spark连接mysql数据库
安装启动检查Mysql服务。
netstat -tunlp (3306)
spark 连接mysql驱动程序。
–cp /usr/local/hive/lib/mysql-connector-java-5.1.40-bin.jar /usr/local/spark/jars
启动 Mysql shell，新建数据库spark，表student。
select * from student;
spark读取MySQL数据库中的数据
spark.read.format("jdbc").option("url", "jdbc:mysql://localhost:3306/spark?useSSL=false") ... .load()
df=spark.read.format("jdbc")
.option("driver","com.mysql.jdbc.Driver")
.option("url","jdbc:mysql://localhost:3306/spark?useSSL=false")
.option("dbtable","student")
.option("user","root")
.option("password","mysql")
.load()
spark向MySQL数据库写入数据
studentDF.write.format(‘jdbc’).option(…).mode(‘append’).save()
studentRDD = spark.sparkContext.parallelize(["5 xiaom 26","6 wang 27"]).map(lambda line:line.split(" "))
