Hadoop：如何在配置中保存Map对象 [英] Hadoop: How to save Map object in configuration

问题描述

任何想法如何将Map对象设置为org.apache.hadoop.conf.Configuration？

Any idea how can I set Map object into org.apache.hadoop.conf.Configuration?

推荐答案

序列化您的地图放入JSON中，然后将其作为字符串放入配置中。
无法将整个对象放入它中，因为整个配置将被编写为XML文件。

Serialize your map into JSON and then put it as string in your configuration. There is no way to put a whole object into it, because the whole configuration will be written as a XML file.

GSON非常擅长： http://code.google.com/p/google-gson/
以下是有关如何序列化集合的教程： http://sites.google.com/site / gson / gson-user-guide＃TOC-Collections-Examples

GSON is quite good at it: http://code.google.com/p/google-gson/ Here is the tutorial about how to serialize collections: http://sites.google.com/site/gson/gson-user-guide#TOC-Collections-Examples

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