diff --git a/Gemfile~ b/Gemfile~
deleted file mode 100644
index 334f15853..000000000
--- a/Gemfile~
+++ /dev/null
@@ -1,114 +0,0 @@
-source 'https://ruby.taobao.org/'
-
-unless RUBY_PLATFORM =~ /w32/
-  # unix-like only
-  gem 'iconv'
-  gem "rmagick", ">= 2.0.0"
-  gem 'certified'
-end
-
-gem 'net-ssh', '2.9.1'
-gem 'jenkins_api_client'
-gem 'nokogiri'
-
-gem 'wechat',path: 'lib/wechat'
-gem 'grack', path:'lib/grack'
-gem 'gitlab', path: 'lib/gitlab-cli'
-gem 'rest-client'
-gem "mysql2", "= 0.3.18"
-gem 'redis-rails'
-gem 'rubyzip'
-gem 'delayed_job_active_record'#, :group => :production
-gem 'daemons'
-gem 'grape', '~> 0.9.0'
-gem 'grape-entity'
-gem 'rack-cors', :require => 'rack/cors'
-gem 'seems_rateable', '~> 1.0.13'
-gem 'rails', '~> 3.2'
-gem "jquery-rails", "~> 2.0.2"
-gem "i18n", "~> 0.6.0"
-gem 'coderay', '~> 1.1.0'
-gem "fastercsv", "~> 1.5.0", :platforms => [:mri_18, :mingw_18, :jruby]
-gem "builder", "3.0.0"
-gem 'acts-as-taggable-on', '2.4.1'
-gem 'spreadsheet'
-gem 'ruby-ole'
-gem 'rails_kindeditor',path:'lib/rails_kindeditor'
-gem 'binding_of_caller'
-gem 'chinese_pinyin'
-# gem 'sunspot_rails', '~> 1.3.3'
-# gem 'sunspot_solr'
-# gem 'sunspot'
-# gem 'progress_bar'
-gem  'ansi'
-
-gem 'kaminari'
-gem 'elasticsearch-model'
-gem 'elasticsearch-rails'
-
-
-### profile
-#gem 'oneapm_rpm'
-
-group :development do
-  gem 'grape-swagger'
-  gem 'better_errors', '~> 1.1.0'
-  # gem "query_reviewer"
-  # gem 'rack-mini-profiler', '~> 0.9.3'
-  if RUBY_PLATFORM =~ /w32/
-    gem  'win32console'
-  end
-end
-
-group :development, :test do
-  unless RUBY_PLATFORM =~ /w32/
-    gem 'pry-rails'
-    if RUBY_VERSION >= '2.0.0'
-      gem 'pry-byebug'
-    end
-    gem 'pry-stack_explorer'
-    if RUBY_PLATFORM =~ /darwin/
-      gem 'puma'
-    end
-  end
-
-  gem 'rspec-rails', '~> 3.0'
-  gem 'factory_girl_rails'
-end
-
-# Gems used only for assets and not required
-# in production environments by default.
-group :assets do
-  gem 'sass-rails',   '~> 3.2.3'
-  gem 'coffee-rails', '~> 3.2.1'
-
-  # See https://github.com/sstephenson/execjs#readme for more supported runtimes
-  # gem 'therubyracer', :platforms => :ruby
-
-  gem 'uglifier', '>= 1.0.3'
-end
-
-# Optional gem for LDAP authentication
-group :ldap do
-  gem "net-ldap", "~> 0.3.1"
-end
-
-
-# Optional gem for OpenID authentication
-group :openid do
-  gem "ruby-openid", "~> 2.1.4", :require => "openid"
-  gem "rack-openid"
-end
-
-
-database_file = File.join(File.dirname(__FILE__), "config/database.yml")
-if File.exist?(database_file)
-else
-  warn("Please configure your config/database.yml first")
-end
-
-# Load plugins' Gemfiles
-Dir.glob File.expand_path("../plugins/*/Gemfile", __FILE__) do |file|
-  puts "Loading #{file} ..." if $DEBUG # `ruby -d` or `bundle -v`
-  instance_eval File.read(file)
-end
diff --git a/app/controllers/student_work_controller.rb b/app/controllers/student_work_controller.rb
index 926eac67c..bc1b97a2f 100644
--- a/app/controllers/student_work_controller.rb
+++ b/app/controllers/student_work_controller.rb
@@ -197,7 +197,7 @@ class StudentWorkController < ApplicationController
                   resultObj[:status] = 0
                 end
                 student_work.save!
-                resultObj[:time] = student_work_test.created_at.to_s(:db)
+                resultObj[:time] = student_work_test.created_at.strftime(format='%Y-%m-%d %H:%M:%S')
                 resultObj[:index] = student_work.student_work_tests.count
               end