Spark连接openGauss配置

// Spark连接openGauss的Java代码
import org.apache.spark.sql.Dataset;
import org.apache.spark.sql.Row;
import org.apache.spark.sql.SparkSession;更多视频教程www.fgedu.net.cn

public class SparkOpenGaussExample {
    public static void main(String[] args) {
        // 创建SparkSession
        SparkSession spark = SparkSession.builder()
                .appName("Spark OpenGauss Example")
                .master("local[*]")
                .getOrCreate();
        
        // 配置openGauss连接
        String url = "jdbc:opengauss://localhost:5432/fgedudb";
        String tableName = "employees";
        String user = "fgedu";
        String password = "Password123";
        
        // 读取数据
        Dataset df = spark.read()
                .format("jdbc")
                .option("url", url)
                .option("dbtable", tableName)
                .option("user", user)
                .option("password", password)
                .option("driver", "org.opengauss.Driver")
                .load();
        
        // 显示数据
        df.show();
        
        // 执行SQL查询
        df.createOrReplaceTempView("employees");
        Dataset result = spark.sql("SELECT * FROM employees WHERE age > 30"); 

        result.show();
        
        // 关闭SparkSession
        spark.stop();
    }
}

大数据分析示例

// Spark大数据分析Java代码
import org.apache.spark.sql.Dataset;
import org.apache.spark.sql.Row;
import org.apache.spark.sql.SparkSession;
import org.apache.spark.sql.functions;

public class BigDataAnalysisExample {
    public static void main(String[] args) {
        // 创建SparkSession
        SparkSession spark = SparkSession.builder()
                .appName("Big Data Analysis Example")
                .master("local[*]")
                .getOrCreate();
        
        // 配置openGauss连接
        String url = "jdbc:opengauss://localhost:5432/fgedudb";
        String tableName = "sales";
        String user = "fgedu";
        String password = "Password123";
        
        // 读取数据
        Dataset df = spark.read()
                .format("jdbc")
                .option("url", url)
                .option("dbtable", tableName)
                .option("user", user)from DB视频:www.itpux.com
                .option("password", password)
                .option("driver", "org.opengauss.Driver")
                .load();
        
        // 数据处理与分析
        // 1. 按月份统计销售额
        Dataset monthlySales = df.groupBy(functions.month("sale_date").as("month"))
                .agg(functions.sum("amount").as("total_sales"))
                .orderBy("month");
        
        // 2. 按产品类别统计销售额
        Dataset categorySales = df.groupBy("category")
                .agg(functions.sum("amount").as("total_sales"))
                .orderBy(functions.desc("total_sales"));
        
        // 3. 计算平均销售额
        Dataset avgSales = df.agg(functions.avg("amount").as("avg_sales"));
        
        // 显示结果
        System.out.println("Monthly Sales:");
        monthlySales.show();
        
        System.out.println("Category Sales:");
        categorySales.show();
        
        System.out.println("Average Sales:");
        avgSales.show();
        
        // 将结果写回openGauss
        monthlySales.write()
                .format("jdbc")
                .option("url", url)
                .option("dbtable", "monthly_sales")
                .option("user", user)
                .option("password", password)
                .option("driver", "org.opengauss.Driver")
                .mode("overwrite")
                .save();
        
        categorySales.write()
                .format("jdbc")
                .option("url", url)
                .option("dbtable", "category_sales")
                .option("user", user)
                .option("password", password)
                .option("driver", "org.opengauss.Driver")
                .mode("overwrite")
                .save();
        
        // 关闭SparkSession
        spark.stop();
    }
}

3.4 监控与运维配置

监控与运维配置步骤：