Json 在Nifi中转换/舍入十进制数

我试图将一个JSON文件（使用ApacheNIFI）发布到一个只接受最多10位小数的应用程序上

JSON格式：

{
  "timestamp" : "2016-04-17",
  "zoom" : 13,
  "dc" : 100,
  "CloudCoverPercentage" : 74.707,
  "mean" : 0.18735192480231655,
  "num" : 127,
  "FirstQuartile" : 0.142807444773004,
  "median" : 0.17882054533925174,
  "max" : 0.32004310344827586,
  "min" : 0.059890294413970674,
  "ThirdQuartile" : 0.22603810187853218,
  "StandardDeviation" : 0.06846369990524923
}

问：如何在ApacheNIFI中转换每个十进制值，使其只有10位小数？

---

我在某个地方读到，jolttransfermjson可用于此。如何为此类操作编写Jolt规范？

您可以将

UpdateRecord

与

jsonReader

（推断模式）、

jsonNetWriter

（继承模式）一起使用

输入：

{
  "timestamp" : "2016-04-17",
  "zoom" : 13,
  "dc" : 100,
  "CloudCoverPercentage" : 74.707,
  "mean" : 0.18735192480231655,
  "num" : 127,
  "FirstQuartile" : 0.142807444773004,
  "median" : 0.17882054533925174,
  "max" : 0.32004310344827586,
  "min" : 0.059890294413970674,
  "ThirdQuartile" : 0.22603810187853218,
  "StandardDeviation" : 0.06846369990524923
}

[ {
  "timestamp" : "2016-04-17",
  "zoom" : 13,
  "dc" : 100,
  "CloudCoverPercentage" : 74.707,
  "mean" : 0.18735192480231655,
  "num" : 127,
  "FirstQuartile" : 0.142807444773004,
  "median" : 0.1788205453,
  "max" : 0.32004310344827586,
  "min" : 0.059890294413970674,
  "ThirdQuartile" : 0.22603810187853218,
  "StandardDeviation" : 0.06846369990524923
} ]

输出：

{
  "timestamp" : "2016-04-17",
  "zoom" : 13,
  "dc" : 100,
  "CloudCoverPercentage" : 74.707,
  "mean" : 0.18735192480231655,
  "num" : 127,
  "FirstQuartile" : 0.142807444773004,
  "median" : 0.17882054533925174,
  "max" : 0.32004310344827586,
  "min" : 0.059890294413970674,
  "ThirdQuartile" : 0.22603810187853218,
  "StandardDeviation" : 0.06846369990524923
}

[ {
  "timestamp" : "2016-04-17",
  "zoom" : 13,
  "dc" : 100,
  "CloudCoverPercentage" : 74.707,
  "mean" : 0.18735192480231655,
  "num" : 127,
  "FirstQuartile" : 0.142807444773004,
  "median" : 0.1788205453,
  "max" : 0.32004310344827586,
  "min" : 0.059890294413970674,
  "ThirdQuartile" : 0.22603810187853218,
  "StandardDeviation" : 0.06846369990524923
} ]

---

如何构造此json？首先，我使用invokeHTTP从API端点获得了它。谢谢！这比executeScript（ECMA）选项简单得多。