1 package hbase; 2 3 import org.apache.hadoop.conf.Configuration; 4 import org.apache.hadoop.hbase.HBaseConfiguration; 5 import org.apache.hadoop.hbase.HColumnDescriptor; 6 import org.apache.hadoop.hbase.HTableDescriptor; 7 import org.apache.hadoop.hbase.client.Get; 8 import org.apache.hadoop.hbase.client.HBaseAdmin; 9 import org.apache.hadoop.hbase.client.HTable; 10 import org.apache.hadoop.hbase.client.Put; 11 import org.apache.hadoop.hbase.client.Result; 12 import org.apache.hadoop.hbase.client.ResultScanner; 13 import org.apache.hadoop.hbase.client.Scan; 14 15 /** 16 * 要先将HBase相关jar包添加进去！！！ 17 * 18 * 创建表、删除表 (使用HBaseAdmin) 19 * 20 * 插入记录、查询一条记录、遍历所有记录 (使用HTable) 21 * 22 * @author ahu_lichang 23 * 24 */ 25 public class HBaseApp { 26 27 private static final String TABLE_NAME = "table1"; 28 private static final String FAMILY_NAME = "family1"; 29 private static final String ROW_KEY = "rowkey1"; 30 31 public static void main(String[] args) throws Exception { 32 Configuration conf = HBaseConfiguration.create(); 33 /* 34 * hbase操作必备 35 */ 36 conf.set("hbase.rootdir", "hdfs://hadoop0:9000/hbase"); 37 // 使用eclipse时必须添加这个，否则无法定位 38 conf.set("hbase.zookeeper.quorum", "hadoop0"); 39 /* 40 * 创建表 41 */ 42 HBaseAdmin hBaseAdmin = new HBaseAdmin(conf); 43 /* 44 * if (!hBaseAdmin.tableExists(TABLE_NAME)) { HTableDescriptor 45 * hTableDescriptor = new HTableDescriptor(TABLE_NAME); 46 * HColumnDescriptor hColumnDescriptor = new HColumnDescriptor( 47 * FAMILY_NAME); hTableDescriptor.addFamily(hColumnDescriptor); 48 * hBaseAdmin.createTable(hTableDescriptor); } 49 */ 50 51 /* 52 * 添加一条记录 53 */ 54 HTable hTable = new HTable(conf, TABLE_NAME); 55 /* 56 * Put put = new Put(ROW_KEY.getBytes()); 57 * put.add(FAMILY_NAME.getBytes(), "age".getBytes(), "25".getBytes()); 58 * hTable.put(put); 59 */ 60 61 /* 62 * 查询一条记录 63 */ 64 65 /* 66 * Get get = new Get(ROW_KEY.getBytes()); Result result = 67 * hTable.get(get); byte[] value = result 68 * .getValue(FAMILY_NAME.getBytes(), "age".getBytes()); // 69 * keyvalues={rowkey1/family1:age/1491571143625/Put/vlen=2/ts=0} 25 70 * System.out.println(result + " " + new String(value)); 71 */ 72 73 /* 74 * 遍历所有记录 75 */ 76 Scan scan = new Scan(); 77 ResultScanner resultScanner = hTable.getScanner(scan); 78 for (Result result : resultScanner) { 79 byte[] value = result.getValue(FAMILY_NAME.getBytes(), 80 "age".getBytes()); 81 System.out.println(result + " " + new String(value)); 82 } 83 84 hTable.close(); 85 /* 86 * 删除表 87 */ 88 /* 89 * hBaseAdmin.disableTable(TABLE_NAME); 90 * hBaseAdmin.deleteTable(TABLE_NAME); 91 */ 92 } 93 94 }