Dataweave - 每行对象的对象数组答案

【问题标题】：Dataweave - Array of Objects to Object per lineDataweave - 每行对象的对象数组
【发布时间】：2019-06-24 15:46:42
【问题描述】：

我的输入是Array of Java Objects：

[{"name"="Demo","platform"=[{"id"="1","value"="ios"},{"id"="2","value"="android"}],"language"=[{"id"="1","value"="eng"}],"date"="20/05/2018"}, {"name"="Kernel","platform"=[{"id"="1","value"="macos"},{"id"="2","value"="linux"}],"language"=[{"id"="1","value"="ger"}],"date"="20/05/2018"}]

每个Java Object 在平台和语言键中包含数组，如下例：

{"name"="Demo","platform"=[{"id"="1","value"="ios"},{"id"="2","value"="android"}],"language"=[{"id"="1","value"="eng"}],"date"="20/05/2018"}

这是text/plain 类型中预期的输出：

{"name":"Demo","platform":[{"id":"1","value":"ios"},{"id":"2","value":"android"}],"language":[{"id":"1","value":"eng"}],"date":"20/05/2018"}
{"name":"Kernel","platform":[{"id":"1","value":"macos"},{"id":"2","value":"linux"}],"language":[{"id":"1","value":"ger"}],"date":"20/05/2018"}

从Java到JSON的每个对象
Indent=false 每行
对象之间没有括号或逗号。每行每个对象
不得影响平台和语言键数组

是否可以在不使用字符串替换的情况下应用它？

【问题讨论】：

标签： arrays mule tostring dataweave

【解决方案1】：

因此您可以使用 write 函数将每个元素转换为 application/json 并使用 writer 属性 indent=false

%dw 2.0
output text/plain
---
payload map ((item, index) -> write(item, "application/json", {indent: false})) reduce ((item, accumulator) -> item ++ "\n" ++ accumulator)

或者如果你使用mule 4.2，你可以直接使用application/x-ndjson，它应该可以直接工作

%dw 2.0
output application/x-ndjson
---
payload

【讨论】：