hbase javaAPI创建,删除,查询表操作
package hbase; import java.io.IOException; import java.util.ArrayList; import java.util.List; import org.apache.hadoop.conf.Configuration; import org.apache.hadoop.fs.Path; import org.apache.hadoop.hbase.HBaseConfiguration; import org.apache.hadoop.hbase.HColumnDescriptor; import org.apache.hadoop.hbase.HTableDescriptor; import org.apache.hadoop.hbase.KeyValue; import org.apache.hadoop.hbase.MasterNotRunningException; import org.apache.hadoop.hbase.TableName; import org.apache.hadoop.hbase.ZooKeeperConnectionException; import org.apache.hadoop.hbase.client.Delete; import org.apache.hadoop.hbase.client.Get; import org.apache.hadoop.hbase.client.HBaseAdmin; import org.apache.hadoop.hbase.client.HTable; import org.apache.hadoop.hbase.client.HTablePool; import org.apache.hadoop.hbase.client.Result; import org.apache.hadoop.hbase.client.ResultScanner; import org.apache.hadoop.hbase.client.Scan; import org.apache.hadoop.hbase.filter.CompareFilter.CompareOp; import org.apache.hadoop.hbase.filter.Filter; import org.apache.hadoop.hbase.filter.FilterList; import org.apache.hadoop.hbase.filter.SingleColumnValueFilter; import org.apache.hadoop.hbase.util.Bytes; import org.junit.Test; public class MyHbase { public static Configuration conf; static { conf = HBaseConfiguration.create(); conf.set("hbase.zookeeper.property.clientPort", "2181"); conf.set("hbase.zookeeper.quorum", "192.168.17.6,192.168.17.7,192.168.17.8"); conf.set("hbase.master", "192.168.17.5:60000"); } public static void createTable(String tableName){ try { HBaseAdmin hbaseAdmin = new HBaseAdmin(conf); if(hbaseAdmin.tableExists(tableName)){ hbaseAdmin.disableTable(tableName); hbaseAdmin.deleteTable(tableName); } HTableDescriptor hTableDescriptor = new HTableDescriptor(); hTableDescriptor.addFamily(new HColumnDescriptor(tableName)); hbaseAdmin.createTable(hTableDescriptor); } catch (MasterNotRunningException e) { } catch (ZooKeeperConnectionException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } } public static void dropTable(String tableName) { try { HBaseAdmin admin = new HBaseAdmin(conf); admin.disableTable(tableName); admin.deleteTable(tableName); } catch (MasterNotRunningException e) { e.printStackTrace(); } catch (ZooKeeperConnectionException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } } public static void deleteRow(String tablename, String rowkey) { try { HTable table = new HTable(conf, tablename); List list = new ArrayList(); Delete d1 = new Delete(rowkey.getBytes()); list.add(d1); table.delete(list); System.out.println("删除行成功!"); } catch (IOException e) { e.printStackTrace(); } } /** * 查询所有数据 * @param tableName */ public static void QueryAll(String tableName) { HTablePool pool = new HTablePool(conf, 1000); HTable table = (HTable) pool.getTable(tableName); try { ResultScanner rs = table.getScanner(new Scan()); for (Result r : rs) { System.out.println("获得到rowkey:" + new String(r.getRow())); for (KeyValue keyValue : r.raw()) { System.out.println("列:" + new String(keyValue.getFamily()) + "====值:" + new String(keyValue.getValue())); } } } catch (IOException e) { e.printStackTrace(); } } /** * 单条件查询,根据rowkey查询唯一一条记录 * @param tableName */ public static void QueryByCondition1(String tableName) { HTablePool pool = new HTablePool(conf, 1000); HTable table = (HTable) pool.getTable(tableName); try { Get scan = new Get("abcdef".getBytes());// 根据rowkey查询 Result r = table.get(scan); System.out.println("获得到rowkey:" + new String(r.getRow())); for (KeyValue keyValue : r.raw()) { System.out.println("列:" + new String(keyValue.getFamily()) + "====值:" + new String(keyValue.getValue())); } } catch (IOException e) { e.printStackTrace(); } } /** * 单条件按查询,查询多条记录 * @param tableName */ public static void QueryByCondition2(String tableName) { try { HTablePool pool = new HTablePool(conf, 1000); HTable table = (HTable) pool.getTable(tableName); Filter filter = new SingleColumnValueFilter(Bytes .toBytes("column1"), null, CompareOp.EQUAL, Bytes .toBytes("aaa")); // 当列column1的值为aaa时进行查询 Scan s = new Scan(); s.setFilter(filter); ResultScanner rs = table.getScanner(s); for (Result r : rs) { System.out.println("获得到rowkey:" + new String(r.getRow())); for (KeyValue keyValue : r.raw()) { System.out.println("列:" + new String(keyValue.getFamily()) + "====值:" + new String(keyValue.getValue())); } } } catch (Exception e) { e.printStackTrace(); } } /** * 多个过滤器组合条件查询 * @param tableName */ public static void QueryByCondition3(String tableName) { try { HTablePool pool = new HTablePool(conf, 1000); HTable table = (HTable) pool.getTable(tableName); List<Filter> filters = new ArrayList<Filter>(); Filter filter1 = new SingleColumnValueFilter(Bytes .toBytes("column1"), null, CompareOp.EQUAL, Bytes .toBytes("aaa")); filters.add(filter1); Filter filter2 = new SingleColumnValueFilter(Bytes .toBytes("column2"), null, CompareOp.EQUAL, Bytes .toBytes("bbb")); filters.add(filter2); Filter filter3 = new SingleColumnValueFilter(Bytes .toBytes("column3"), null, CompareOp.EQUAL, Bytes .toBytes("ccc")); filters.add(filter3); FilterList filterList1 = new FilterList(filters); Scan scan = new Scan(); scan.setFilter(filterList1); ResultScanner rs = table.getScanner(scan); for (Result r : rs) { System.out.println("获得到rowkey:" + new String(r.getRow())); for (KeyValue keyValue : r.raw()) { System.out.println("列:" + new String(keyValue.getFamily()) + "====值:" + new String(keyValue.getValue())); } } rs.close(); } catch (Exception e) { e.printStackTrace(); } } public static void main(String[] args) { createTable("mytable"); } }