因为在处理这个视图之前无需任何业务逻辑，所以我们只需直接调用添加联系人 JSP（把它配置成全局转发而不是操作）。

Since there is no business logic needed prior to rendering this view, we will simply invoke the Add Contact JSP directly, configuring it as a global forward instead of as an action.

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只有事件处理程序完成了其业务逻辑后，它才会更新全局变量result，以将结果返回到MainScope。

Only when the event handler has finished its business logic, it updates the global variable result in order to return the result to MainScope.

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它利用Blueprint容器的功能来管理持久性上下文和全局事务，以确保业务逻辑的开发和单元测试尽可能保持简单。

It leverages the Blueprint container's ability to manage both persistence contexts and global transactions to ensure the business logic remains as simple as possible to develop and unit test.

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