WebUtils.java 文件源码

/**
 * Remove the system property that points to the web app root directory.
 * To be called on shutdown of the web application.
 * @param servletContext the servlet context of the web application
 * @see #setWebAppRootSystemProperty
 */
public static void removeWebAppRootSystemProperty(ServletContext servletContext) {
    Assert.notNull(servletContext, "ServletContext must not be null");
    String param = servletContext.getInitParameter(WEB_APP_ROOT_KEY_PARAM);
    String key = (param != null ? param : DEFAULT_WEB_APP_ROOT_KEY);
    System.getProperties().remove(key);
}