hive详细笔记(十三)-Hive之JDBC(附带讲解视频 )

使用java语言连接hive服务操作hive中的数据

创建maven项目添加依赖 

<dependencies>
		<dependency>
			<groupId>org.apache.hadoop</groupId>
			<artifactId>hadoop-common</artifactId>
			<version>2.8.5</version>
		</dependency>

		<!-- https://mvnrepository.com/artifact/org.apache.hadoop/hadoop-client -->
		<dependency>
			<groupId>org.apache.hadoop</groupId>
			<artifactId>hadoop-client</artifactId>
			<version>2.8.5</version>
		</dependency>
		<!-- https://mvnrepository.com/artifact/org.apache.hive/hive-jdbc
 数据库的驱动   连接的是何种数据库
 -->
		<dependency>
			<groupId>org.apache.hive</groupId>
			<artifactId>hive-jdbc</artifactId>
			<version>1.2.1</version>
		</dependency>

		<!-- https://mvnrepository.com/artifact/org.apache.hive/hive-metastore -->
		<dependency>
			<groupId>org.apache.hive</groupId>
			<artifactId>hive-metastore</artifactId>
			<version>1.2.1</version>
		</dependency>

		<!-- https://mvnrepository.com/artifact/org.apache.hive/hive-metastore -->
		<dependency>
			<groupId>org.apache.hive</groupId>
			<artifactId>hive-exec</artifactId>
			<version>1.2.1</version>
		</dependency>
	</dependencies>

hive开启hiveserver2 服务  ;  开启hive的远程连接的服务

netstat -nltp | grep 10000    查看hive2服务的10000端口是否启用 

/**
* @Author:  多易教育 - 行哥
*/
public class JDBC2Hive{
	private static String driverName = "org.apache.hive.jdbc.HiveDriver";
	public static void main(String[] args) throws SQLException {
		try {
        // 注册驱动
			Class.forName(driverName);
		} catch (ClassNotFoundException e) {
			e.printStackTrace();
			System.exit(1);
		}
        // 获取连接
		Connection con = DriverManager.getConnection("jdbc:hive2://doit01:10000/demo", "root", "");
        // 获取指定SQL的对象
		Statement stmt = con.createStatement();
		String sql = "select * from tb_case";
        // 执行sql
		ResultSet res = stmt.executeQuery(sql);
        // 处理结果
		if (res.next()) {
			System.out.println(res.getString(1));
		}

	}
}