Spark报错：ClassNotFoundException: com.mysql.jdbc.Driver和Public Key Retrieval is not allowed

执行下面这条往mysql数据库插入数据的语句，触发了下面两条错误：

data_df.write.jdbc(url,tablename,'append', prop)

错误一： ClassNotFoundException: com.mysql.jdbc.Driver

• ClassNotFoundException: com.mysql.jdbc.Driver

错误一解决方法

• 把mysql的jar包mysql-connector-java-5.1.49.jar放到pyspark的jars目录下/site-packages/pyspark/jars

错误二：Public Key Retrieval is not allowed

• Public Key Retrieval is not allowed

错误二解决方法

• 配置连接数据库的url时，加上&allowPublicKeyRetrieval=true
• 代码中既可以加在url后面，也可以加在prop中，如下所示
• “allowPublicKeyRetrieval”:“true”

prop={
    
    "user":user,"password":password,"driver":"com.mysql.jdbc.Driver","allowPublicKeyRetrieval":"true"}
data_df.write.jdbc(url,tablename,'append', prop)

错误三：Establishing SSL connection without server’s identity verification is not recommended

• Establishing SSL connection without server’s identity verification is not recommended

错误三解决方法

• url后面加上如下一串参数
• ?useUnicode=true&characterEncoding=utf-8&useSSL=false

url='jdbc:mysql://10.10.128.146/unified_view_test?useUnicode=true&characterEncoding=utf-8&useSSL=false'

至此，并能够成功往mysql数据库中插入数据