弹簧。 访问webapp \\ resources目录

Question

I have written the following spring controller:

@RequestMapping(method = RequestMethod.GET, value = "/getVideoIcon")
    @ResponseBody
    public FileSystemResource getVideoIcon() throws IOException {
        return new FileSystemResource(new File("/resources/images/video_icon.png"));
    }

The file is located at src\\main\\webapp\\resources\\images

When I invoke the controller I get following error:

HTTP Status 500 - resources\images\video_icon.png (The system cannot find the path specified)

Please help to correct my mistake.

Answer 1

If you need to get the original project's path, you should use getServletContext().getRealPath

@RequestMapping(method = RequestMethod.GET, value = "/getVideoIcon")
@ResponseBody
public FileSystemResource getVideoIcon(HttpServletRequest request) throws IOException {
    String path = request.getSession().getServletContext().getRealPath("/resources/images")+"/video_icon.png";
    return new FileSystemResource(new File(path));
}

If you need to check what the path variable is holding, use System.out.println(path); before the return statement. If you're still experiencing error message after trying the above code, feel free to ask..

Answer 2

You don't need to write a controller to support static resources in Spring application.

Add this to your Spring xml configuration:

<mvc:resources mapping="/image/**" location="/resources/images/" />

In JSP page, you can use it like this:

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>

<img src="<c:url value="/image/video_icon.png" />" />