javaAPI操作HBase

平台：window+linux
工具：IDEA2016

public class HbaseTest {
    public static void main(String[] args) throws Exception {
//        createTab();
//        HTable table = getTable();
//        System.out.println(table.getName());
//        putData();
        getData();
    }

    //添加文本过滤器
    public static void testFilter() {
        HTable table = null;
        try {
            table = getTable();
            Scan scan = new Scan();

            // create filter
            Filter filter = null;
            filter = new PrefixFilter(Bytes.toBytes("rk"));
            filter = new PageFilter(3);

            // create hbase comparator
            ByteArrayComparable comp = null;
            comp = new SubstringComparator("lisi");
            filter = new SingleColumnValueFilter(
                    Bytes.toBytes("info"),
                    Bytes.toBytes("name"),
                    CompareOp.EQUAL,
                    comp);

            // set filter
            scan.setFilter(filter);

            ResultScanner rs = table.getScanner(scan);
            for (Result result : rs) {
                printResult(result);
            }

        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if(table != null) {
                IOUtils.closeStream(table);
            }
        }
    }

    //HBase扫描数据
    public static void scanData() {
        HTable table = null;
        try {
            table = getTable();

            // create Scan instance
            Scan scan = new Scan();

            scan.setStartRow(Bytes.toBytes("rk0001"));
            scan.setStopRow(Bytes.toBytes("rk0003"));

            scan.addFamily(Bytes.toBytes("info"));

            // set cache
            scan.setCacheBlocks(false);
            scan.setBatch(2);
            scan.setCaching(2);

            // set permmission
//          scan.setACL(perms);


            // get scanner results
            ResultScanner rs = table.getScanner(scan);

            for(Result result : rs) {
                printResult(result);
            }

        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if(table != null) {
                IOUtils.closeStream(table);
            }
        }
    }

    //一个打印的方法
    public static void printResult(Result rs) {
        for (Cell cell : rs.rawCells()) {
            System.out.println(
                    Bytes.toString(CellUtil.cloneFamily(cell)) + " : " +
                            Bytes.toString(CellUtil.cloneRow(cell)) + " : " +
                            Bytes.toString(CellUtil.cloneQualifier(cell)) + " : " +
                            Bytes.toString(CellUtil.cloneValue(cell))
            );
        }
    }

    //测试HBase的命名空间
    public static void testNamespace() throws Exception {
        Configuration c = HBaseConfiguration.create();
        HBaseAdmin admin = new HBaseAdmin(c );

        // create namespace
        NamespaceDescriptor namespace = NamespaceDescriptor.create("ns1").build();
//      admin.createNamespace(namespace );

        admin.deleteNamespace("ns1");

        // close resource
        admin.close();
    }


    public  static Configuration getConfiguration(){
        Configuration conf = HBaseConfiguration.create();
        conf.set("hbase.rootdir","hdfs://10.23.12.183:8020/hbase");
        conf.set("hbase.zookeeper.quorum","10.23.12.183");
        return conf;
    }

    public  static  void getData() throws Exception {
        HTable table  =getTable();
        Get get =  new Get(Bytes.toBytes("rk0001"));
        Result result = table.get(get);
        for (Cell cell: result.rawCells()
             ) {
            System.out.println(Bytes.toString(CellUtil.cloneRow(cell)));
            System.out.println(Bytes.toString(CellUtil.cloneFamily(cell)));
            System.out.println(Bytes.toString(CellUtil.cloneQualifier(cell)));
            System.out.println(Bytes.toString(CellUtil.cloneValue(cell)));
        }
    }

    //往一个表中插入数据
    public  static  void  putData() throws Exception {
        HTable table = getTable();
        //插入一个行健row
        Put put = new Put(Bytes.toBytes("rk0001"));

        put.add(Bytes.toBytes("info"),Bytes.toBytes("name"),Bytes.toBytes("lisi"));
        table.put(put);
        table.close();
    }

    //从HBase中读出一个Tab所属的表
    public  static  HTable getTable() throws Exception {
        HTable table = new HTable(getConfiguration(),Bytes.toBytes("t1"));
        return table;
    }

    //往HBase中写入一个Tab“t1”
    public  static  void createTab() throws Exception {
        HBaseAdmin admin = new HBaseAdmin(getConfiguration());

        boolean b = admin.tableExists(Bytes.toBytes("t1"));
        if(b){
            admin.disableTable(Bytes.toBytes("t1"));
            admin.deleteTable("t1");
        }
        HTableDescriptor table  = new HTableDescriptor(TableName.valueOf("t1"));
        table.addFamily(new HColumnDescriptor((Bytes.toBytes("info"))));
        table.addFamily(new HColumnDescriptor((Bytes.toBytes("secret"))));

        admin.createTable(table);
        admin.close();
    }

}

POM.XML为

4.0.0
    com.jxky.bigdata
    hbase
    0.0.1-SNAPSHOT

    
        1.1.12
        2.6.0-cdh5.7.0
    

    
        
            cloudera
            https://repository.cloudera.com/artifactory/cloudera-repos/
        
    

    
        
            org.apache.hbase
            hbase-client
            ${hbase.version}
        
        
            org.apache.hbase
            hbase-server
            ${hbase.version}
        
        
            org.apache.hadoop
            hadoop-client
            ${hadoop.version}