponse response) {
System.out.println(url);
String message = "导入成功！";
String flag = "1";//0：失败，1：成功
String data = "";
InputStream inStream = null;
BufferedInputStream bfin = null;
BufferedOutputStream bfout = null;
try{
File file = new File(url);
if(!file.exists()){
throw new FileException() ;
}
int s = url.indexOf("_");
String sub = url.substring(s+1);
System.out.println(sub);
//1.设置文件ContentType类型，这样设置，会自动判断下载文件类型
response.setContentType("multipart/form-data");
//2.设置文件头：最后一个参数是设置下载文件名(假如我们叫a.pdf)
response.setHeader("Content-Disposition", "attachment;fileName="+URLEncoder.encode(sub, "UTF-8"));
inStream = new FileInputStream(url);//文件的存放路径
bfin = new BufferedInputStream(inStream);
bfout = new BufferedOutputStream(response.getOutputStream());
byte[] b = new byte[1024];
int len = 0;
while ((len = bfin.read(b)) > 0) {
bfout.write(b, 0, len);
}
bfout.flush();
} catch(FileException e){
System.out.println("文件下载失败！");
message = "文件已被删除或移除";
flag = "0";
data = "{flag:" + flag + ",message:\"" + message +"\"}";
} catch (Exception e) {
e.printStackTrace();
System.out.println("文件下载失败！");
message = "下载失败";
flag = "0";
data = "{flag:" + flag + ",message:\"" + message +"\"}";
}finally{
try {
inStream.close();
bfout.close();
bfin.close();
} catch (IOException e) {
e.printStackTrace();
}
}
return data;
}