HBase基本操作-Java实现

创建Table

 public static void createTable(String tableName){
         try {
             HBaseAdmin hbaseAdmin = new HBaseAdmin(HBaseConfiguration.create());

             if(hbaseAdmin.tableExists(tableName)){
                 hbaseAdmin.disableTable(tableName);
                 hbaseAdmin.deleteTable(tableName);
                 System.out.println("Table "+ tableName +" is already exist");
             }

 //            HTableDescriptor hTableDescriptor = new HTableDescriptor(tableName);
             //新版 API
             HTableDescriptor hTableDescriptor = new HTableDescriptor(TableName.valueOf(tableName));
             hTableDescriptor.addFamily(new HColumnDescriptor("name"));
             hTableDescriptor.addFamily(new HColumnDescriptor("course"));
             hTableDescriptor.addFamily(new HColumnDescriptor("address"));
             hbaseAdmin.createTable(hTableDescriptor);

             hbaseAdmin.close();
             System.out.println("Create table "+ tableName +" finish...");

         } catch (IOException e) {
             e.printStackTrace();
         }
     }

插入数据

 public static void insertDate(String tableName){
         try {
             HTable hTable = new HTable(HBaseConfiguration.create(),tableName);
             Put putRow = null;
             for(int i=1;i<=1000;i++){
                 putRow = new Put(("rowkey"+i).getBytes());
                 putRow.add("name".getBytes(), null, getNameByRandom());
                 putRow.add("course".getBytes(), "CHINESE".getBytes(), getScoreByRandom());
                 putRow.add("course".getBytes(), "ENGLISH".getBytes(), getScoreByRandom());
                 putRow.add("course".getBytes(), "MATH".getBytes(), getScoreByRandom());
                 putRow.add("address".getBytes(), "CITY".getBytes(), getNameByRandom());
                 putRow.add("address".getBytes(), "STREET".getBytes(), getNameByRandom());
                 putRow.add("address".getBytes(), "PROVINCE".getBytes(), getNameByRandom());
                 hTable.put(putRow);
             }
             hTable.close();
             System.out.println("Insert finish...");
         } catch (IOException e) {
             e.printStackTrace();
         }
     }

     public static byte[] getScoreByRandom() {
         return (((int)(Math.random()*60)+40)+"").getBytes();
     }

     public static byte[] getNameByRandom() {
         int length = (int)(Math.random()*5)+3;
         String nameStr = ""+(char)((int)(Math.random()*26)+'A');
         for(int i=1;i<length;i++){
             char c = (char)((int)(Math.random()*26)+'a');
             nameStr+=c;
         }
         return nameStr.getBytes();
     }

查询数据

 public static void queryByRowKeyFamily(String tableName,String rowKey,String family){
         try {
             HTable table = new HTable(HBaseConfiguration.create(), tableName);
             Get getRow = new Get(Bytes.toBytes(rowKey));
             getRow.addFamily(family.getBytes());
             Result result = table.get(getRow);

             for(KeyValue kv:result.list()){
                 System.out.println(new String(kv.getFamily())+"."+new String(kv.getQualifier())+" "+new String(kv.getValue()));
             }
             System.out.println(Bytes.toString(result.getRow()));
             table.close();
         } catch (IOException e) {
             e.printStackTrace();
         }
     }