springmvc获取项目当前绝对路径，进行下载文件

<pre name="code" class="java">service层

@Autowiredprivate 

HttpServletRequest request;

String path = request.getServletContext().getRealPath("");//获取项目动态绝对路径

/*** 下载压缩文件* @param path request.getServletContext().getRealPath("")* @param zipName 压缩文件名称* @return* @throws Exception*/public ResponseEntity<byte[]> download(String path, String zipName) throws Exception {HttpHeaders headers = new HttpHeaders();String filePath = null;filePath = path + "/resources/excelzip/" + zipName + ".zip";headers.setContentType(MediaType.APPLICATION_OCTET_STREAM);headers.setContentDispositionFormData("attachment", new String("知识类别.zip".getBytes("UTF-8"), "iso-8859-1"));return (new ResponseEntity<byte[]>(FileUtils.readFileToByteArray(new File(filePath)), headers, HttpStatus.CREATED));}

页面点击

<a href="./downloadFile/download" >下载</a>

也可以在JS中执行了某操作之后，自动调用下载功能

<script type="text/javascript">  function xiazai(){$("#id").click();//jqury 点击方法}</script>