hbase的java操作

来源：互联网发布：百成玻璃优化排版软件编辑：程序博客网时间：2024/06/05 15:52

操作hbase的分为两种，一种ddl dml，一种是获得HBaseAdmin（见表删表），一种是获得HTable（增删改查）

代码：

import java.io.IOException;import java.util.ArrayList;import org.apache.hadoop.conf.Configuration;import org.apache.hadoop.hbase.HBaseConfiguration;import org.apache.hadoop.hbase.HColumnDescriptor;import org.apache.hadoop.hbase.HTableDescriptor;import org.apache.hadoop.hbase.TableName;import org.apache.hadoop.hbase.client.HBaseAdmin;import org.apache.hadoop.hbase.client.HTable;import org.apache.hadoop.hbase.client.Put;import org.apache.hadoop.hbase.util.Bytes;import org.junit.Test;public class HbaseDao {    @Test    public void insertTest() throws Exception{        Configuration conf =  HBaseConfiguration.create();        conf.set("hbase.zookeeper.quorum", "weekend05:2181,weekend06:2181,weekend07:2181");        HTable nvshen = new HTable(conf, "nvshen");        Put name = new Put(Bytes.toBytes("rk0001"));        name.add(Bytes.toBytes("base_info"), Bytes.toBytes("name"), Bytes.toBytes("angelababy"));        Put age = new Put(Bytes.toBytes("rk0001"));        age.add(Bytes.toBytes("base_info"), Bytes.toBytes("age"), Bytes.toBytes(18));        ArrayList<Put> puts = new ArrayList<>();        puts.add(name);        puts.add(age);        nvshen.put(puts);    }    public static void main(String[] args) throws Exception {        Configuration conf =  HBaseConfiguration.create();        conf.set("hbase.zookeeper.quorum", "weekend05:2181,weekend06:2181,weekend07:2181");        HBaseAdmin admin = new HBaseAdmin(conf);        TableName name = TableName.valueOf("nvshen");        HTableDescriptor desc = new HTableDescriptor(name);        HColumnDescriptor base_info = new HColumnDescriptor("base_info");        HColumnDescriptor extra_info = new HColumnDescriptor("extra_info");        base_info.setMaxVersions(5);        desc.addFamily(base_info);        desc.addFamily(extra_info);        admin.createTable(desc);        }}

