一、java jdbc连接hive数据库(jdbc连接普通hive数据库)
1、pom.xml配置
<dependency>
<groupId>org.apache.hive</groupId>
<artifactId>hive-jdbc</artifactId>
<scope>2.1.1</scope>
</dependency>
2、驱动
org.apache.hive.jdbc.HiveDriver
3、用传统改的Class.forName,然后DriverManager去拿。
二、java hive连接kerberos
1、pom.xml配置
<dependency>
<groupId>org.apache.hive</groupId>
<artifactId>hive-jdbc</artifactId>
<scope>2.1.1</scope>
</dependency>
<dependency>
<groupId>org.apache.hadoop</groupId>
<artifactId>hadoop-client</artifactId>
<version>2.7.3</version>
</dependency>
<dependency>
<groupId>org.apache.hadoop</groupId>
<artifactId>hadoop-common</artifactId>
<version>2.7.7</version>
</dependency>
<dependency>
<groupId>org.apache.hadoop</groupId>
<artifactId>hadoop-mapreduce-client-core</artifactId>
<version>2.7.7</version>
</dependency>
<dependency>
<groupId>org.apache.hadoop</groupId>
<artifactId>hadoop-hdfs</artifactId>
<version>2.7.3</version>
</dependency>
2、准备好配置文件
在使用idea开发,spark程序时,需要在开发环境模拟hadoop环境,不然,每次都要打jar去集群环境执行调试程序,严重影响开发效率。
winutils.exe是在Windows系统上需要的hadoop调试环境工具,里面包含一些在Windows系统下调试hadoop、spark所需要的基本的工具类
下载及配置winutils.exe:使用winutils.exe,在windows开发环境下,调试下调试hadoop、spark程序-CSDN博客
3、例子
package org.example;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.security.UserGroupInformation;
import java.io.IOException;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
public class Main {
private static String url = "jdbc:hive2://cdh-mgm01:10000/default;principal=hive/cdh-mgm01@FEHORIZON.COM";
private static Connection conn = null;
private static PreparedStatement ps = null;
private static ResultSet rs = null;
public static void main(String[] args) throws SQLException {
String path ="D:\\work\\Kerberos5\\"
\\System.out.println(System.getProperty("user.dir") + "/krb5.conf");
Configuration conf = new Configuration();
conf.set("hadoop.security.authentication", "Kerberos");
System.setProperty("krb5_ini", path + "krb5.conf");
System.setProperty("hive_keytab", path + "\hive.keytab");
//Windows系统 --- winutils.exe文件位置
System.setProperty("hadoop.home.dir","p:\\work\\hadoop-3.0.0")
System.setProperty("java.security.krb5.conf", System.getProperty("krb5_ini"));
UserGroupInformation.setConfiguration(conf);
try {
UserGroupInformation.loginUserFromKeytab("hive/cdh-mgm01@FEHORIZON.COM", System.getProperty("hive_keytab"));
} catch (IOException e) {
e.printStackTrace();
}
try {
// 使用hive用户登陆
conn = DriverManager.getConnection(url, "", "");
} catch (SQLException e) {
e.printStackTrace();
}
showTables();
}
public static void showTables() {
try {
// 进入default数据库
ps = conn.prepareStatement("use default");
ps.execute();
// 展示所有表
rs = ps.executeQuery("show tables");
// 处理结果集
while (rs.next()) {
System.out.println(rs.getString(1));
}
} catch (SQLException e) {
e.printStackTrace();
}
}
};
4、成功运行截图文章来源:https://www.toymoban.com/news/detail-805336.html
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