摘要： 以前一直分不清 authentication 和 authorization，其实很简单，举个例子来说：你要登机，你需要出示你的 passport 和 ticket，passport 是为了证明你张三确实是你张三，这就是 authentication；而机票是为了证明你张三确实买了票可以上飞机，这就是 authorization。在 computer science 领域再举个例子：你要登陆论坛，... 阅读全文

摘要： Adding a Connection using Draw2dDraw2d offers a special type of figure, called a connection, for connectingtwo figures. To create a connection in Draw2d, it is first necessary to establishthe two endpoints of the connection. These endpoints are called the source andthe target anchors. Endpoints are 阅读全文