在上一篇关于Hbase Rest API的文章中介绍了如何查询数据，本章将介绍其Hbase Admin的功能。
- 查询软件版本，包括操作系统，JVM，servlet容器等等。
语法：GET /version
范例：curl http://localhost:8000/version
输出结果：
{"@Stargate":"0.0.1","@OS":"Linux 2.6.18-128.1.6.el5.centos.plusxen amd64","@
JVM":"Sun Microsystems Inc. 1.6.0_13-11.3-b02","@Jetty":"6.1.14","@Jersey":"1
.1.0-ea"}
- 查询hbase集群版本
语法：GET /version/cluster
范例：curl -H "Accept: application/json" http://localhost:8000/version/cluster
输出结果："0.20.0"
相当于HBaseAdmin.getClusterStatus().getHBaseVersion()
- 查询hbase集群状态
语法：GET /status/cluster
范例：curl -H "Accept: application/json" http://localhost:8000/status/cluster
相当于HBaseAdmin.getClusterStatus()
- 列出所有hbase表
语法：GET /
范例：curl -H "Accept: application/json" http://localhost:8000/
输出结果：{"table":[{"name":"table1"},{"name":"table2"}]}
相当于HBaseAdmin.listTableNames()
- 查询hbase表结构
语法：GET /<table>/schema
范例：curl -H "Accept: application/json" http://localhost:8000/table1/schema
输出结果：
{ NAME=> 'table1', IS_META => 'false', COLUMNS => [ { NAME => 'C', DATA_BLOCK_ENCODING => 'NONE', BLOOMFILTER => 'ROW', REPLICATION_SCOPE => '0', VERSIONS => '1', COMPRESSION => 'NONE', MIN_VERSIONS => '0', TTL => '2147483647', KEEP_DELETED_CELLS => 'FALSE', BLOCKSIZE => '65536', IN_MEMORY => 'false', BLOCKCACHE => 'true' }, { NAME => 'M', DATA_BLOCK_ENCODING => 'NONE', BLOOMFILTER => 'ROW', REPLICATION_SCOPE => '0', VERSIONS => '1', COMPRESSION => 'NONE', MIN_VERSIONS => '0', TTL => '2147483647', KEEP_DELETED_CELLS => 'FALSE', BLOCKSIZE => '65536', IN_MEMORY => 'false', BLOCKCACHE => 'true' } ] }
相当于HBaseAdmin.getTableDescriptor(TableName.valueOf("table1"))
- 新建表或者更新表结构
语法：
PUT /<table>/schema
POST /<table>/schema
PUT完全替换表结构，POST只是更新或者新增column family（跟本次更新无关的cf仍然保留）
- 查询region信息
语法：GET /<table>/regions
范例：curl -H "Accept: application/json" http://localhost:8000/table1/regions
输出结果：
pf_entity,,1436346991071.fce2165af7b49f1dd0995ddd535d3a6f. [
id=1436346991071
startKey=''
endKey=''
location='bd02:21003'
]
相当于HBaseAdmin.getTableRegions(TableName.valueOf("table1"))