【Flink】:ClassNotFoundException: org.apache.flink.streaming.api.functions.source.SourceFunction

很多人在Flink项目在idea中导入依赖后,明明自己的pom包已经导入了,但是运行程序后会出现找不到核心类这种情况,出现如下问题

java.lang.NoClassDefFoundError: org/apache/flink/streaming/api/functions/source/SourceFunction
    at java.lang.Class.getDeclaredMethods0(Native Method)
    at java.lang.Class.privateGetDeclaredMethods(Class.java:2701)
    at java.lang.Class.privateGetMethodRecursive(Class.java:3048)
    at java.lang.Class.getMethod0(Class.java:3018)
    at java.lang.Class.getMethod(Class.java:1784)
    at sun.launcher.LauncherHelper.validateMainClass(LauncherHelper.java:544)
    at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:526)
Caused by: java.lang.ClassNotFoundException: org.apache.flink.streaming.api.functions.source.SourceFunction
    at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    ... 7 more
Error: A JNI error has occurred, please check your installation and try again
Exception in thread "main" 

pom文件引入的依赖如下


    
        org.apache.flink
        flink-java
        1.13.6
        provided
    
    
        org.apache.flink
        flink-clients_2.11
        1.13.6
        provided
    
    
        org.apache.flink
        flink-streaming-java_2.11
        1.13.6
        provided
    

出现这种情况是因为maven依赖的provide,idea需要设置下才能识别provide依赖,否则就在自己执行的时候无法识别导入的类,idea设置方法如下

【Flink】:ClassNotFoundException: org.apache.flink.streaming.api.functions.source.SourceFunction_第1张图片

 【Flink】:ClassNotFoundException: org.apache.flink.streaming.api.functions.source.SourceFunction_第2张图片

 点击应用(注意不要忘记点击应用按钮)后重新执行即可,问题解决

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