feat:线下课：创建DataFrame、DataFrameDSL、DataFrameSql、SparkOnHive

src/main/scala/org/example/sql/DataFrameSql.scala

@@ -0,0 +1,35 @@
+package org.example.sql
+
+import org.apache.spark.sql.SparkSession
+
+object DataFrameSql {
+  def main(args: Array[String]): Unit = {
+    val spark = SparkSession.builder()
+      .master("local[*]")
+      .appName("DataFrameDemo")
+      .getOrCreate()
+
+    val dfSql = spark.read
+      .format("jdbc")
+      .option("url", "jdbc:mysql://192.168.48.10:3306/gmall")
+      .option("dbtable", "user_info")
+      .option("user", "root")
+      .option("password", "root123456")
+      .load()
+
+    println("============show============")
+    dfSql.show()
+
+    println("============sql============")
+    dfSql.createTempView("user_info")
+    spark.sql(
+      """
+        |select
+        |login_name
+        |,name
+        |,user_level
+        |from user_info
+        |""".stripMargin).show()
+
+  }
+}