使用java连接hive，并执行hive语句详解

安装hadoop 和 hive我就不多说了，网上太多文章 自己看去

首先，在机器上打开hiveservice

 hive --service hiveserver -p 50000 &

打开50000端口，然后java就可以使用java连了，需要的jar包我发个图片

就这多jar包，必须的

不多说，直接上代码

 package asia.wildfire.hive.service;

 import java.sql.*;
 import java.sql.Date;
 import java.text.SimpleDateFormat;
 import java.util.*;

 /**
  * User: liuxiaochen
  * Date: 13-9-24
  * Time: 下午5:47
  * 修改描述
  */
 public class HiveService {
     private static final String URLHIVE = "jdbc:hive://ip:50000/default";
     private static Connection connection = null;

     public static Connection getHiveConnection() {
         if (null == connection) {
             synchronized (HiveService.class) {
                 if (null == connection) {
                     try {
                         Class.forName("org.apache.hadoop.hive.jdbc.HiveDriver");
                         connection = DriverManager.getConnection(URLHIVE, "", "");
                     } catch (SQLException e) {
                         e.printStackTrace();
                     } catch (ClassNotFoundException e) {
                         e.printStackTrace();
                     }
                 }
             }
         }
         return connection;
     }

     public static void createTable() throws SQLException {
         String tweetTableSql = "DROP TABLE IF EXISTS hive_crm_tweet2222";
         String createTable1 = "CREATE EXTERNAL TABLE hive_crm_tweet2222(tweet_id string, cuser_id string, created_at bigint, year bigint, month bigint, day bigint, hour bigint, text string, comments_count bigint, reposts_count bigint, source string, retweeted_id string, post_type string, sentiment string, positive_tags_string string, predict_tags_string string, tags_string string) STORED BY 'org.apache.hadoop.hive.dynamodb.DynamoDBStorageHandler' TBLPROPERTIES (\"dynamodb.table.name\" = \"crm_tweet\",\"dynamodb.column.mapping\" = \"tweet_id:tweet_id,cuser_id:cuser_id,created_at:created_at,year:year,month:month,day:day,hour:hour,text:text,comments_count:comments_count,reposts_count:reposts_count,source:source,retweeted_id:retweeted_id,post_type:post_type,sentiment:sentiment,positive_tags_string:positive_tags_string,predict_tags_string:predict_tags_string,tags_string:tags_string\")";
         String commentTableSql = "DROP TABLE IF EXISTS hive_tweet_comment2222";
         String createTable2 = "CREATE EXTERNAL TABLE hive_tweet_comment2222(tweet_id string,comment_id string, cuser_id string, user_id string, created_at bigint, year bigint, month bigint, day bigint, hour bigint, text string, comments_count bigint, reposts_count bigint, source string, topic_id string, post_type string, sentiment string) STORED BY 'org.apache.hadoop.hive.dynamodb.DynamoDBStorageHandler' TBLPROPERTIES (\"dynamodb.table.name\" = \"crm_tweet_comment\",\"dynamodb.column.mapping\" = \"tweet_id:tweet_id,comment_id:comment_id,cuser_id:cuser_id,user_id:user_id,created_at:created_at,year:year,month:month,day:day,hour:hour,text:text,comments_count:comments_count,reposts_count:reposts_count,source:source,topic_id:tweet_id,post_type:post_type,sentiment:sentiment\")";
         String retweetTableSql = "DROP TABLE IF EXISTS hive_tweet_retweet2222";
         String createTable3 = "CREATE EXTERNAL TABLE hive_tweet_retweet2222(tweet_id string, cuser_id string, user_id string, retweet_id string, created_at BIGINT, year BIGINT, month BIGINT, day BIGINT, hour BIGINT, text string, comments_count BIGINT, reposts_count BIGINT, source string, topic_id string, verified_type BIGINT, post_type string, sentiment string) STORED BY 'org.apache.hadoop.hive.dynamodb.DynamoDBStorageHandler' TBLPROPERTIES (\"dynamodb.table.name\" = \"crm_tweet_retweet\",\"dynamodb.column.mapping\" = \"tweet_id:tweet_id,cuser_id:cuser_id,user_id:user_id,retweet_id:retweet_id,created_at:created_at,year:year,month:month,day:day,hour:hour,text:text,comments_count:comments_count,reposts_count:reposts_count,source:source,topic_id:tweet_id,verified_type:verified_type,post_type:post_type,sentiment:sentiment\")";

