如何使用@Scheduled（cron =「0 0/1 * * * *」）自動在Spring MVC中生成xls報告

Question

您好我正在嘗試使用@Scheduled自動生成xls報告（cron =「0 0/1 * * * *「）在特定的時間，但它不能正常工作，請您及時誰給你Idea.Thank

Answer 1

嗨根據與你正在嘗試做的，我會用這種方法：

1. 使用cron每天生成報告文件並將其存儲在某個特定位置
2. 創建網址以便讀取任何報告按dd/MM/yyyy

因此從技術上講是這樣的：

@Scheduled(cron = "0 0/1 * * * *") 
public void freezeDateTwo(){ 
    System.out.println("shudler Working"); 
    service.updateFreezeOnDateTwoAndSixteen(); 
    List<ExtusrRole> user = service.getExtUser(); 
    excelReport(user); 
    //In this point you should have created a report in some specific location 
} 

在你的控制器

@RequestMapping(value = "/reports/{dd}/{mm}/{yyyy}", method = RequestMethod.GET) 
@ResponseBody 
private void excelReport(@PathVariable("dd") Integer day, 
         @PathVariable("mm") Integer month, 
         @PathVariable("yyyy") Integer year, 
         HttpServletResponse response) { 
    System.out.println("excelReport"); 
    //Search from your specific location the right report 
    File file = //Your file 
    String mimeType = URLConnection.guessContentTypeFromName(file.getName()); 
    response.setContentType(mimeType); 
    response.setHeader("Content-Disposition", String.format("attachment; filename=\"%s\"", file.getName())); 
    response.setContentLength((int) file.length()); 
    InputStream inputStream = new BufferedInputStream(new FileInputStream(file)); 
    FileCopyUtils.copy(inputStream, response.getOutputStream()); 
}