java - Freemarker getServletContext().getMimeType(文件名)

Question

我正在尝试在 Freemarker\Spark 中获取 servlet 上下文，而我的 getServletContext() 返回给我 null。

ServletContext servletContext = request.raw().getSession().getServletContext();
File titleImage = (File)post.get("titleimage");

resp.setHeader("Content-Type", servletContext.getMimeType(titleImage.getName()));   
resp.setHeader("Content-Length", String.valueOf(titleImage.length()));   
resp.setHeader("Content-Disposition", "inline; filename=\""+titleImage.getName()+"\""); 

Answer 1

代替

ServletContext servletContext = request.raw().getSession().getServletContext();

这样做:

ServletContext context = request.getSession().getServletContext();