HBase学习3（win下使用Eclipse搭建hbase开发环境）

爱被打了一巴掌 2022-05-26 08:50 193阅读 0赞

## 第一步：创建一个java project命名为wujiadong\_hbase ##

![761429-20161220111812057-1447786419.png][]

## 第二步：在该工程下创建一个folder命名为lib（储存依赖的jar包） ##

![761429-20161220111824245-487055093.png][]

## 第三步：将集群中的hbase安装目录下载一份到win下，将hbase下lib目录（I:\\data science\\hbase\\hbase-0.9\\lib）中所有的jar包复制到刚才创建lib文件夹下 ##

复制进去之后，选中lib文件夹下的所有jar包，右键Build Path——Add to build Path

## 第三步：新建一个java类命名为HBaseDeom，就可以开始写java代码了 ##

![761429-20161220111842729-507646442.png][]

一个创建hbase\_test表的代码示例

package wujiadong_hbase;
    
    import java.io.IOException;
    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;
    import org.apache.hadoop.hbase.TableName;
    import org.apache.hadoop.conf.Configuration;
    
    public class HBaseDeom {
    
        public static void main(String[] args)throws IOException {
            // TODO Auto-generated method stub
            // Instantiating configuration class
               Configuration con = HBaseConfiguration.create();
               con.set("hbase.rootdir","hdfs://spark1:9000/hbase" );
               con.set("hbase.zookeeper.quorum", "192.168.220.144,192.168.220.145,192.168.220.146");
    
               // Instantiating HbaseAdmin class
               HBaseAdmin admin = new HBaseAdmin(con);
    
               // Instantiating table descriptor class
               HTableDescriptor tableDescriptor = new HTableDescriptor(TableName.valueOf("hbase_test"));
    
               // Adding column families to table descriptor
               tableDescriptor.addFamily(new HColumnDescriptor("personal"));
               tableDescriptor.addFamily(new HColumnDescriptor("professional"));
    
    
               // Execute the table through admin
               admin.createTable(tableDescriptor);
               System.out.println(" Table created ");
        }
    
    }

## 第四步：开启zookeeper，hadoop，hbase集群，确保都正常 ##

查看hbase是否启动成功，进入hbase shell，输入status
    hbase(main):013:0> status
    2 servers, 0 dead, 13.5000 average load
    
    注释：0 dead说明habse启动成功

## 第五步：运行java代码 ##

### 运行结果如下 ###

![761429-20161220111857323-1280635517.png][]

![761429-20161220111905276-490943646.png][]

### 运行报错 ###

org.apache.hadoop.hbase.MasterNotRunningException: Can't get connection to ZooKeeper: KeeperErrorCode = OperationTimeout

### 报错原因 ###

windows下开发HBase应用程序，HBase部署在linux环境中，在运行调试时出现无法找到主机

### 解决方法 ###

在C:\\WINDOWS\\system32\\drivers\\etc\\hosts文件中添加如下映射信息

192.168.220.144 spark1
    192.168.220.145 spark2
    192.168.220.146 spark3

参考资料[java.net.UnknownHostException: unknown host:xxxx异常解决办法][java.net.UnknownHostException_ unknown host_xxxx]

[761429-20161220111812057-1447786419.png]: /images/20220526/7e286553fc2948e0b1d4754a648b5225.png
[761429-20161220111824245-487055093.png]: /images/20220526/4ca47bff913d47a9a817cbd62b98c322.png
[761429-20161220111842729-507646442.png]: /images/20220526/70238477d61746d9a90ef66f37988e6f.png
[761429-20161220111857323-1280635517.png]: /images/20220526/96c45a77fc7d40dc888b6a1ce75c4c89.png
[761429-20161220111905276-490943646.png]: /images/20220526/36b8856fdf41468895bb319eab35c0f5.png
[java.net.UnknownHostException_ unknown host_xxxx]: http://blog.csdn.net/wzygis/article/details/45643233