Appfog 创建java Web 存在的问题

 name: VmcError, endpoint: PUT:/apps/:name, statusCode: 500, code: 310, description: Staging failed: 'Staging task failed:
Staging plugin failed: /opt/cloudfoundry/vcap/staging/lib/vcap/staging/plugin/java_web/plugin.rb:28:in `block in stage_application': Web application staging failed: web.xml not found (RuntimeError)
from /opt/cloudfoundry/vcap/staging/lib/vcap/staging/plugin/java_web/plugin.rb:22:in `chdir'
from /opt/cloudfoundry/vcap/staging/lib/vcap/staging/plugin/java_web/plugin.rb:22:in `stage_application'
from /opt/cloudfoundry/vcap/stager/bin/run_plugin:19:in `<main>'