请教个关于spring mvc PageNotFound的问题

测试环境在之间本来是没有问题的，今天突然要做些测试于是启动项目，就出现如下的问题，发现很多请求都报pagenotfound 的错误，根据提示js和gif的文件其实都是在的，项目启动是正常的。请高人指点下 小弟不甚感激！！！

2012-09-27 18:22:43,797 WARN [org.springframework.web.servlet.PageNotFound] -No mapping found for HTTP request with URI [/biz/js/jquery-1.5.1.min.js] in DispatcherServlet with name 'hisun'
  2012-09-27 18:22:43,828 WARN [org.springframework.web.servlet.PageNotFound] -No mapping found for HTTP request with URI [/biz/images/login-top-bg.gif] in DispatcherServlet with name 'hisun'
  2012-09-27 18:22:43,845 WARN [org.springframework.web.servlet.PageNotFound] -No mapping found for HTTP request with URI [/biz/images/login-wel.gif] in DispatcherServlet with name 'hisun'
  2012-09-27 18:22:43,860 WARN [org.springframework.web.servlet.PageNotFound] -No mapping found for HTTP request with URI [/biz/images/login_bg.jpg] in DispatcherServlet with name 'hisun'
  2012-09-27 18:22:43,873 WARN [org.springframework.web.servlet.PageNotFound] -No mapping found for HTTP request with URI [/biz/images/btn-bg2.gif] in DispatcherServlet with name 'hisun'
  2012-09-27 18:22:43,894 WARN [org.springframework.web.servlet.PageNotFound] -No mapping found for HTTP request with URI [/biz/images/login-content-bg.gif] in DispatcherServlet with name 'hisun'
  2012-09-27 18:22:43,908 WARN [org.springframework.web.servlet.PageNotFound] -No mapping found for HTTP request with URI [/biz/images/logo2.png] in DispatcherServlet with name 'hisun'