设置jetty的文件目录不可访问方式

webdefault.xml

 <!-- ==================================================================== -->
  <!-- The default servlet.                                                 -->
  <!-- This servlet, normally mapped to /, provides the handling for static -->
  <!-- content, OPTIONS and TRACE methods for the context.                  -->
  <!-- The following initParameters are supported:                          -->
  <!--  
 *  acceptRanges      If true, range requests and responses are
 *                    supported
 *
 *  dirAllowed        If true, directory listings are returned if no
 *                    welcome file is found. Else 403 Forbidden.
 *
 *  welcomeServlets   If true, attempt to dispatch to welcome files
 *                    that are servlets, but only after no matching static
 *                    resources could be found. If false, then a welcome
 *                    file must exist on disk. If "exact", then exact
 *                    servlet matches are supported without an existing file.
 *                    Default is true.
 *
 *                    This must be false if you want directory listings,
 *                    but have index.jsp in your welcome file list.
 *
 *  redirectWelcome   If true, welcome files are redirected rather than
 *                    forwarded to.
 *
 *  gzip              If set to true, then static content will be served as
 *                    gzip content encoded if a matching resource is
 *                    found ending with ".gz"
 *
 *  resourceBase      Set to replace the context resource base
 *
 *  resourceCache     If set, this is a context attribute name, which the servlet
 *                    will use to look for a shared ResourceCache instance.
 *
 *  relativeResourceBase
 *                    Set with a pathname relative to the base of the
 *                    servlet context root. Useful for only serving static content out
 *                    of only specific subdirectories.
 *
 *  pathInfoOnly      If true, only the path info will be applied to the resourceBase
 *
 *  stylesheet        Set with the location of an optional stylesheet that will be used
 *                    to decorate the directory listing html.
 *
 *  aliases           If True, aliases of resources are allowed (eg. symbolic
 *                    links and caps variations). May bypass security constraints.
 *                    
 *  etags             If True, weak etags will be generated and handled.
 *
 *  maxCacheSize      The maximum total size of the cache or 0 for no cache.
 *  maxCachedFileSize The maximum size of a file to cache
 *  maxCachedFiles    The maximum number of files to cache
 *
 *  useFileMappedBuffer
 *                    If set to true, it will use mapped file buffers to serve static content
 *                    when using an NIO connector. Setting this value to false means that
 *                    a direct buffer will be used instead of a mapped file buffer.
 *                    This file sets the value to true.
 *
 *  cacheControl      If set, all static content will have this value set as the cache-control
 *                    header.
 *
 -->

中配置属性：

  <init-param>

      <param-name>dirAllowed</param-name>
      <param-value>false</param-value>
    </init-param>