java定时器任务重获取HttpServletRequest对象不成功

我就是我 2022-09-09 06:24 35阅读 0赞

**项目中在做一个定时任务，发送邮件的过程中，使用request获取文件模板路径的过程中，发现request获取失败，由于在测试时候是前端触发的，所以在获取request时候，并未发现异常，当触发自动跑批时候，发现request获取失败**

1.在尝试使用**静态获取**和使用[直接注入HttpServletRequest][HttpServletRequest]的办法，都没有解决问题，会抛出如下异常：

ERROR [org.springframework.scheduling.support.TaskUtils$LoggingErrorHandler] 
     - Unexpected error occurred in scheduled task.

2、使用@Autowired注入HttpServletRequest，会抛出如下异常：

ava.lang.IllegalStateException: No thread-bound request found: Are you referring to request attributes outside of an actual web request, or processing a request outside of the originally receiving thread? If you are actually operating within a web request and still receive this message, your code is probably running outside of DispatcherServlet/DispatcherPortlet: In this case, use RequestContextListener or RequestContextFilter to expose the current request.
    	at org.springframework.web.context.request.RequestContextHolder.currentRequestAttributes(RequestContextHolder.java:131)
    	at org.springframework.web.context.support.WebApplicationContextUtils.currentRequestAttributes(WebApplicationContextUtils.java:273)

**问题解决：**  
通过ContextLoader获取getCurrentWebApplicationContext方法解决

WebApplicationContext webApplicationContext = ContextLoader.getCurrentWebApplicationContext();
     ServletContext servletContext = webApplicationContext.getServletContext();
     String realPath = servletContext.getRealPath(File.separator);

[HttpServletRequest]: https://jingyan.baidu.com/article/a24b33cd487e9f58fe002bb5.html