首先报错是：
[hadoop@hadoop000 lib]$ ./streaming.sh
Ivy Default Cache set to: /home/hadoop/.ivy2/cache
The jars for the packages stored in: /home/hadoop/.ivy2/jars
:: loading settings :: url = jar:file:/home/hadoop/app/spark-3.0.0-bin-2.6.0-cdh5.16.2/jars/ivy-2.4.0.jar!/org/apache/ivy/core/settings/ivysettings.xml
org.apache.spark#spark-streaming_2.11 added as a dependency
:: resolving dependencies :: org.apache.spark#spark-submit-parent-77e344fc-074a-4eeb-9448-ec0e19644377;1.0
confs: [default]
:: resolution report :: resolve 157ms :: artifacts dl 1ms
:: modules in use:
---------------------------------------------------------------------
| | modules || artifacts |
| conf | number| search|dwnlded|evicted|| number|dwnlded|
---------------------------------------------------------------------
| default | 0 | 0 | 0 | 0 || 0 | 0 |
---------------------------------------------------------------------
:: retrieving :: org.apache.spark#spark-submit-parent-77e344fc-074a-4eeb-9448-ec0e19644377
confs: [default]
0 artifacts copied, 0 already retrieved (0kB/10ms)
17:47:17 WARN NativeCodeLoader: Unable to load native-hadoop library for your platform… using builtin-java classes where applicable
Error: Failed to load class com.meng.bigdata.project.stream.StreamingApp.
17:47:20 INFO ShutdownHookManager: Shutdown hook called
17:47:20 INFO ShutdownHookManager: Deleting directory /tmp/spark-7b229ce8-9090-4810-888d-1d062ce11549
[hadoop@hadoop000 lib]$

配置如下：
vi streaming.sh

idea代码中的

我clear掉了所有的缓存，重新package生成的jar包，我看配置什么都没错误，老师求解