eclispe创建Hadoop，缺少包

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.IntWritable;
import org.apache.hadoop.io.Text;
 
import org.apache.hadoop.mapreduce.Job;
import org.apache.hadoop.mapreduce.Mapper;
import org.apache.hadoop.mapreduce.Reducer;
import org.apache.hadoop.mapreduce.lib.input.FileInputFormat;
import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat;

报红

解决

引入hadoop安装($HADOOP_HOME)目录下的

share/hadoop/common/hadoop-common-3.1.1.jar

share/hadoop/common/lib/*.jar

share/hadoop/mapreduce/*.jar

share/hadoop/hdfs/hadoop-hdfs-client-3.1.1.jar

share/hadoop/yarn/*.jar

eclipse引入其他包(管理库)

右键你的工程，点击Properties

选择Java Build Path,，然后选择libraries，选择Add External JARs

然后选择你的jar包即可