Eclipse WTP与Tomcat的干净和干净的工作目录之间的区别(difference between clean and clean working directory in Eclipse WTP with Tomcat)

 我正在使用Eclipse进行Java Web开发。 我安装了WTP和Tomcat。 我通过Eclipse运行Tomcat（这是一个非常标准的配置）。 
 
 我想了解的是： 
 
 当您右键单击“服务器”选项卡中的服务器时，它提供了两个选项： 
 
 
 
 清洁 
 
 
 清洁工作目录 
 
 
 在Google上找不到太多的信息。 人们盲目地选择“清洁”。 有人可以解释两种选择之间的区别吗？ 
 
 先谢谢你。 

I am using Eclipse for Java web development. I have WTP and Tomcat installed. I run Tomcat via Eclipse (which is a pretty standard configuration). 
 
What I want to understand is that:
 
When you right click on a server in the Servers tab, it gives you two options:
 
 
 
Clean
 
 
Clean Working Directory
 
 
Not much information could be found on Google. People are blindly choosing "Clean". Could someone please explain the difference between the two options?
 
Thank you in advance.

原文：https://stackoverflow.com/questions/17006461