         Statement stmt = getHiveConnection().createStatement();
         stmt.executeQuery(tweetTableSql);
         stmt.executeQuery(createTable1);
         stmt.executeQuery(commentTableSql);
         stmt.executeQuery(createTable2);
         stmt.executeQuery(retweetTableSql);
         stmt.executeQuery(createTable3);
     }

     public static void selectTweet() throws SQLException {
         long aaa = System.currentTimeMillis();
         long start = DateUtils.getNDaysAgo(DateUtils.getMidNight(), 15).getTime().getTime();
         long end = DateUtils.getNDaysAgo(DateUtils.getMidNight(), 13).getTime().getTime();
         String sql = "select cuser_id, count(*) as tw_hour, year, month, day from hive_crm_tweet2222 where created_at > ? and created_at < ? and cuser_id = ? group by cuser_id, year, month, day, hour";
         PreparedStatement pstm = getHiveConnection().prepareStatement(sql);
         pstm.setLong(1, start);
         pstm.setLong(2, end);
         pstm.setString(3, "2176270443");
         ResultSet rss = pstm.executeQuery();
         while (rss.next()) {
             System.out.println("1: " + rss.getString("cuser_id") + "   2: " + rss.getInt("tw_hour") + "   3: " + rss.getInt("year") + "   4: " + rss.getInt("month") + "   5: " + rss.getInt("day"));
         }

         System.out.println(System.currentTimeMillis() - aaa);

     }

     public static void selectTweet22() throws SQLException {
         long aaa = System.currentTimeMillis();
         long start = DateUtils.getNDaysAgo(DateUtils.getMidNight(), 15).getTime().getTime();
         long end = DateUtils.getNDaysAgo(DateUtils.getMidNight(), 13).getTime().getTime();
         String sql = "select cuser_id, created_at, tweet_id from hive_crm_tweet2222 where created_at > ? and created_at < ? and cuser_id = ?";
         PreparedStatement pstm = getHiveConnection().prepareStatement(sql);
         pstm.setLong(1, start);
         pstm.setLong(2, end);
         pstm.setString(3, "2176270443");
         ResultSet rss = pstm.executeQuery();
         SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH");
         while (rss.next()) {
             long cc = Long.valueOf(String.valueOf(rss.getInt("created_at")) + "000");
             java.util.Date date = new java.util.Date(cc);
             System.out.println(dateFormat.format(date));
             System.out.println(rss.getString("cuser_id") + " " + rss.getString("tweet_id"));
         }

         System.out.println(System.currentTimeMillis() - aaa);

     }

     public static void main(String[] args) throws ClassNotFoundException, SQLException {
 //        Class.forName("org.apache.hadoop.hive.jdbc.HiveDriver");
 //        String querySQL = "SELECT a.* FROM test_time a";
 //
 //        Connection con = DriverManager.getConnection(URLHIVE, "", "");
 //        Statement stmt = con.createStatement();
 //        ResultSet res = stmt.executeQuery(querySQL);   // 执行查询语句
 //
 //        while (res.next()) {
 //            System.out.println("Result: key:" + res.getString(1) + "  –>  value:" + res.getString(2));
 //        }
         selectTweet22();

 //        SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH");
 //        System.out.println(dateFormat.format(new java.util.Date()));
     }
 }

代码如上，就这么多，当然复杂的逻辑，还需要你自己处理，谢谢