hive-通过Java API操作

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通过Java API操作hive，算是测试hive第三种对外接口

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测试hive 服务启动

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 package org.admln.hive;

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

 public class testHive {

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

     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:hive://192.168.126.133:10000/default", "hive", "hadoop");
         Statement stmt = con.createStatement();
         String tableName = "hellohive";
         stmt.execute("drop table if exists " + tableName);
         stmt.execute("create table " + tableName +
                                      " (key int, value string)");
         System.out.println("Create table success!");
         // show tables
         String sql = "show tables '" + tableName + "'";
         System.out.println("Running: " + sql);
         ResultSet 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));
         }

         sql = "select * from " + tableName;
         res = stmt.executeQuery(sql);
         while (res.next()) {
             System.out.println(String.valueOf(res.getInt(1)) + "\t"
                                                + res.getString(2));
         }

         sql = "select count(1) from " + tableName;
         System.out.println("Running: " + sql);
         res = stmt.executeQuery(sql);
         while (res.next()) {
             System.out.println(res.getString(1));
         }
     }
 }

结果：

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jdbc链接中后面两个参数不应该是用户名和密码，我傻乎乎的都天上，但是测试无论填什么或者不填都可以链接成功

为什么会这样，难道hive默认谁都可以链接？

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用到的jar包

 hadoop-2.2.0/share/hadoop/common/hadoop-common-2.2.0.jar
 $HIVE_HOME/lib/hive-exec-0.11.0.jar
 $HIVE_HOME/lib/hive-jdbc-0.11.0.jar
 $HIVE_HOME/lib/hive-metastore-0.11.0.jar
 $HIVE_HOME/lib/hive-service-0.11.0.jar
 $HIVE_HOME/lib/libfb303-0.9.0.jar
 $HIVE_HOME/lib/commons-logging-1.0.4.jar
 $HIVE_HOME/lib/slf4j-api-1.6.1.jar

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代码是摘抄的。

http://www.iteblog.com/archives/846

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