转换将包括重新设置消息的格式、连接字符串，并基于某些字段的值执行数字计算。

The transformation will include reformatting of the message, concatenating the string, and doing a numeric calculation based on the values of certain fields.

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这包括将JSON对象转换成可放入HTTP POST请求体中的字符串。

This involves converting the JSON object into a string that can be put in the HTTP POST request body.

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如需更详细的说明，XML Bible(请参阅参考资料)会给您有关XSL和XPath的极好概述，包括数字转换、比较和字符串操作。

If you need more detailed instructions, The XML Bible (see Resources) gives an excellent overview of XSL and XPath, including number conversions, comparisons and string operations.

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