java.io.FileNotFoundException: HADOOP_HOME and hadoop.home.dir are unset-hadoop.dll

java.io.FileNotFoundException: HADOOP_HOME and hadoop.home.dir are unset

1，下载Hadoop winutil
winutil

2，配置环境变量HADOOP_HOME

3，把hadoop.dll放入c盘windows/sysyem32下

4，还不行则：

System.setProperty(“hadoop.home.dir”, “D:\hadoop-3.0.0”);