这里实现的下载程序包中指定路径的文件，我们将指定文件存放在resources的static文件夹下面。前台就是代码请求后台不要使用ajax请求，因为下载文件不支持ajax请求，可以使用window.location.href="#"或者是document.getElementById("downFrame").src=具体地址。看下后台代码。
之前遇到过问题是在idea下是可以成功下载的，但是部署在Linux环境下就不能够下载了。现在解决了这个问题。使其在Windows和Linux环境都可以用。大致代码如下：
public void test(HttpServletRequest request, HttpServletResponse response) throws Exception{String fileName = "c.zip";String filePath = "static" + File.separator + fileName;ClassPathResource re = new ClassPathResource(filePath);response.setContentType("application/vnd.ms-excel");response.setHeader("Content-Dispostion","filename="+new String(fileName.getBytes("GBK"),"ISO-8859-1"));response.setHeader("Pragma","No-cache");OutputStream os = response.getOutputStream();InputStream fis = re.getInputStream();try {byte[] data = new byte[1024];int size = du(fis, data);while (size != -1) {outWrite(os, data, 0, data.length);}os.flush();}catch(Exception e) {response.reset();e.printStackTrace();}finally {fis.close();os.close();response.flushBuffer();}}public static int du(InputStream in, byte buffer[]) {int readSize = 0;try {readSize = in.read(buffer);} catch (IOException e) {e.printStackTrace();}return readSize;
}public static void outWrite(OutputStream out, byte buffer[], int start, int readSize) {if (out != null && buffer.length > 0) {try {out.write(buffer, start, readSize);out.flush();} catch (IOException e) {e.printStackTrace();}}}