What does the path get from the server by getRealPath () in jsp

问题

I am using struts 1.3,jsp for developing application. I want to know what following code will return path from the server.

 path = getServlet().getServletContext().getRealPath("/") +"images\\logos\\"+ formFile.getFileName();

What will be the path from the server.Can i use this path for showing image on the page.

回答1:

First of all: getRealPath is deprecated. (compare: Interface ServletRequest). You should try this instead (since spec 2.1):

ServletContext context = session.getServletContext();
String realContextPath = context.getRealPath(request.getContextPath());

Earlier to this, it was highly depended on the server implementation. According to the spec it was allowed to return null if the application was deployed as a archived module (war, ear, etc.) I believe this never happened e.g. with WebLogic. It returned the path to the temp directory where the archives had been unpacked. So, to make a long answer short:

Your code will end up with something like this:

x:\your\path\on\drive\images\logos\somename.ext

It's not possible to use this as an image URL.

来源：https://stackoverflow.com/questions/9091491/what-does-the-path-get-from-the-server-by-getrealpath-in-jsp