Hbase java客户端操作

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本文介绍使用Java实现HBase的基本操作，包括创建表和插入数据的过程，通过具体代码实例展示了如何在Java环境中与HBase进行交互。

1，创建表

2，put操作

public class myHbase {

   private static Configuration conf= null;
   static {
       conf=HBaseConfiguration.create();
   }
   /**
   * column familys add column <--->hbase columnName
   * @param tableName
   * @param familys
   * @throws Exception
   */
   public void createTable(String tableName,String[] familys) throws Exception{
       HBaseAdmin admin = new HBaseAdmin(conf);
       if(!admin.tableExists(tableName)){
           HTableDescriptor desc = new HTableDescriptor(tableName);
           for (int i = 0; i < familys.length; i++) {
               desc.addFamily(new HColumnDescriptor(familys[i]));
           }
              admin.createTable(desc);
       }else{
           System.out.println("the table:"+ tableName +" exsists");
       };
   }
   /**
   * @param tableName
   * @param rowKey
   * @param family
   * @param qualifier
   * @param value
   * @throws Exception
   */
   public void putData(String tableName,String rowKey, String family,
           String qualifier, String value) throws Exception {
       HTable ht = new HTable(conf, tableName);
       Put put = new Put(Bytes.toBytes(rowKey));
       put.add(Bytes.toBytes(family), Bytes.toBytes(qualifier), Bytes.toBytes(value));
       ht.put(put);
   }
   public static void main(String [] agrs) throws Exception{
       myHbase h= new myHbase();
       String [] familys = {"family1","family2"};
       h.createTable("mytable", familys);
       h.putData("mytable", "row", "family1", "qualifier:name1", "value1");
   }

}

运行java应用程序：登录hbase shell 发现可以get和scan到数据了：

hbase(main):016:0> scan 'mytable'
ROW                   COLUMN+CELL
row                  column=family1:qualifier:name1, timestamp=1354559928275, v
                      alue=value1
1 row(s) in 0.0410 seconds

hbase(main):017:0> get 'mytable','row','family1:qualifier:name1'
COLUMN                CELL
family1:qualifier:na timestamp=1354559928275, value=value1
me1
1 row(s) in 0.0120 seconds