GWT-如何读取服务器上的（文本）文件（或：如何在RemoteServiceServlet中获取ServletContext）

Question

For my GWT/GAE app I have a very large text file that I want to be read on the servlet in a normal way (eg Reader in = new InputStreamReader (VideoBroadcastServiceImpl.class.getResourceAsStream("com/myapp/resources/textfile") ) like you would do it on your local machine. The problem is that I get a NullPointerException in this line. I have read hints of a more complicated way to read a file that exists in the WEB-INF folder in a GWT project where I need the servletContext. Once I have the servletContext I can ask for the real path where the file exists. The problem of this way is that I need to implement the getServletContext() method by myself which is very easy in a HTTPServlet but not in a RemoteServiceServlet (the standard servlet of GWT for RPC calls which I also use). Is there another easy solution to read a file on the server or can you give me an advice how I can get the servletContext in a RemoteServiceServlet?

Thank you very much in advance!

Answer 1

A RemoteServiceServlet is an HttpServlet , so it has a getServletContext() method.

(you can also get the HttpServletRequest and HttpServletResponse with getThreadLocalRequest() and getThreadLocalResponse() respectively)