BigData_A_A_03-YARN-资源管理和任务调度（1）

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楔子

计算每个月温度最高的2天

data

数据

code

https://github.com/qianlicao51/hd/tree/master/src/main/java/cn/sxt/day1/hdfs/weather

比较时使用了 apache工具类 [比较](https://blog.csdn.net/u012848709/article/details/81750788#t73)

<dependency>
	<groupId>org.apache.commons</groupId>
	<artifactId>commons-lang3</artifactId>
	<version>3.3.2</version>
</dependency>

public int compare(WritableComparable a, WritableComparable b) {
	Weath wa = (Weath) a;
	Weath wb = (Weath) b;
	return new CompareToBuilder()//.append(wb, wa)
			.append(wb.getYear(), wa.getYear()).append(wb.getMon(), wa.getMon())
			.toComparison();
}