Java连接Hive

Hive必须以service模式运行:

hive --service hiveserver2
hiveserver2 --hiveconf hive.server2.thrift.port=20001  

1. 
   

Java maven 项目的pom.xml中加上:

<dependency>
    <groupId>org.apache.hive</groupId>
    <artifactId>hive-jdbc</artifactId>
    <version>2.3.2</version>
</dependency>

Java示例代码:

package cn.pywei.HiveUtil;

import java.sql.*;

public class HiveJDBC {

	private static String driverName = "org.apache.hive.jdbc.HiveDriver";

	private static ResultSet rs = null;

	public static void main(String[] args) throws SQLException {
		try {
			Class.forName(driverName);
		} catch (ClassNotFoundException e) {
			e.printStackTrace();
			System.exit(1);
		}

		Connection con = DriverManager.getConnection("jdbc:hive2://127.0.0.1:10000/default");
		Statement stmt = con.createStatement();
		stmt = con.createStatement();
		String sql = "select dt6,dt7 from ep limit 100";
		rs = stmt.executeQuery(sql);
		while (rs.next()) {
			System.out.println(rs.getString(1)+rs.getString(2));
		}
		con.close();
	}
}