在清单1中架构的开头部分之后，我需要为我的自定义组件定义类型和声明元素。

After the beginning of the schema in Listing 1, I need to define types and declare elements for my custom components.

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在calculator - context . xml(在清单3)中使用自定义名称空间元素声明sca服务、引用和属性，如下所示。

Declare the SCA service, reference, and properties within your calculator-context.xml (in Listing 3) using the custom SCA namespace elements, as shown below.

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WebMethod注释(可选)在方法级别声明，用于自定义作为Web服务操作公开的方法。

The WebMethod annotation (optional) is declared at the method level and is used to customize a method that is exposed as a web service operation.

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