hbaseAPI DML数据增删改

    public static void main(String[] args) throws IOException {
        System.setProperty("hadoop.home.dir", "D:\\hadoop-2.6.0-cdh5.15.0");

        Configuration conf = new Configuration();
        conf.set("zookeeper.znode.parent", "/hbase");
        conf.set("hbase.zookeeper.quorum", "candle");
        conf.set("hbase.zookeeper.property.clientPort", "2181");

        Connection connection =
                ConnectionFactory.createConnection(conf);

        TableName tableName = TableName.valueOf("hadoop:human");
        Table table = connection.getTable(tableName);

        //插入数据
        //插入操作封装到了Put 必须要指定rowkey
//        int rowkey = 825373492;
//        Put put = new Put(Bytes.toBytes(rowkey));
//        put.addColumn(Bytes.toBytes("cf1"), Bytes.toBytes("id"), Bytes.toBytes("1"));
//        put.addColumn(Bytes.toBytes("cf1"), Bytes.toBytes("name"), Bytes.toBytes("candle"));
//
//        //触发插入的操作
//        table.put(put);

        //往table插入多行
//        ArrayList<Put> puts = new ArrayList<>();
//
//        Put put1 = new Put(Bytes.toBytes("001"));
//        put1.addColumn(Bytes.toBytes("cf1"), Bytes.toBytes("id"), Bytes.toBytes("1"));
//        put1.addColumn(Bytes.toBytes("cf1"), Bytes.toBytes("name"), Bytes.toBytes("candle"));
//        puts.add(put1);
//
//        Put put2 = new Put(Bytes.toBytes("002"));
//        put2.addColumn(Bytes.toBytes("cf1"), Bytes.toBytes("id"), Bytes.toBytes("1"));
//        put2.addColumn(Bytes.toBytes("cf1"), Bytes.toBytes("name"), Bytes.toBytes("candle"));
//        puts.add(put2);
//
//        table.put(puts);

        //查询Get  需要指定rowkey
        Get get = new Get(Bytes.toBytes("2"));
        //查询一个单元格
        //get.addColumn(Bytes.toBytes("info"), Bytes.toBytes("column"));

        //Result 封装了查询的结果
        Result result = table.get(get); //一次查询一行

        Map<String, String> cellMap = getRowResult(result);  //.........
        //查询得到一个单元格数据
        //byte[] value = result.getValue(Bytes.toBytes("info"), Bytes.toBytes("column"));

        //System.err.println(new String(value));


        //全表扫描  获取整个表  info列族数据
        ResultScanner rs = table.getScanner(Bytes.toBytes("info"));
        Iterator<Result> iterator = rs.iterator();
        while (iterator.hasNext()) {
            Result next = iterator.next();
            getRowResult(next);
        }

        //删除  Delete
        Delete delete = new Delete(Bytes.toBytes("2")); //row key
        delete.addColumn(Bytes.toBytes("info"), Bytes.toBytes("column"));
        table.delete(delete);
    }

    //把result其中 每一个cell 以map格式存储
    public static Map<String, String> getRowResult(Result result) {
        if(result.isEmpty()) {
            return null; //判断查询的结果是否为空,如果为空直接返回
        }

        HashMap<String, String> cellMap = new HashMap<>();

        //获取所有cell
        List<Cell> cells =  result.listCells();
        String family = null;
        String  key = null;
        String  value = null;

        for (Cell tmp:cells) {
            //列族 列名 值
            //
            family = Bytes.toString(tmp.getFamilyArray(),
                    tmp.getFamilyOffset(), tmp.getFamilyLength());

            key = Bytes.toString(tmp.getQualifierArray(),
                    tmp.getQualifierOffset(), tmp.getQualifierLength());

            value = Bytes.toString(tmp.getValueArray(),
                    tmp.getValueOffset(), tmp.getValueLength());

            System.err.println("famliy:" + family + "-key:" + key + "-value"  + value);
            cellMap.put(key,value);
//            tmp.getFamilyArray();//列族所在数组
//            tmp.getFamilyOffset(); //偏移
//            tmp.getFamilyLength(); //长度
//
//
//            tmp.getQualifierArray();
//            tmp.getQualifierOffset();
//            tmp.getQualifierLength();
//
//
//            tmp.getValueArray();
//            tmp.getValueOffset();
//            tmp.getValueLength();

        }


        return cellMap;

    }