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文件系统型JSON

功能概述

本文为您介绍连接文件型 JSON 数据的过程。

操作介绍

1. 在系统的门户网站中单击，选择数据源。

2. 在左侧数据源列表或者在右侧图标视图中选择文件型数据源 Json 。

type=info
提示
如未见数据源的连接入口，需请管理员到后台管理的数据源管理中勾选该数据源，仅勾选的数据源可以使用。更多介绍，请见数据源管理。

3. 填写配置信息后单击下一步。

名称： 自定义数据源的名称。

源类型： 选择文件系统。

数据源： 填写 Json 文件所在的路径。

预查询： 查询 Json 数据，可以选择Json路径直接填写路径进行读取；也可以选择SQL语句（使用Json函数）对 Json 数据进行预处理。

Json路径：即解析JSON数据结构并取出指定数据集合的JSON Path表达式，如 $.bookstore.books[*]。有关 JSON Path 的语法，参见http://goessner.net/articles/JsonPath/。
SQL语句（使用Json函数）：使用 Json 函数对 Json 数据进行预处理，可解析数据行的字符串单元格，并且可与其他表进行连接。详见Json 函数详解。

4. 单击创建，创建数据源。

注意事项

当使用本地 Json 文件出现乱码时，请将文件存储为 UTF-8 编码，然后再次上传。
使用 Json 数据源时如果检测到有重名列时，只有首次出现的列会被保留，重名列上的数据会被抛弃。