用Java API在Hbase中创建表

Question

import java.io.IOException;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.HBaseConfiguration;
import org.apache.hadoop.hbase.HColumnDescriptor;
import org.apache.hadoop.hbase.HTableDescriptor;
import org.apache.hadoop.hbase.client.HBaseAdmin;

public class CreateTable {

    public static void main(String[] args) throws IOException {
        Configuration con = HBaseConfiguration.create();
        HBaseAdmin admin = new HBaseAdmin(con);

        HTableDescriptor ht = new HTableDescriptor("emp");

        ht.addFamily(new HColumnDescriptor("add"));
        ht.addFamily(new HColumnDescriptor("dept"));

        admin.createTable(ht);

        System.out.println("Table Created");
    }
}

我已经使用上面的代码来创建Hbase表。我已经下载了所有需要的JAR，并将其添加为when am get错误。但是仍然有很多与动物园管理员有关的错误。我的疑问是，在创建表之前，我是否必须使用JAVA API进行Zookeeper连接。并且我正在使用JDK1.8，请指导我使用JAVA API在Hbase中创建表的确切过程。以下是Zookeeper的错误，但我已经添加了Zookeeper罐子。17/12/11 12:44:10信息zookeeper.zookeeper:客户端环境:zookeeper.version=3.3.1-942149，构建于05/07/2010 17:14 GMT 17/12/11 12:44:10信息zookeeper.zookeeper:客户端环境:host.name=quickstart.cloudera 17/12/11 12:44:10信息zookeeper.zookeeper:Client environment:java.version=1.8.0_144 17/12/11 12:44:10信息zookeeper.zookeeper:Client:java.home=/home/cloudera/jdk1.8.0_144/jre 17/12/11 12:44:10 INFO zookeeper.zookeeper:客户机环境/12/11 12:44:10信息zookeeper.zookeeper:客户端环境:java.library.path=/usr/java/packages/lib/amd64:/usr/lib64:/lib64://lib://usr/自由贸易区

Answer 1

下面的代码对我来说很有效：

        conf = HBaseConfiguration.create();
        admin = new HBaseAdmin(conf);

        TableName tableName =  TableName.valueOf("test");
        HTableDescriptor htd = new HTableDescriptor(tableName);
        HColumnDescriptor hcd = new HColumnDescriptor("data");

        htd.addFamily(hcd);
        admin.createTable(htd);

并在bash_profile中添加以下env变量

export HADOOP_HOME=/Users/karan.verma/Documents/backups/h/hadoop-2.6.4
export PATH=$PATH:$HADOOP_HOME/bin
export PATH=$PATH:$HADOOP_HOME/sbin
export HADOOP_PREFIX=/Users/karan.verma/Documents/backups/h/hadoop-2.6.4
export HADOOP_CONF_DIR=$HADOOP_HOME/etc/hadoop
export HADOOP_MAPRED_HOME=$HADOOP_HOME
export HADOOP_COMMON_HOME=$HADOOP_HOME
export HADOOP_HDFS_HOME=$HADOOP_HOME
export YARN_HOME=$HADOOP_HOME

export HADOOP_COMMON_LIB_NATIVE_DIR=$HADOOP_HOME/lib/native
export HADOOP_OPTS="-Djava.library.path=$HADOOP_HOME/lib"
export HADOOP_CLASSPATH=${JAVA_HOME}/lib/tools.jar