java project 和 web project

java project 是直接运行本地代码

web project 是通过网站来运行代码

java project 是不能加载到tomcat 上去的，会报

no projects are available for deployment to this server,either they all have already been deployed to this server or no deployable projects havebenn found

即

?没有项目可用于部署到该服务器

解决

java project项目名右键-myeclipse - Add Web Project Capilities

变成了web project

?