PortletUtils.java 文件源码

/**
 * Return the real path of the given path within the web application,
 * as provided by the portlet container.
 * <p>Prepends a slash if the path does not already start with a slash,
 * and throws a {@link java.io.FileNotFoundException} if the path cannot
 * be resolved to a resource (in contrast to
 * {@link javax.portlet.PortletContext#getRealPath PortletContext's {@code getRealPath}},
 * which simply returns {@code null}).
 * @param portletContext the portlet context of the web application
 * @param path the relative path within the web application
 * @return the corresponding real path
 * @throws FileNotFoundException if the path cannot be resolved to a resource
 * @see javax.portlet.PortletContext#getRealPath
 */
public static String getRealPath(PortletContext portletContext, String path) throws FileNotFoundException {
    Assert.notNull(portletContext, "PortletContext must not be null");
    // Interpret location as relative to the web application root directory.
    if (!path.startsWith("/")) {
        path = "/" + path;
    }
    String realPath = portletContext.getRealPath(path);
    if (realPath == null) {
        throw new FileNotFoundException(
                "PortletContext resource [" + path + "] cannot be resolved to absolute file path - " +
                "web application archive not expanded?");
    }
    return realPath;
}