directory - 向 jetty 添加多个资源目录

Question

希望在 Jetty 中使用多个静态目录。服务器运行时:

  http://localhost:8282/A
  http://localhost:8282/B 
  http://localhost:8282/C

A 放在 X/V/A

B放在Q/Z/B

C放在P/T/C

以下失败:

    ResourceHandler resource_handler = new ResourceHandler();
    resource_handler.setWelcomeFiles(new String[]{"index.html"});
    resource_handler.setResourceBase(HTML_SITE);

    ResourceHandler resource_handler1 = new ResourceHandler();
    resource_handler1.setWelcomeFiles(new String[]{"index.html"});
    resource_handler1.setResourceBase(HTML_CLIENTZONE_SITE);

    // deploy engine
    WebAppContext webapp = new WebAppContext();

    String dir = System.getProperty("user.dir");
    webapp.setResourceBase(getWebAppPath());
    webapp.setContextPath("/");


     HandlerList handlers = new HandlerList();
    handlers.setHandlers(new Handler[]{resource_handler,resource_handler1 ,webapp,  new DefaultHandler()});
    server.setHandler(handlers);

如何添加多个静态资源目录？

Answer 1

从 6.1.12 开始，通过对 WebAppContext 的基础资源使用 ResourceCollection 来支持这一点:

Server server = new Server(8282);
WebAppContext context = new WebAppContext();
context.setContextPath("/");
ResourceCollection resources = new ResourceCollection(new String[] {
    "project/webapp/folder",
    "/root/static/folder/A",    
    "/root/static/folder/B",    
});
context.setBaseResource(resources);
server.setHandler(context);
server.start();

要随后打开文件，请使用 ServletContext(例如，WebAppContext)，它可以是接口(interface)定义的一部分，例如:

  /**
   * Opens a file using the servlet context.
   */
  public default InputStream open( ServletContext context, String filename ) {
    String f = System.getProperty( "file.separator" ) + filename;
    return context.getResourceAsStream( f );
  }

如:

  InputStream in = open( context, "filename.txt" );

这将打开 filename.txt如果它存在于给定目录之一中。请注意，getResourceAsStream 将返回 null ，而不是抛出异常，所以检查它是个好主意:

  public default InputStream validate( InputStream in, String filename )
    throws FileNotFoundException {
    if( in == null ) {
      throw new FileNotFoundException( filename );
    }

    return in;
  }

然后你可以更新 open方法如下:

return validate( context.getResourceAsStream( filename ), filename );