【spark】关于使用idea来编辑scala程序使用spark的问题

Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/hadoop/fs/FSDataInputStream
    at org.apache.spark.SparkConf.loadFromSystemProperties(SparkConf.scala:76)
    at org.apache.spark.SparkConf.<init>(SparkConf.scala:71)
    at org.apache.spark.SparkConf.<init>(SparkConf.scala:58)
    at com.hadoop.sparkPi$.main(sparkPi.scala:9)
    at com.hadoop.sparkPi.main(sparkPi.scala)
Caused by: java.lang.ClassNotFoundException: org.apache.hadoop.fs.FSDataInputStream
    at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:335)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    ... 5 more