java通过jdbc连接impala

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

public class UpdateMeta
{
static String JDBC_DRIVER = "com.cloudera.impala.jdbc41.Driver";
static String CONNECTION_URL = "jdbc:impala://192.168.0.22:21050/db_1";

public static void main(String[] args)
{
Connection con = null;
ResultSet rs = null;
PreparedStatement ps = null;

try
{
Class.forName(JDBC_DRIVER);
con = DriverManager.getConnection(CONNECTION_URL);
ps = con.prepareStatement("select max(dtime),count(dtime) from achi");
rs = ps.executeQuery();
while (rs.next())
{
System.out.println(rs.getString(1) + '\t' + rs.getLong(2));
}
} catch (Exception e)
{
e.printStackTrace();
} finally
{
//关闭rs、ps和con
}
}
}