hadoop mapper类的相关内容

文章 2024-07-11 来自：开发者社区

hadoop编写Mapper类

在Hadoop MapReduce中，Mapper类主要用于处理输入数据并将其转换为中间键值对。下面是一个基本的Mapper类示例，使用Java编写，该示例将文本文件中的每一行作为输入，并将每个单词映射为其出现次数（1）。 import java.io.IOException; import java.util.StringTokenizer; import org.apache.hadoo...

文章 2022-09-20 来自：开发者社区

Hadoop序列化、概述、自定义bean对象实现序列化接口（Writable）、序列化案例实操、编写流量统计的Bean对象、编写Mapper类、编写Reducer类、编写Driver驱动类

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更新时间 2024-07-12 01:48:06

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