JDBC Client Sample Code

import java.sql.SQLException;

import java.sql.Connection;

import java.sql.ResultSet;

import java.sql.Statement;

import java.sql.DriverManager;

 

public class HiveJdbcClient {

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

 

  /**

 * @param args

 * @throws SQLException

   */

  public static void main(String[] args) throws SQLException {

      try {

      Class.forName(driverName);

    } catch (ClassNotFoundException e) {

      // TODO Auto-generated catch block

      e.printStackTrace();

      System.exit(1);

    }

    Connection con = DriverManager.getConnection("jdbc:hive://localhost:10000/default", "", "");

    Statement stmt = con.createStatement();

    String tableName = "testHiveDriverTable";

    stmt.executeQuery("drop table " + tableName);

    ResultSet res = stmt.executeQuery("create table " + tableName + " (key int, value string)");

    // show tables

    String sql = "show tables '" + tableName + "'";

    System.out.println("Running: " + sql);

    res = stmt.executeQuery(sql);

    if (res.next()) {

      System.out.println(res.getString(1));

    }

    // describe table

    sql = "describe " + tableName;

    System.out.println("Running: " + sql);

    res = stmt.executeQuery(sql);

    while (res.next()) {

      System.out.println(res.getString(1) + "\t" + res.getString(2));

    }

 

    // load data into table

    // NOTE: filepath has to be local to the hive server

    // NOTE: /tmp/a.txt is a ctrl-A separated file with two fields per line

    String filepath = "/tmp/a.txt";

    sql = "load data local inpath '" + filepath + "' into table " + tableName;

    System.out.println("Running: " + sql);

    res = stmt.executeQuery(sql);

 

    // select * query

    sql = "select * from " + tableName;

    System.out.println("Running: " + sql);

    res = stmt.executeQuery(sql);

    while (res.next()) {

      System.out.println(String.valueOf(res.getInt(1)) + "\t" + res.getString(2));

    }

 

    // regular hive query

    sql = "select count(1) from " + tableName;

    System.out.println("Running: " + sql);

    res = stmt.executeQuery(sql);

    while (res.next()) {

      System.out.println(res.getString(1));

    }

  }

}










https://cwiki.apache.org/confluence/display/Hive/HiveClient