MapReduce操作时Error：The method setInputPaths(JobConf, String) in the type FileInputFormat is not

问题描述
今天在写java API的MapReduce操作时，出现了Error：The method setInputPaths(JobConf, String) in the type FileInputFormat is not的错误

错误原因
导错了包，JobConf是旧API使用的。导入的错误的包是org.apache.hadoop.mapred.FileInputFormat

import org.apache.hadoop.mapred.FileInputFormat;

解决方法
导入org.apache.hadoop.mapreduce.lib.input.FileInputFormat包，替换掉
import org.apache.hadoop.mapred.FileInputFormat;

import org.apache.hadoop.mapreduce.lib.input.FileInputFormat;