web項目buildPath與lib的區別

今天新建了個web項目，試了下buildPath來添加jar包，結果運行時提示找不到相關jar包；後來將jar包複製到WEB-INF/lib下，運行成功。而後在網上查了下，原來如此：

Build path jars are not a part of your web app.
On the other hand, the WEB-INF/lib jars are a part of your project.

The advantage of having WEB-INF/lib jars over build path jars is that they get bundled into your app when generating a WAR file.
This comes in handy when you want to deploy your app on some server where you don't have access to modify the jars in the build path.