1.頁面程式碼

<a class="layui-btn" href="${pageContext.request.contextPath}/bAndWListManage/downloadWhiteListTmp.do" onclick="downloadTemplate();">模板下載</a>

2.後臺程式碼

@RequestMapping("downloadWhiteListTmp")  
    public ResponseEntity<byte[]> downloadWhiteListTmp(HttpServletRequest request) {  
    	
        HttpHeaders headers = new HttpHeaders();
        String fileName="importVehicleWhitelist.xls";
        ServletContext servletContext = request.getServletContext();
        String realPath = servletContext.getRealPath("/bwlmm/templateFiles/"+fileName); 
        File file = new File(realPath);
        InputStream in;
        byte[] body=null;
        ResponseEntity<byte[]> response =null;
		try {
			in = new FileInputStream(new File(realPath));
		        body=new byte[in.available()];// 返回下一次對此輸入流呼叫的方法可以不受阻塞地從此輸入流讀取（或跳過）的估計剩餘位元組數
		        in.read(body);//讀入到輸入流裡面
		       fileName=new String(fileName.getBytes("gbk"),"iso8859-1");//防止中文亂碼
		       headers.add("Content-Disposition", "attachment;filename="+fileName);
		       HttpStatus statusCode = HttpStatus.OK;//設定響應嗎
		       response =new ResponseEntity<byte[]>(body, headers, statusCode);
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		}//將該檔案加入到輸入流之中
		catch (IOException e) {
			e.printStackTrace();
		}
       return response;
    }
 

3.說明

我的檔案路徑