import java.util.List;import org.apache.hadoop.conf.Configuration;import org.apache.hadoop.hbase.Cell;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.TableName;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.Put;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.BinaryComparator;import org.apache.hadoop.hbase.filter.BinaryPrefixComparator;import org.apache.hadoop.hbase.filter.ByteArrayComparable;import org.apache.hadoop.hbase.filter.ColumnPrefixFilter;import org.apache.hadoop.hbase.filter.CompareFilter.CompareOp;import org.apache.hadoop.hbase.filter.FamilyFilter;import org.apache.hadoop.hbase.filter.Filter;import org.apache.hadoop.hbase.filter.MultipleColumnPrefixFilter;import org.apache.hadoop.hbase.filter.PrefixFilter;import org.apache.hadoop.hbase.filter.QualifierFilter;import org.apache.hadoop.hbase.filter.RegexStringComparator;import org.apache.hadoop.hbase.filter.RowFilter;import org.apache.hadoop.hbase.filter.SingleColumnValueFilter;import org.apache.hadoop.hbase.filter.SubstringComparator;import org.apache.hadoop.hbase.master.TableNamespaceManager;import org.apache.hadoop.hbase.util.Bytes;import org.junit.Before;import org.junit.Test;public class HbaseDemo {    private Configuration conf = null;    @Before    public void init(){        conf = HBaseConfiguration.create();        conf.set("hbase.zookeeper.quorum", "weekend05,weekend06,weekend07");    }    @Test    public void testDrop() throws Exception{        HBaseAdmin admin = new HBaseAdmin(conf);        admin.disableTable("account");        admin.deleteTable("account");        admin.close();    }    @Test    public void testPut() throws Exception{        HTable table = new HTable(conf, "person_info");        Put p = new Put(Bytes.toBytes("person_rk_bj_zhang_000002"));        p.add("base_info".getBytes(), "name".getBytes(), "zhangwuji".getBytes());        table.put(p);        table.close();    }    @Test    public void testGet() throws Exception{        HTable table = new HTable(conf, "person_info");        Get get = new Get(Bytes.toBytes("person_rk_bj_zhang_000001"));        get.setMaxVersions(5);        Result result = table.get(get);        List<Cell> cells = result.listCells();//          result.getValue(family, qualifier);  可以从result中直接取出一个特定的value        //遍历出result中所有的键值对        for(KeyValue kv : result.list()){            String family = new String(kv.getFamily());            System.out.println(family);            String qualifier = new String(kv.getQualifier());            System.out.println(qualifier);            System.out.println(new String(kv.getValue()));        }        table.close();    }    /**     * 多种过滤条件的使用方法     * @throws Exception     */    @Test    public void testScan() throws Exception{        HTable table = new HTable(conf, "person_info".getBytes());        Scan scan = new Scan(Bytes.toBytes("person_rk_bj_zhang_000001"), Bytes.toBytes("person_rk_bj_zhang_000002"));        //前缀过滤器----针对行键        Filter filter = new PrefixFilter(Bytes.toBytes("rk"));        //行过滤器        ByteArrayComparable rowComparator = new BinaryComparator(Bytes.toBytes("person_rk_bj_zhang_000001"));        RowFilter rf = new RowFilter(CompareOp.LESS_OR_EQUAL, rowComparator);        /**         * 假设rowkey格式为：创建日期_发布日期_ID_TITLE         * 目标：查找  发布日期  为  2014-12-21  的数据         */        rf = new RowFilter(CompareOp.EQUAL , new SubstringComparator("_2014-12-21_"));        //单值过滤器 1 完整匹配字节数组        new SingleColumnValueFilter("base_info".getBytes(), "name".getBytes(), CompareOp.EQUAL, "zhangsan".getBytes());        //单值过滤器2 匹配正则表达式        ByteArrayComparable comparator = new RegexStringComparator("zhang.");        new SingleColumnValueFilter("info".getBytes(), "NAME".getBytes(), CompareOp.EQUAL, comparator);        //单值过滤器2 匹配是否包含子串,大小写不敏感        comparator = new SubstringComparator("wu");        new SingleColumnValueFilter("info".getBytes(), "NAME".getBytes(), CompareOp.EQUAL, comparator);        //键值对元数据过滤-----family过滤----字节数组完整匹配        FamilyFilter ff = new FamilyFilter(                CompareOp.EQUAL ,                 new BinaryComparator(Bytes.toBytes("base_info"))   //表中不存在inf列族，过滤结果为空                );        //键值对元数据过滤-----family过滤----字节数组前缀匹配        ff = new FamilyFilter(                CompareOp.EQUAL ,                 new BinaryPrefixComparator(Bytes.toBytes("inf"))   //表中存在以inf打头的列族info，过滤结果为该列族所有行                );       //键值对元数据过滤-----qualifier过滤----字节数组完整匹配        filter = new QualifierFilter(                CompareOp.EQUAL ,                 new BinaryComparator(Bytes.toBytes("na"))   //表中不存在na列，过滤结果为空                );        filter = new QualifierFilter(                CompareOp.EQUAL ,                 new BinaryPrefixComparator(Bytes.toBytes("na"))   //表中存在以na打头的列name，过滤结果为所有行的该列数据                );        //基于列名(即Qualifier)前缀过滤数据的ColumnPrefixFilter        filter = new ColumnPrefixFilter("na".getBytes());        //基于列名(即Qualifier)多个前缀过滤数据的MultipleColumnPrefixFilter        byte[][] prefixes = new byte[][] {Bytes.toBytes("na"), Bytes.toBytes("me")};        filter = new MultipleColumnPrefixFilter(prefixes);        //为查询设置过滤条件        scan.setFilter(filter);        scan.addFamily(Bytes.toBytes("base_info"));        ResultScanner scanner = table.getScanner(scan);        for(Result r : scanner){            /**            for(KeyValue kv : r.list()){                String family = new String(kv.getFamily());                System.out.println(family);                String qualifier = new String(kv.getQualifier());                System.out.println(qualifier);                System.out.println(new String(kv.getValue()));            }            */            //直接从result中取到某个特定的value            byte[] value = r.getValue(Bytes.toBytes("base_info"), Bytes.toBytes("name"));            System.out.println(new String(value));        }        table.close();    }    @Test    public void testDel() throws Exception{        HTable table = new HTable(conf, "user");        Delete del = new Delete(Bytes.toBytes("rk0001"));        del.deleteColumn(Bytes.toBytes("data"), Bytes.toBytes("pic"));        table.delete(del);        table.close();    }    public static void main(String[] args) throws Exception {        Configuration conf = HBaseConfiguration.create();//      conf.set("hbase.zookeeper.quorum", "weekend05:2181,weekend06:2181,weekend07:2181");        HBaseAdmin admin = new HBaseAdmin(conf);        TableName tableName = TableName.valueOf("person_info");        HTableDescriptor td = new HTableDescriptor(tableName);        HColumnDescriptor cd = new HColumnDescriptor("base_info");        cd.setMaxVersions(10);        td.addFamily(cd);        admin.createTable(td);        admin.close();    }}

0 0